Contents

• Why the Analog Protocol is Still Good, But Not Good Enough for the Clinician
• What will the implementation of digital technologies bring?
• Basic elements of a clinic’s digital ecosystem and their role
• How to build interaction with the laboratory
• Possible options for equipping the clinic
• Clinical scenarios and work protocols
• Practical recommendations for implementation and training
• Typical implementation errors and ways to minimize them
• Conclusion and roadmap for old-school clinicians
• Sources

It’s easy to imagine an experienced dentist with a successful and well-established practice system. They have patients, good results, and their current practice generates a stable income. The advent of digital technology is often perceived as something unnecessary and redundant. Even if the benefits are obvious, few people, even subconsciously, want to return to the status of a newbie and make large investments with uncertain prospects. Our goal isn’t to prove that analog methods are insufficient. We want to explore the general principles and the opportunities offered by different levels of digital technology implementation. We also want to explore where to start and how to avoid mistakes and wasteful spending.

Digital dentistry doesn’t replace professional expertise; it improves the predictability of results, reduces routine procedures, and saves time. On the other hand, a young and less experienced specialist armed with digital protocols and tools can easily match and even surpass the quality and, most importantly, the speed of a colleague who works exclusively with traditional methods.

Why is digitalization so important?

• Time: Fewer hours in the chair for adjustments and corrections means more time for seeing new patients and handling complex cases.
• Reducing operational risks: Digital documentation and accurate files reduce the likelihood of miscommunication with the laboratory and mitigate legal risks.
• Quality assurance: The ability to check and adjust the virtual model before starting lab work reduces the number of surprises during the try-in.
• Marketing effect: For some patients, digital technology is a sign of modernity and a commitment to results; this helps retain and attract an affluent clientele.

What not to do

• It is not necessary to purchase an entire set of equipment at once.
• There’s no need to change the entire workflow overnight — pilot cases and gradual integration maintain service quality.
• You should not implement protocols “by the book” without adapting them to your own clinical philosophy.

Why the Analog Protocol is Still Good, But Not Good Enough for the Clinician

Typical problems of analog workflows

Minor inaccuracies and errors in an analog protocol seem insignificant, but when combined, they create a systemic problem: they increase the number of remakes, lengthen the treatment cycle, and reduce the predictability of outcomes. Analog protocols are particularly prone to errors in complex clinical cases, as shown in the photo below.

A complex clinical case for restoration. /shutterstock

All this together causes patient dissatisfaction and increases the chances that they will go to another specialist.

Technical sources of errors

• Distortion of impressions: Impression materials (silicones, polyethers) are subject to shrinkage, deformation upon removal, and dimensional changes during storage and transportation. This results in unclear preparation margins and an inaccurate internal restoration surface.
• Problems with stone pouring: Bubbles, shrinkage, incorrect water-to-powder ratios, and delays between impression taking and pouring increase model variability.
• Loss of small details: Subgingival margins, fine marginal lines, and micro-irregularities are often lost in the analog chain, especially with insufficient retraction and imperfect impression-taking techniques.

Steps in the fabrication of a plaster model of a unilateral maxillary defect in a laboratory setting, showing (A) the silicone mold, (B) blocking out unwanted teeth to create the defect, (C) modeling the defect with wax, (D) the casting removed from the mold after hardening, and (E) the finished model after trimming the unilateral defect. MDPI, Development and Comparison of Conventional and 3D-Printed Laboratory Models of Maxillary Defects; by Ahmad Alanezi; Published: 27 April 2023

Images of 3D printed models of maxillary defects showing (A) a unilateral posterior defect and (B) a model of a central palatal defect. MDPI, Development and Comparison of Conventional and 3D-Printed Laboratory Models of Maxillary Defects; by Ahmad Alanezi; Published: 27 April 2023

Organizational and communication weaknesses

• Vague laboratory prescriptions: Verbal instructions, incomplete photographic data, and the lack of a standardized file package lead to discrepancies between the clinic and the laboratory.
• Lack of intermediate validation: The analog protocol doesn’t provide a simple way to “try on” the result before final processing; errors are only detected during a try-in in the chair.
• Logistics and time: Transporting models, waiting in line at the lab, and postal delays lengthen the cycle time and increase the risk of damage or data loss.

Clinical and economic consequences

• High proportion of defective impressions: Research and industry reports show that a significant portion of impressions arrive at the lab with at least one noticeable defective area; this does not always lead to immediate rework, but it increases the likelihood of future remakes.
• Cost of remakes: According to industry estimates, the average share of remakes in traditional workflows amounts to several percent of the total volume, which, on the scale of a practice and a network of clinics, translates into significant direct and indirect costs.
• Extended treatment cycle: The typical time interval from the initial impression to final delivery in an analog protocol often takes weeks; if a remake is required, the time frame increases exponentially. This reduces patient satisfaction and increases the clinic’s workload.

How errors accumulate and why they are costly

• Compound effect: Each stage introduces its own margin of error — from the impression technique to the manual processing of the model and the technician’s interpretation. This adds up to significant variability in fit and occlusion.
• Hidden costs: Return visits, additional dentist and assistant time, shipping materials, patient compensation, and lost appointments are rarely factored into the initial cost estimate for restoration. The average cycle time from initial impression to final delivery can be 2–6 weeks; with remakes, it can take up to 8–12 weeks.

