Modified Reverse Scan Technique for Abutment Teeth

Area of Science:

• Dental Technology
• Prosthodontics
• Digital Dentistry

Background:

• Fabricating extensive tooth-supported prostheses digitally can lead to inaccuracies.
• Stitching and merging errors are common in long-span intraoral scans.
• Current digital workflows may not fully optimize accuracy for complex restorations.

Purpose of the Study:

• To introduce a modified reverse scan technique for abutment teeth.
• To integrate laboratory scanners into a fully digital workflow.
• To enhance the accuracy of virtual definitive casts for extensive prostheses.

Main Methods:

• A modified reverse scan technique using laboratory scanners and a 3D-printed interim prosthesis.
• The interim prosthesis is sectioned and bonded intraorally.
• Scanning of the sectioned interim prosthesis to create an improved virtual definitive cast.
• Utilizing free software for the modification process.

Main Results:

• Reduced impact of stitching and merging errors in long-span scans.
• Enhanced accuracy of the virtual definitive cast.
• A cost-effective and time-saving procedure for digital prosthodontic workflows.

Conclusions:

• The modified reverse scan technique offers a versatile and accurate solution for digital fabrication of extensive tooth-supported prostheses.
• Integrating laboratory scanners with 3D-printed interim restorations improves digital cast quality.
• This method provides a practical enhancement to current digital dentistry protocols.