Digital dentistry has transformed restorative workflows by integrating intraoral scanning, computer-aided design (CAD), and computer-aided manufacturing (CAM). What once required multiple appointments, physical impressions, and laboratory steps can now be streamlined through digital data capture and fabrication.
However, digital dentistry is not simply a technological upgrade. Clinical success still depends on accurate preparation design, proper isolation, precise scanning technique, and disciplined finishing. The digital workflow improves efficiency and communication but does not replace the biological and mechanical principles that govern restorative dentistry.
This guide reviews the typical digital dentistry workflow from scan to final restoration, including the clinical steps, materials, and instruments commonly used throughout the process.
Key Takeaways:
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Digital dentistry integrates intraoral scanning, CAD design, and CAM fabrication to streamline restorative workflows from diagnosis to final restoration.
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Accurate tooth preparation, proper isolation, and clear margin visibility remain essential for reliable digital scan capture and restoration fit.
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Material selection and digital design parameters directly influence occlusion, contact strength, and long-term durability of the restoration.
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Successful digital workflows combine advanced scanning and fabrication technology with conventional instruments such as burs, polishing systems, and bonding materials.
Step 1: Diagnosis and Treatment Planning
Every digital workflow begins with a clinical diagnosis and restorative plan. Digital tools assist in documentation and visualization, but treatment planning remains a clinical decision based on:
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Extent of caries or structural damage
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Occlusal relationships
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Esthetic requirements
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Periodontal health
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Material selection
Digital photography, intraoral scans, and radiographs help establish baseline documentation. These records can be integrated into digital treatment planning software or shared with dental laboratories for collaborative case evaluation.
Diagnostic tools such as articulating paper, periodontal probes, and radiographic systems remain foundational, even in fully digital environments.
Step 2: Tooth Preparation
Proper tooth preparation remains the cornerstone of restorative success regardless of workflow.
For digital restorations, preparations should emphasize:
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Smooth margins
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Rounded internal line angles
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Adequate reduction for selected restorative material
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Clear margin visibility
Handpieces, diamond burs, and finishing burs are used to refine preparation geometry. Depth-cutting burs may help achieve consistent reduction for ceramic restorations such as lithium disilicate or zirconia crowns.
Proper preparation design is essential for digital scanning accuracy. Sharp edges, debris, or unsupported enamel may interfere with scan capture and restoration fit.
Step 3: Isolation and Tissue Management
Clear margin visualization is essential for accurate digital impressions.
Isolation techniques may include:
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Rubber dam placement
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Cotton roll isolation systems
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Gingival retraction cords
In many cases, retraction cord placement combined with hemostatic agents allows clear margin exposure for scanning. Tissue management instruments and cord packers help place retraction materials without damaging the gingival tissue.
Maintaining a dry field improves scanner accuracy and prevents data distortion.
Step 4: Intraoral Scanning
The digital impression begins with intraoral scanning.
Intraoral scanners capture a three-dimensional representation of the prepared tooth, adjacent teeth, and occlusal relationships.
Scanning typically involves:
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Preparation scan
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Opposing arch scan
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Bite registration scan
Accurate scanning requires:
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Dry field conditions
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Proper angulation
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Consistent scanner movement
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Adequate capture of margin details
If areas are missing or unclear, clinicians can rescan specific regions rather than repeating the entire impression.
In some cases, scanning powders or sprays may be used to reduce reflection and improve data capture on highly reflective surfaces.
Digital impressions eliminate traditional impression materials but still require careful clinical technique.
Step 5: Digital Design (CAD)
Once the scan is complete, the digital model is imported into CAD software.
Design software allows technicians or clinicians to create restorations including:
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Single crowns
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Inlays and onlays
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Veneers
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Implant-supported crowns
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Bridges
The software automatically proposes tooth anatomy based on surrounding structures. However, technicians often refine occlusion, contacts, and contours manually.
Design considerations include:
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Marginal integrity
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Interproximal contact strength
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Occlusal clearance
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Functional occlusion
Digital articulation tools simulate jaw movements to identify potential occlusal interferences before fabrication.
Step 6: Material Selection
Material choice influences both restoration design and fabrication method.
Common materials used in digital restorations include:
Lithium Disilicate
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High esthetics
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Moderate strength
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Ideal for anterior crowns, veneers, and inlays
Zirconia
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High strength
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Suitable for posterior crowns and bridges
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Increasingly used for full-contour restorations
Hybrid Ceramics and Composite Blocks
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Good shock absorption
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Often used for inlays and onlays
Material thickness requirements must be respected during preparation and digital design.