Typical clinical scenarios with the highest risk

• Multiple restorations such as bridges: Positioning accuracy and the passive fit of the framework are critical here; analog errors lead to complex and costly remakes.
• Subgingival margins and fine marginal lines: With poor retraction and an imperfect impression, the marginal adaptation of the crown is often unsatisfactory.
• Complex occlusion and articulation: Manual contact testing and articulation on the model do not always reproduce the dynamics in the oral cavity, which leads to chairside adjustments.

Practical indicators for assessing the vulnerability of practices

• Percentage of cases with chairside adjustments: Record and analyze.
• Average cycle time from impression to delivery: Compare with target indicators.
• Frequency of remakes by reason: Marginal discrepancy, occlusion, aesthetics.
• The proportion of impressions received by the laboratory with visible defects: If it is above industry benchmarks, this is a signal for change.

How to reduce risks in an analog protocol

• Standardize the laboratory transfer package: Photographs of the preparation, bite records, clear instructions on shade and materials.
• Introduce an intermediate check: If possible, send digital photos and scans of the model for preliminary evaluation before final processing.
• Analyze and document errors: Keep a log of the reasons for remakes and the time spent on adjustments.

What’s the bottom line?

While the analog protocol remains functional and produces good results in the hands of an experienced specialist, it is systemically vulnerable to the accumulation of minor errors that lead to remakes, extended treatment cycles, and hidden costs. For a clinic that places implant systems, this is an important context: digital tools don’t so much replace expertise as they eliminate sources of variability in the workflow and improve the reproducibility of results. The next section will examine in detail the role of digital tools in addressing these issues and the specific clinical scenarios where the benefits are most noticeable.

What will the implementation of digital technologies bring?

Accuracy

Digital scans and CAD models reduce overall errors by eliminating several manual steps: Physical impressions, stone pouring, and manual model processing. An intraoral scanner captures the geometry of the dental arch and preparation margins with high resolution; CAD tools allow for the design of fit and contacts with micron precision. Practical effect: Fewer marginal gaps, more predictable fit of abutments and crowns, reduced remakes.

Speed

Eliminating physical steps reduces cycle time: There’s no need to wait for impressions to be delivered and models to be poured; the lab receives the digital file instantly. This speeds up the production of temporary restorations and the printing of surgical guides, and allows for faster design approval with the technician. Result: A reduction in the number of patient visits and a more compact clinic schedule.

Predictability

Virtual planning (DICOM + STL fusion, implant positioning simulation, virtual try-ins) makes it possible to anticipate conflict situations before surgery or prosthetic fabrication. This reduces clinical uncertainty: bone thickness, the position of anatomical structures, the need for bone grafting, and the optimal abutment position can be assessed in advance.

Communication

Single Digital File (STL/DICOM): Standardizes data exchange between the clinic, laboratory, and patient. Visual renderings and 3D models simplify the coordination of aesthetics and functionality, reduce misunderstandings in technical specifications, and speed up feedback from technicians. For the implant manufacturer, this means more accurate use of component libraries and a reduced likelihood of compatibility errors.

Documentation

All stages are saved digitally: scans, CAD model versions, planning protocols. Advantage: A transparent treatment history for auditing, training, and complex case reviews; this also reduces legal risks and simplifies post-marketing support.

Impact on key specialties

• Prosthodontist: virtual try-in, CAD occlusion analysis, precise fitting of abutments and crowns; fewer chairside adjustments.
• Oral Surgeon: CBCT-based implantation planning, production of surgical guides, possibility of minimally invasive protocols and immediate loading.
• Orthodontist: digital monitoring of movements, production of clear aligners, and modeling of intermediate stages of treatment.
• Restorative Dentist: quick production of temporary restorations, control of contacts and anatomy during complex restorative work.

Practical implementation tip for an implant manufacturer

Get Started with DICOM + IOS Integration and the use of implant libraries in CAD: This provides maximum clinical benefit with a moderate investment. Initially, purchasing an intraoral scanner and scan bodies for the workflow may be sufficient.

Intraoral scanner. /shutterstock

You can test the software for free, but it is better to purchase a license in the future. Paid planning packages provide:

• Automatic DICOM+STL registration
• Virtual implant positioning tools
• Export of surgical guides
• Implant libraries and accuracy reports

Most manufacturers, including XGATE Dental, provide libraries with 3D images of implants, abutments, and other superstructures compatible with CAD/CAM technologies.

Additional equipment and services (as competencies grow)

• 3D printer for surgical guides and temporary restorations: Speeds up the protocol and reduces dependence on an external laboratory.

A sample of a custom surgical guide. /shutterstock

• Milling machine (including a milling machine for zirconia) for a full production cycle in a clinic or in-house laboratory.
• Articulator — digital interface and software for virtual occlusion — for complex occlusion cases.

The article further presents specific clinical scenarios, a cost-benefit model, and checklists for minimizing risks when transitioning to a digital protocol.

Basic elements of a clinic’s digital ecosystem and their role

Intraoral scanner: The starting point

An IOS replaces the physical impression and creates a digital model of the dental arch; the entire subsequent process — planning, design, and fabrication of the restoration — depends on the quality of the scan. Accuracy and reproducibility are critical for clinical practice (especially for bridges and total restorations), scanning speed, format compatibility (STL/PLY/OBJ), and a user-friendly interface for the team. Current reviews and guidelines indicate that for private practice, an accuracy of about 20–30 microns is required, and for specialized laboratories, 10–15 microns; the choice of scanning technology influences the clinical outcome.

