Abutment Modifications Guide for RPD Design
Discover techniques for modifying abutments to improve esthetics, eliminate interferences, and create undercuts if necessary. Learn about lowering and raising heights of contour, altering axial contours, preparing retention, and creating retentive preparations and undercuts.
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Presentation Transcript
Summary of Abutment Modifications After RPD Designed Guideplanes Lower heights of contour to eliminate interferences & improve esthetics Create undercuts if absolutely necessary (raising heights of contour) Rest seat preparation
Other Axial Contour Alterations Lowering Heights of Contour Rigid elements contacting abutments Improve esthetics Prepare guiding planes - most efficient method to lower
Other Axial Contour Alterations Raising Heights of Contour Insufficient retention in gingival 1/3 (at least 1mm from gingiva) Prepare undercut Add resin above to create undercut
Preparing Retention Axial surface must be close to parallel the path of insertion
Retentive Preparation Shape Follows the path of designed retentive tip
Creating Undercuts With Bonded Resins Axial surface must be close to parallel the path of insertion
VIDEOS Double Embrasure Rest Seats Retentive Undercuts On Your Own: Review Bonded Rest Seat
