Mouth Preparation in RPD
Mouth Preparation in RPD
Mouth Preparation in RPD
RPD
Presented by:
Parikshit Gupt
PG 2nd year
Dept of Prosthodontics
Himachal dental college, Sundernagar
CONTENTS
Introduction
Mouth preparation
Oral Surgical Preparation
Conditioning of Abused and Irritated Tissue
Periodontal Preparation
Preparation of abutment teeth
Conclusion
References
INTRODUCTION
restorative therapy
Objective: To return the health of supporting structures
follows
1. Removal & control of etiologic factors along with
3 Maintenance phase
Initial Disease Control Therapy
( Phase I)
Temporary splinting
Periodontal flaps
Treatment options:
Consider correction by shaping of enamel not exposing
dentine, while maintaining anatomy
More than 2 mm of enamel reduction should be restored
Extrude tooth may be shortened with endodontic therapy
Crown lengthening may ne required for sufficient height
of clinical crown to make to adequate retention
Infra occluded tooth should be restored to occlusion
Malaligned teeth should be corrected by orthodontics,
recontouring or placement of restoration.
Hopelessly extruded or mobile teeth may be reduced
to 2-3 mm above gingival level after endodontic
therapy to be used as overdenture abutments.
A weak 3rd molar make shaped and covered with
denture base fro vertical support
Removal of teeth should be last resort
Recontour proximal surfaces of
posterior teeth
Reduces undesirable undercut
Reduces proximal undercuts permitting closer
placement of minor connector
Reduces gingival embrasure space hence less food
enlodgement
Prepares vertically parallel guiding planes for a
direction of placement and removal of RPD
proximal guiding planes aid in stabilizing abutments
against lateral forces and RPD against horizontal
forces
Treatment :
Place the surveyed and designed diagnostic cast on the
surveying table at the correct tilt. Use it as a reference
for Correct orientation of the handpiece in the mouth.
Recontour proximal surfaces of
anterior teeth
Treatment option:
With a cylindrical smooth cut carbide bur recontour
proximal surface maintaining facial and lingual
surface
combination of tooth reduction and tilting the cast
in surveyor to change path of insertion establishes
Recontour facial and lingual
surfaces
Fabricate rest preparations
Fabricate rest preparations
Occlusal rest
Cingulum rest
Incisal rest
Cingulum rest seat
Composite Bonded Cingulum
Rests
direction