High-resolution intraoral scanner. /shutterstock

Selection criteria and working protocols

• Accuracy and reproducibility: Key for the passive seating of bridges and the precision of abutments.
• Scanning speed: Affects patient comfort and clinic throughput.
• Format compatibility: STL export and DICOM integration support are required.
• Convenience of the interface: Short training period for a dentist and assistant.
• Working protocol: Field dryness, retraction of preparation margins, scanning sequence, and margin control are essential for a high-quality result.

CAD software and diagnostic services

• CAD: Design of abutments, crowns, frameworks; virtual occlusion; simulation of aesthetics. The availability of implant libraries and convenient virtual try-in tools speeds up approval with the laboratory.
• Diagnostics: The combination of CBCT (DICOM) and IOS (STL) allows for bone volume assessment, implant position matching with coronal anatomy, and pre-planning for bone grafting.
• Selecting software: Open ecosystems offer flexibility in choosing labs; closed ecosystems offer stability and optimization for a specific workflow. For implantology, paid packages with DICOM+STL support and implant libraries are a practical necessity.

A sample of workflows with specialized software for dentists. /shutterstock

3D printers and milling machines

• 3D printing: Rapid production of surgical guides, temporary crowns, and try-in models; accelerates the protocol and reduces dependence on external contractors.

A custom 3D-printed surgical guide. /shutterstock

• Milling: Production of permanent restorations from PMMA, ceramics, and zirconia; provides high strength and precision, but requires investment and post-processing skills.

A milling machine is a part of a CAD/CAM system. /shutterstock

• Restrictions: Materials, post-processing requirements, tolerances, and certification of materials for clinical use.

DICOM and STL integration

Data merging — the combination of CBCT and an intraoral scanner provides an accurate virtual model for implant positioning and soft tissue assessment. Compatibility issues include different formats, software versions, and scanning artifacts; visual validation of registration and the use of software with proven merging algorithms are important.

Brief table of component roles

How to build interaction with the laboratory

If purchasing full-cycle equipment is not feasible, a reliable and predictable partnership with a dental laboratory is essential. Below, we’ve outlined key practical considerations: data transfer standards, a mandatory unified package, labeling and file versioning rules, and working agreements on communication and quality control. This material is intended for clinicians and clinic managers who want to minimize remakes and speed up treatment cycles.

Data transfer standards and checklists

Single package for sending to the laboratory

Each digital order must be accompanied by a standardized data set. This reduces the risk of misunderstandings and speeds up the technician’s work.

• STL scan: The main file with the digital impression; if there are several files (bite, upper/lower), send them all.
• Photos of the preparation: Frontal, occlusal, lateral views; macro photo of the marginal zone.
• Shade: Shade guide code (VITA/other) and photo in natural/standard lighting.
• Bite: Static and, if necessary, dynamic registration (lateral and anterior displacements).
• Material instructions: Brand and type of ceramics/resin/metal; polishing and glazing requirements.
• Desired height and contact: Precise clinical wishes regarding contacts, interdental spaces, and crown height.
• CBCT (DICOM): If implantation or complex reconstruction is planned; send along with the STL.
• Clinical notes: A brief description of the clinical situation, limitations, and priorities (aesthetics/strength/time).

Visualization of expectations

• Submit CAD model screenshots and 3D renderings along with STL. Visual cues (arrows, marks) reduce the risk of misinterpretation.
• Set priorities: “Maximum aesthetics,” “minimal processing,” “priority — strength.” This helps the technician choose materials and strategies.

Feedback and reviews

• Intermediate files: Require the lab to send intermediate artifacts — a virtual model for approval, a test print, or a validation STL before final processing.
• Check within 24-48 hours: Set a rule for a prompt response to intermediate files; this reduces the cycle time and the number of revisions.
• Photo protocol of the try-in: When trying on the products in the laboratory or clinic, take photos and short notes about any necessary adjustments.

Agreements and SLAs

• Turnaround time (SLA): Agree on standard timeframes for typical work (e.g., temporary crown — 48-72 hours; permanent crown — 7-10 business days; surgical guide — 48-72 hours).
• Remake policy: Clearly state which cases are covered by the laboratory free of charge (file errors, library mismatches) and which require an additional fee (design changes at the doctor’s request).
• Responsibility for fit and polish: Define the boundaries of responsibility — the laboratory is responsible for the accuracy of production within the specified tolerances; the clinic is responsible for clinical preparation (retraction, dry field, correct scanning).
• Escalation of controversial cases: Contact person in the laboratory and in the clinic, response times for complaints, return/remake procedure.

Recommendations for the implementation of work protocols

• Standardize your prescription template: Use a single electronic form that the assistant fills out for each order.
• Test cases: Before a mass transition to a digital protocol, complete 10–20 test orders with the selected laboratory, recording the time and reasons for modifications.
• Regular case studies: monthly clinic ↔ laboratory meetings for analyzing errors and optimizing checklists.
• Document SLA and remake policies in writing and include them in the contract with the laboratory.

Possible options for equipping the clinic

Over time, almost all clinics grow and decide to equip their own laboratory. Below, we describe the typical development path and equipment set for digital dentistry. Below is a comparative summary of three typical configurations and detailed explanations for each.

Brief comparison table

Details on the options

Basic

Composition: Intraoral scanner and software capable of merging STL and DICOM, plus a standard scan body set for the implant systems used.