Step 7: CAM Fabrication
After design approval, the restoration is fabricated using CAM technology.
Fabrication methods typically include:
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3D printing for certain restorations or models
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Milling machines carve restorations from pre-manufactured ceramic or composite blocks.
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Milling burs and cutting tools shape the restoration according to the digital design file.
After milling, restorations may require additional processing depending on the material.
Step 8: Post-Milling Processing
Many ceramic restorations require finishing procedures after milling.
These steps may include:
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Sintering (for zirconia)
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Crystallization firing (for lithium disilicate)
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Staining and glazing
Dental porcelain ovens are typically used for these processes in laboratory environments.
For chairside restorations, polishing systems, finishing burs, and diamond polishing kits refine the restoration surface.
Proper finishing reduces plaque accumulation and improves esthetic integration.
Step 9: Try-In and Adjustment
Once the restoration is fabricated, it is evaluated intraorally.
Clinical evaluation includes:
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Marginal fit
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Proximal contact strength
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Occlusal contact
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Esthetic integration
Articulating paper is used to assess occlusion, while finishing burs may adjust minor interferences.
Interproximal finishing strips can refine contacts if necessary.
Step 10: Surface Treatment and Cementation
Restoration bonding depends on the material type.
For lithium disilicate or glass ceramics:
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Hydrofluoric acid etching
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Silane coupling agents
For zirconia restorations:
Tooth preparation surfaces may require:
Cementation instruments, mixing tips, and curing lights support accurate seating and polymerization.
Proper removal of excess cement is critical to prevent gingival irritation.
Advantages of Digital Dentistry Workflows
Digital workflows offer several benefits compared to conventional impressions:
Improved accuracy: Digital scans eliminate distortion associated with impression materials.
Enhanced communication: Digital files can be instantly shared with laboratories.
Reduced turnaround time: Chairside systems allow same-day restorations in many cases.
Improved patient comfort: Digital scanning avoids impression trays and materials that may trigger gag reflex.
Despite these advantages, clinical technique remains the determining factor in restorative success.
Limitations and Clinical Considerations
Digital workflows also introduce challenges:
Margin visibility remains essential. Poor tissue management can compromise scanning accuracy.
Learning curve exists for both scanning technique and digital design.
Equipment investment may be significant for practices adopting chairside systems.
Hybrid workflows — combining digital scanning with laboratory fabrication — are common and often provide a balance between efficiency and clinical precision.
Common Complications and Prevention
Complications in digital restorative workflows are often related to scanning errors or preparation design.
Incomplete margin capture may lead to marginal gaps. Ensuring proper isolation and gingival retraction improves scan accuracy.
Weak proximal contacts may occur if digital articulation or contact parameters are not carefully reviewed during CAD design.
Surface roughness or improper glazing can increase plaque accumulation and wear of opposing dentition.
Careful finishing, polishing, and occlusal verification reduce these risks.
Integrating Digital Dentistry into Clinical Workflow
Successful digital dentistry requires coordination between clinical technique and digital tools.
Clinicians must integrate:
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Retraction materials and tissue management tools
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CAD design software
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Milling or laboratory fabrication
Even in fully digital workflows, conventional dental instruments remain essential to preparation refinement, finishing, and occlusal adjustment.
Safco’s comprehensive catalog of diamond burs, polishing systems, retraction cords, bonding agents, resin cements, articulating papers, and finishing instruments supports efficient digital restorative workflows from preparation to final delivery.
FAQs
1. What is the main advantage of digital dentistry compared to traditional impressions?
Digital dentistry eliminates many sources of distortion associated with impression materials, improving accuracy while increasing patient comfort and reducing turnaround time.
2. Are digital impressions as accurate as conventional impressions?
When proper isolation and scanning technique are used, digital impressions can provide highly accurate restorations, particularly for single crowns and short-span prosthetics.
3. Can digital workflows produce same-day restorations?
Yes. Chairside CAD/CAM systems allow clinicians to scan, design, mill, and deliver certain restorations such as crowns, inlays, and onlays in a single appointment.
4. What materials are commonly used in digitally fabricated restorations?
Common materials include lithium disilicate ceramics, zirconia, and hybrid ceramic or composite blocks designed specifically for CAD/CAM milling.
5. Do digital restorations still require chairside adjustments?
Yes. Even with precise digital design, clinicians often refine occlusion, contacts, and surface polish using finishing burs, polishing systems, and articulating papers before final cementation.
