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Summary of Abutment Modifications

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 .

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Summary of Abutment Modifications

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  1. 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

  2. Other Axial Contour Alterations • Lowering Heights of Contour • Rigid elements contacting abutments • Improve esthetics • Prepare guiding planes - most efficient method to lower

  3. 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

  4. PreparingRetention • Axial surface must be close to parallel the path of insertion

  5. Retentive Preparation Shape • Follows the path of designed retentive tip

  6. Creating Undercuts With Bonded Resins • Axial surface must be close to parallel the path of insertion

  7. Videos • Double Embrasure Rest Seats • Retentive Undercuts • On Your Own: Review Bonded Rest Seat

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