Clinical effect: Digital documentation, accelerated data transfer to the laboratory, reduction of errors associated with physical impressions.

Investments and risks: Relatively low capital costs; dependence on an external laboratory remains a key factor, especially for the fabrication of permanent restorations.

Extended

Composition: Everything from the basic kit plus a 3D printer, materials for printing surgical guides and temporary crowns, post-processing tools (ultraviolet curing chamber, rinsing station).

Clinical effect: The ability to print surgical guides and temporary structures within the clinic, reducing the time until the temporary crown is installed and increasing control over the treatment protocol.

Investments and risks: Medium investment; limitations in the mechanical properties and biocompatibility of some printing materials require careful selection of cases for in-house production.

Full cycle

Composition: Intraoral scanner, software with DICOM+STL support and implant libraries, 3D printer, 5-axis milling machine, a set of milling materials (PMMA, ceramic blocks, zirconia), dust removal, and post-processing systems.

Clinical effect: Control over all stages — from scanning to final restoration; the ability to manufacture permanent structures in the clinic or in-house laboratory; reduced cycle time and dependence on external contractors.

Investments and risks: Significant capital investment and operating costs; the need for personnel training and the allocation of production space; the need for strict quality control and certification of materials.

Factors influencing configuration selection

• Clinical priorities: Implantology and complex bridge prosthetics often justify investments in extended and complete configurations.
• Scope of Practice: When the clinic is heavily loaded, time savings and production autonomy provide a faster return on investment.
• Budget and spending model: Cloud software subscriptions and production outsourcing reduce CAPEX but increase OPEX; hardware purchases increase autonomy and CAPEX.
• Availability of a laboratory: A close partnership with a digital lab can make the basic kit an optimal solution at the initial stage.
• Regulatory and insurance requirements: Materials and processes must comply with local standards and patient safety requirements.

Technical and organizational nuances

• Compatibility and ecosystem: Preference is often given to solutions with open export formats (STL/PLY/OBJ) and support for implant libraries; closed ecosystems can provide smoother integration but limit flexibility.
• Training and support: The availability of local technical support and training programs from the manufacturer influences the speed of implementation and the quality of the first clinical cases.
• Infrastructure: Milling operations require dedicated space, ventilation, and a waste disposal system; 3D printing requires space for post-processing and material storage.
• Quality of materials: Certified blocks and resins improve clinical reliability but increase the cost per unit of restoration.

Economic outlook and payback scenarios

• Basic option: Typically shows a return on investment due to reduced remakes and faster laboratory approvals; the payback period depends on the order volume and the cost of outsourced manufacturing.
• Extended version: Provides additional economic benefits by reducing the time to temporary restoration placement and lowering logistics costs; payback is often faster with an active implantology practice.
• Full cycle: Provides the highest margins for the production of restorations, but requires a longer payback period and strict management of production costs.

Final thoughts on choosing a configuration

The choice of configuration is usually determined by a combination of clinical objectives, financial model, and willingness to invest in training and infrastructure. For practices where predictability of implant protocols and quality control of restorations are a priority, it makes sense to consider a gradual expansion from a basic set to an intermediate one and then to a full cycle as experience and the volume of work accumulate.

Clinical scenarios and work protocols

This section provides an overview of typical clinical scenarios in which digital technologies are changing work protocols, as well as a list of the most common errors that impact outcomes. The descriptions are aimed at practicing dentists and technicians: the sequence of steps is provided as a reference, and key risks serve as benchmarks for quality assurance.

Implantology

Standard digital protocol

CBCT → IOS fusion → virtual implant planning → surgical guide design → guide printing → guided implantation → abutment and prosthesis design.

Key stages and their role

• CBCT: Assessment of bone volume and quality, the relationship of anatomical landmarks.
• IOS: Accurate registration of coronal anatomy and bite for comparison with CBCT.
• DICOM + STL fusion: Formation of a unified virtual model for planning.
• Planning: Selection of the implant position taking into account the prosthetic perspective; selection of the implant length and diameter.
• Surgical guide: Transfer of the virtual plan into operational reality; provides guided placement.
• Prosthetics: Design of a custom abutment and prosthesis taking into account soft tissue aesthetics.

Common mistakes and their consequences

• Inaccurate DICOM and STL registration: Displacement of the virtual coronal anatomy relative to the bone structure; possible deviations in the implant position and aesthetic impairment.
• Incorrect selection of control points for registration: The use of unstable reference points (for example, movable temporary structures) leads to alignment errors.
• Insufficient checking of bone thickness and anatomical risks: Underestimation of the need for bone grafting or proximity to anatomical structures; risk of complications and unsatisfactory primary stability of the implant.

Practical observations

In cases of immediate loading and when working in the aesthetic zone, the accuracy of registration and validation of data fusion are crucial to the outcome. For complex cases, additional verification of the guide on the model or a control scan is often used.

Prosthetics and crowns

Standard digital protocol

Preparation → scanning of the prepared tooth and bite → CAD design → manufacturing (milling/printing) → try-in and delivery.

Key stages and their role

• Scanning of preparation: Capture of the marginal zone and finish lines; basis for precise fit.
• Bite registration: Static and, if necessary, dynamic registration for correct occlusion.
• CAD design: Modeling of anatomy, contact points, and occlusal relationships.
• Manufacturing: Choice of technology (milling/printing) and material depending on the clinical task.
• Try-in: Assessment of fit, contacts, and aesthetics; final delivery.

