Optimizing Preparations & Gingival Retraction for Scanning
- Estimated Time: 60 min
- Credits: 1.0 CEU
- Passing Score: 70%
Course Overview
The success of any CAD/CAM restoration depends heavily on how well a preparation is designed and how effectively the surrounding gingival tissue is managed during scanning. This course examines why intraoral scanners require specific preparation geometry, and why margins, taper angles, and internal line angles that work well for analog impressions may not translate to accurate digital scans and properly milled restorations.
Participants will review detailed preparation guidelines for posterior, anterior, onlay, inlay, and veneer restorations, along with the mechanical, chemical, and surgical techniques used to retract or trough gingival tissue for clear margin visibility. By understanding these clinical fundamentals, dental professionals can improve the accuracy, fit, and predictability of their digitally fabricated restorations.
Learning Objectives
After completing this course, participants will be able to:
- Explain why preparation design and gingival retraction are critical factors in the success of CAD/CAM restorations.
- Identify the margin types, exit angles, and internal angle requirements that produce optimal results with intraoral scanning and milling.
- Describe preparation guidelines for posterior, anterior, onlay, inlay, and veneer restorations intended for digital scanning.
- Compare mechanical, chemical, and surgical techniques for gingival tissue management, including retraction cords, pastes, chemical agents, and laser troughing.
- Recognize how improper preparation design or inadequate tissue retraction can compromise digital impression accuracy and restoration fit.
This course is members-only
Please purchase the course or sign in to your account to access the full content and quiz.