Common mistakes and their consequences

• Incomplete capture of preparation margins: Marginal discrepancy, risk of secondary caries, and aesthetic defects.
• Ignoring interocclusal contacts: Excessive or insufficient contacts requiring chairside adjustments.
• Lack of testing on an articulator (virtual or physical): Discrepancy between the dynamics of chewing and articulation, which leads to patient discomfort and the need for corrections.

Practical observations

When working with fine marginal lines and subgingival margins, retraction and moisture control during scanning are important; for complex occlusion, virtual articulation and a test try-in on a model are helpful.

Orthodontics

Standard digital protocol

Scanning → setup → production of clear aligners/trays → progress monitoring.

Key stages and their role

• Baseline scan: The initial digital model for planning movements.
• Virtual setup: Step-by-step modeling of movements and calculation of intermediate trays.
• Production: Printing of models or direct production of aligners.
• Monitoring: Digital assessment of the conformity of the actual position of the teeth with the plan.

Common mistakes and their consequences

• Incorrect baseline registration: Displacement of reference points in the virtual model; distortion of the movement plan.
• Lack of control over intermediate stages: Accumulation of deviations from the plan, the need for corrections, and additional aligners.

Practical observations

The accuracy of the initial scan and the correct setting of clinical goals in the virtual setup determine the effectiveness of treatment; regular digital validation of intermediate stages reduces the risk of accumulated errors.

Therapeutic tasks

Standard digital protocol

Scanning → design of temporary restoration → printing/milling of temporary structure → try-in and adaptation → delivery of temporary restoration; in parallel — digital documentation for the subsequent permanent prosthesis.

Key stages and their role

• Quick temporary restorations: Maintaining aesthetics and function between treatment stages.
• Contact control: Digital occlusion check and contact correction before delivery.
• Documentation: Saving versions for the subsequent design of the permanent restoration.

Common mistakes and their consequences

• Use of unsuitable materials for temporary structures: Insufficient strength or biocompatibility, risk of breakage and tissue irritation.
• Insufficient polishing and adaptation: Patient discomfort, soft tissue injury, plaque accumulation.

Practical observations

Digitally fabricated temporary restorations streamline the protocol and facilitate patient approval, while material selection and post-processing remain critical factors for clinical success.

General comments on protocols

• Validation at every critical stage: Visual and digital verification of data merging, version control of files, and intermediate artifacts.
• Documenting deviations: Recording the reasons for modifications and their scope for subsequent analysis and optimization of protocols.
• Selecting a technology for the task: A milling machine is preferred for permanent restorations made of zirconia and ceramics; 3D printing is used for surgical guides and temporary structures.

Practical recommendations for implementation and training

Step-by-step implementation plan (6-12 months)

Pilot project: Structure and expectations

• Volume: 10–20 clinical cases selected according to pre-defined criteria (e.g., single crowns, implant guides in uncomplicated areas).
• Collection metrics: Cycle time, number of modifications (remakes/chairside adjustments), reasons for modifications, patient satisfaction, material and logistics costs.
• Analysis: Each error is documented with an indication of the cause (technical, organizational, human factor) and a proposal for corrective measures.
• Expected effect: Identifying typical errors at an early stage and adapting checklists before large-scale implementation.

Personnel training: Approach and formats

• Practical sessions: Scanning on live patients under the supervision of a trainer and practicing typical clinical scenarios; simulations on models for rare or complex cases.
• Role-playing scenarios: Practicing interaction between a dentist, assistant, and laboratory technician when transmitting a digital package.
• Checklists and standards: Standardized protocols for scanning, retraction, file export, and labeling; prescription templates for the laboratory.
• Training format: A combination of in-person master classes, online modules, and periodic refresher sessions as cases accumulate.
• Competency assessment: Practical verification of skills (e.g., quality control of 10 scans for each operator) and documentation of results.

Laboratory Integration: Testing and approval

• Test transmissions: A series of trial orders with a full package (STL, photo, bite, DICOM if necessary) and subsequent analysis of the results.
• Coordination of formats: Checking the compatibility of exported files, implant libraries, and software versions; fixing working formats in a contract or work regulations.
• SLA and remake policy: Definition of standard terms and conditions of liability; protocols for escalation of disputed cases.
• Feedback: Regular meetings (e.g., monthly) to review cases and adjust checklists.

KPI evaluation and regular audit

• Recommended KPIs:
  • Cycle time (from scanning to delivery).
  • Percentage of revisions (chairside adjustments; remakes).
  • Average time to complete a revision (dentist/assistant hours).
  • Patient satisfaction (short survey after delivery).
  • Economic indicator (cost of restoration vs. margin).
• Reporting frequency: Monthly KPI monitoring for the first 6 months, then quarterly reviews.
• Audit: Regular case reviews with the laboratory and internal sessions on error analysis and protocol improvement.

Scaling and further development

• Threshold for expansion: Accumulation of a sufficient number of successful cases and positive KPI dynamics; an economic model demonstrating the return on additional investment.
• Expansion sequence: Adding 3D printing → expanding the range of printed materials → introducing milling production for permanent restorations.
• Competency support: Regular training updates when introducing new technologies and materials; documented procedure for validating new work processes.

Scaling a digital protocol and transitioning to a full production cycle are impossible without a reliable hardware foundation. Even the most precise virtual plan requires seamless integration with the physical implant system. That is why it is critical to choose manufacturers whose components are designed from the ground up with CAD/CAM technologies in mind. For example, the XGate Dental ecosystem is not only integrated into most digital planning software, but it also offers an exceptionally comprehensive prosthetic portfolio. A wide selection of superstructures, multi-units, and abutments of varying heights allows technicians and clinicians to flexibly execute any digital design with micron-level precision.

XGATE Dental V-Type components.

XGATE Dental D-Type components.

Typical implementation errors and ways to minimize them

Below is a structured overview of common mistakes made during the transition to digital protocols, along with practical approaches to mitigating them. The language is descriptive: it outlines the causes, consequences, and mitigation methods, rather than providing direct instructions.

Technical errors

Poor scanning of preparation margins

Problem: Incomplete coverage of the marginal zone, artifacts from moisture or blood lead to marginal gaps and chairside adjustments.

• How to minimize: Practicing scanning techniques on models and patients; applying retraction and monitoring field dryness; regularly checking the quality of the first images in a session.

Incorrect DICOM and STL registration

Problem: Displacement of the coronal anatomy relative to the bone structure, which affects the position of the implant and the aesthetic result.

• How to minimize: Selection of stable reference points; visual validation of the merge across slices; use of markers when necessary; documentation of the merge version.

Incorrect printing and milling settings

Problem: Deformation of guides, fragility of temporary structures, non-compliance with tolerances.

• How to minimize: Conducting test batches and control measurements; regular equipment calibration; maintaining post-processing and quality control records of materials.

Organizational errors

Lack of a data transmission standard

Problem: Incomplete packages, discrepancies with the laboratory, increased number of iterations.

• How to minimize: Implementation of a unified checklist for transfer (STL, photo, bite, shade, material instructions); recording of file formats and versions.

Insufficient staff training

Problem: Variability in scan quality and file export errors; slowdown in workflow.

• How to minimize: Practical sessions with skill verification; simulations of rare scenarios; documented protocols and periodic refresher sessions.

Resistance to change in the team

Problem: Slow implementation rate, return to old practices, loss of consistency.

• How to minimize: Demonstration of results using real-world cases and KPIs; involvement of key employees in the pilot project; gradual integration of technologies.

Communication errors

Unclear laboratory instructions

Problem: Incorrect interpretation of technical specifications, additional iterations.

• How to minimize: Visual approvals (screenshots of CAD renders), marks on 3D renders, requirement for intermediate files for validation.

Not meeting patient expectations

Problem: The gap between the promised and achieved aesthetic result, decreased satisfaction.

• How to minimize: Demonstration of visualizations of the result, discussion of alternatives and limitations of the protocol, documentation of agreed expectations.

General risk control practices

• Error and cause logging: Systematization of the reasons for remakes and their frequency for subsequent analysis.
• Interim validation of critical artifacts: Checking trial STLs/renderings before final processing.
• Regular case studies between the clinic and the laboratory: Identifying recurring problems and adjusting checklists.

Conclusion and roadmap for old-school clinicians

Digital transformation may not be a substitute for professional excellence, but rather a tool for increasing predictability, reducing routine procedures, and protecting the dentist’s time. For practices with an established client base and honed skills, the most rational implementation sequence appears to be a gradual addition of technologies, starting with those that deliver the greatest clinical benefit with minimal investment.

Brief summary of the approach

Starting point: An intraoral scanner and software capable of merging CBCT (DICOM) and STL scans. This combination provides the greatest return on investment: fewer remakes, shorter cycle times, improved communication with the lab, and more transparent patient documentation.

The next stage: 3D printing for surgical guides and temporary restorations, which speeds up the protocol and reduces dependence on external contractors.

The final stage: A milling machine and a full production cycle in a clinic or in-house laboratory, justified by the availability of work volume, training resources, and infrastructure.

A practical 12-month roadmap

Key indicators for progress assessment

• Cycle time from scanning to delivery.
• Percentage of remakes and chairside adjustments.
• Average time spent on revision.
• Patient satisfaction after delivery.
• Economic effect: Restoration cost and margin under different production scenarios.

Practical notes on risks and resources

• An initial focus on the quality of the input data (retraction, field dryness, scanning technique) usually yields the greatest returns.
• Pilot cases serve to adapt protocols to the specifics of practice and laboratory settings; their results form the basis for decisions on further investments.
• Staff training and regular case reviews with the laboratory reduce organizational and communication risks.
• The decision to undertake a full production cycle is advisable when the volume of work is stable and resources are available for training, certification of materials, and organization of the production space.

Final thought

For a clinician with an established practice, digital transformation can be a tool for preserving and expanding on existing achievements: not so much disrupting the established model as strengthening it through predictability, speed, and transparent communication. A step-by-step, measurable approach focusing on the first 12 months allows for real benefits to be realized and informed decisions to further expand the technology portfolio.

Sources

How Digital Workflows Improve Restoration Accuracy and Reduce Remakes in Dental Labs; By Mark Guo; July 22, 2025

MDPI, Development and Comparison of Conventional and 3D-Printed Laboratory Models of Maxillary Defects; by Ahmad Alanezi; Published: 27 April 2023

The Journal of Prosthetic Dentistry, November 2022; Accuracy of impressions for multiple implants: A comparative study of digital and conventional techniques; Mingyue Lyu, DMD Candidate

Contents

• Abutment selection: the concept of multi-unit abutments
• Important considerations when choosing an implant system for screw-retained restorations
• Comparison of characteristics for dentistry

In the previous part, we concluded with the selection of implant placement sites for full-arch rehabilitations supported by 4 or 6 implants. Let’s briefly recap that this design often requires angulated implant placement. In the maxilla, the implants can be tilted anteriorly, as shown in the following illustration.

One of the options for placing implants in the upper jaw for a Full-Arch on 4 restoration. YouTube/ Dr. Sergey Rozhnov /sergiodontolog

The same applies to the maxillary tuberosities, especially if the patient is prone to bruxism and/or requires a full complement of teeth. The illustration below shows a version with six implants, the two distal ones being anchored in the maxillary tuberosities (tuber maxillae), which allows the maxillary sinuses to be bypassed.

Option for the placement of 6 implants with distal tilting and anchorage in the tuberosities. YouTube/ Dr. Sergey Rozhnov /sergiodontolog

In the mandible, only straight implant placement or anterior tilting is possible.

Abutment selection: the concept of multi-unit abutments

Let us recall the difference between abutment-level and implant-level restorations.

Let’s start with implant-level restorations. Everything is extremely simple here: the abutment is secured to the implant, and the prosthesis is rigidly fixed to the abutment. With this approach, the implant/abutment connection bears the maximum mechanical load (indicated by the red arrows in the illustration below). The illustration shows two implant/abutment connection options: on the left, without platform switching, and on the right, with platform switching. However, both options involve implant-level restorations; the difference in platform switching is important for the formation of the biological width (gingival attachment), not for the mechanical properties of the restoration.

Implant placement options: crestal (left) without platform switching; subcrestal with double platform switching (right); both options are restored at the implant level. YouTube/ Dr. Sergey Rozhnov /sergiodontolog

It’s also worth briefly mentioning the crestal and subcrestal placement of implants. There are clear indications for subcrestal placement. If the soft tissue thickness above the alveolar crest is 2 mm or less, subcrestal placement is recommended, meaning the implant platform is inserted 1-1.5 mm below the crestal bone level. A steep and smooth emergence angle and double platform switching are essential. The image below shows a correctly performed subcrestal placement of the implant.

IMPORTANT! Subcrestal implant placement without platform switching is highly discouraged. Instead of benefits, complications may result.

Subcrestal implant placement + multi-unit abutment with double platform switching. YouTube/ Dr. Sergey Rozhnov /sergiodontolog

Let’s return to the concept of implant-level screw retention. This is most often used for single-tooth restorations, where the crown is fabricated on a Ti-base and a single screw secures the entire structure to the implant. Direct single-tooth screw fixation can also be used for two-unit and, very rarely, three-unit restorations; see the images below. These provisional restorations are shown with implant-level screw retention.

Provisional two-implant supported restorations – implant-level screw retention (insertion complexity is due to significant axial divergence). YouTube/ Dr. Sergey Rozhnov /sergiodontolog

The examples were intentionally chosen to illustrate rather complex cases with significant axial divergence between the implants. They highlight one of the main drawbacks of multi-unit implant-level screw retention: the difficulty of ensuring a passive fit and tightening the screws without gaps or strain in restorations other than single units.

Abutment-level screw retention is used for multi-unit restorations and avoids these issues. It utilizes two screws and a multi-unit abutment. One screw securely attaches the abutment to the implant, while the second secures the restoration to the abutment. For straight multi-unit abutments, the retaining screw is integrated into the abutment itself, while angled abutments are secured with a separate screw (see the illustration below).

Diagram of a screw-retained prosthesis on multi-unit abutments: MUA V-type with an ultra-low profile (left); straight and angled MUA D-type (right).

In this case, improper seating and excessive stress at the implant/abutment level are eliminated. Furthermore, trauma to the peri-implant soft tissue is reduced, as multi-unit abutments are placed once, immediately after soft tissue contouring. They sometimes act as healing abutments themselves and are not removed for try-ins and adjustments of the restoration. The general concept of screw-retained abutment-level restorations is shown in the illustration below.

Applications of multi-unit abutments for screw-retained prostheses: two-unit restoration on MUA V-type (left); full-arch restoration with fixation on MUA D-type (right). YouTube/ Dr. Sergey Rozhnov /sergiodontolog

The load distribution also shifts from the implant/abutment level to the abutment/restoration level. The bone around the implant is not overloaded and does not undergo excessive resorption. Even if a screw breaks or loosens, the problem can be corrected in minutes. This is why this retention method is the standard for full-arch restorations supported by 4/6 implants.

Advantages of abutment-level restorations using multi-unit abutments

• Redistribution of occlusal loads from the implant platform to the abutment platform.
• Achieving a passive fit of the prosthesis is easier—the abutment cone is short and tapers occlusally, unlike the internally-facing implant interfaces. Therefore, even with a 15-20° axial divergence between the implants, no seating issues due to poor passive fit will arise. The image below of the restoration shows that the implants were not placed in a prosthetically driven position, but the restoration successfully compensates for the axial divergence. Furthermore, angled multi-unit abutments were not required.

• Screw retention of prostheses eliminates contact of cement with soft tissues, and the restoration can be easily removed at any time for repair, replacement, or hygienic maintenance of the soft tissues under the prosthesis, which is difficult or almost impossible to do with cement-retained prostheses.
• To compensate for significant axial divergences between implants, there are several options for angled abutments (see the illustration below)—this allows for the optimal positioning of the screw access channels on the prosthesis.

• The “One Abutment, One Time” concept, as we mentioned earlier, means that the less often the soft tissue attachment needs to be disturbed, the better. The gingival margin is more stable and dense, which results in reduced marginal bone loss and a lower risk of gingival recession.

It’s also worth noting that some manufacturers specify a multi-unit abutment diameter based on the implant diameter. However, most implant platforms use a standard system with a single diameter, which is sufficient for 90% of cases. The only difference is the transgingival height. For example, XGATE Dental uses color-coded transgingival height indicators.

Of course, screw retention on multi-unit abutments is not without its drawbacks:

• Inferior marginal seal compared to cement retention. Biological fluids with a high microflora content accumulate in microgaps, which not only causes an unpleasant odor but also increases the risk of localized inflammation. Therefore, screw-retained prostheses should ideally be removed approximately every six months for soft tissue hygiene and cleaning of the prosthesis.
• It’s not always possible to position the screw access holes optimally. The anatomy of the alveolar ridge in the anterior regions often prevents implant placement without the screw access holes emerging through the aesthetic zone.
• The screw access channel itself weakens the restoration slightly, but if we are utilizing zirconia or milled bar structures, this disadvantage is mitigated.

Important considerations when choosing an implant system for screw-retained restorations

1. The implant/abutment interface is best with an internal conical connection. This provides greater stability and sealing, and also facilitates double platform switching.

Straight MUA D-type for conical connection

But this isn’t essential—platform switching can also be implemented with an internal hex connection. This interface is very common and compatible across many manufacturers.

Cross-section of an implant with an installed MUA V-type – internal hex connection

2. Compatibility of the superstructure with other brands. A real-life example involved a patient with an implant-supported bridge placed several years ago. Since then, several more teeth were lost. The prosthesis needed to be replaced and several more implants placed. It is highly advantageous that the new abutments are compatible with both the old and new implants. Consequently, there are no problems in fabricating the new prosthetic structure.
3. Compatibility with CAD/CAM technologies. This primarily refers to the availability of a CAD library with 3D geometries of all components and the ease of accessing them.
4. Availability of additional prosthetic components – impression copings, implant analogs, scan bodies, healing caps from the MUA level, etc.
   

   Additional components kit for MUA D-type

    

   

   Additional components kit for MUA V-type

5. Manufacturing accuracy of all components. This parameter is often underestimated when choosing components. It is impossible to notice visually, and even during insertion, one cannot feel that the gap between components is 150 µm instead of 50 µm. In reality, a large gap allows for micromovement, a bacterial pumping effect, and a high risk of abutment fracture. Therefore, choose manufacturers that declare strict manufacturing tolerances for their implant system components.
6. Material. We won’t discuss surface topography now. All FDA-cleared implant systems have a surface quality sufficient for reliable osseointegration. However, the type of titanium alloy plays a crucial role in full-arch prosthetic protocols supported by 4/6 implants. For example, XGATE Dental products are made of Grade 23 Ti-6Al-4V ELI (6% aluminum, 4% vanadium). This is a medical-grade, extra-low interstitial (ELI) alloy in which the content of interstitial elements (primarily oxygen, but also nitrogen, carbon, and iron) is strictly limited. Grade 23 contains almost half as much oxygen (0.13%) as Grade 5 (0.20%). Grade 23 reduces the risk of fracture in small-diameter screws used to retain dental prostheses due to its significantly higher cyclic fatigue strength, ductility, and fracture toughness.

Why Grade 23 protects screws from breakage

Dental prosthetic screws have a critically small diameter (often M1.4–M2.0) and are subject to enormous cyclic loads during mastication. Under these conditions, Grade 23 outperforms Grade 5 in three respects:

• High ductility (elongation at break). Reduced oxygen makes the metal less brittle. Grade 23 has a 10-15% higher elongation than Grade 5. With excessive tightening or micromovement of the prosthesis, a Grade 23 screw will slightly deform plastically, whereas Grade 5 would suffer immediate brittle fracture.
• Excellent fracture toughness. Grade 23’s fracture toughness is 75–90 MPa√m, while Grade 5’s is only 55–75 MPa√m. Small screws have stress concentrators—the threads. Microcracks inevitably form at the transition from the head to the body of the screw. Grade 23 inhibits the propagation of these microcracks much more effectively, preventing them from causing the screw to fail prematurely.
• Fatigue resistance in a wet environment. In the oral cavity, metal is susceptible to corrosion fatigue. Grade 23 has lower micro-notch sensitivity. During chewing (millions of micro-impacts), a Grade 23 screw lasts much longer without showing signs of fatigue failure.

Comparison of characteristics for dentistry

These same properties also apply to other parts of the superstructure and even to the walls of small-diameter implants in the interface area.

In the upcoming publications in our series, we will continue to delve into the nuances of full-arch restorations and will sequentially analyze the key clinical stages:

• Provisionalization and its protocols. The concept of intraoral welding.
• Assessment of the patient’s systemic condition.
• Rehabilitation protocols in actual clinical cases.

Reliable biomechanics and predictable results begin with the details—from the correct angulation to the physical properties of the titanium alloy. Explore the full range of MUA V-type and D-type solutions, as well as additional prosthetic components, on our website: https://xgate.dental/downloads/catalog/.