Fabrication Of Removable Partial Denture Introduction
Complete denture is fabricated to replace all missing teeth and associated structures. Removable partial denture is fabricated to restore partially edentulous arches. The basic procedures and principles for fabrication of removable partial denture are similar to that of complete denture. In this chapter, the fabrication of removable partial denture is given in brief.
Table of Contents
Fabrication Of Record Based On Maxillary And Mandibular Partially Edentulous Casts
Step 1:
Mark the height of contour with pencil. Draw the outline for partial denture.
Read and Learn More: Preclinical Prosthodontics Notes
Step 2:
Mark outline for making record base. Apply cold mould seal on the edentulous area and interdental areas. Apply it on lingual surface of remaining teeth on the cast. Allow it to dry.
Step 3:
Make record base with self-cure acrylic resin. Cover the remaining teeth on cast till the
height of contour. Retrieve the record base slowly from the cast. Trim the excess acrylic resin from borders and smoothen the borders. Extend the mandibular record base till the retromolar pads bilaterally.
Fabrication Of Occlusion Rims
Step 1:
Soften the wax sheet on Bunsen burner and fold it to make a roll of it. Take care not to entrap the air while making the wax roll.
Step 2:
Cut the wax roll according to the length of the edentulous span. Adapt the wax roll on denture base in edentulous area. Heat the wax knife and seal the wax on the record base.
The height is adjusted according to remaining natural teeth on the cast using hot plate. Anteriorly keep the width around 5–7 mm. Place it slightly labially. Posterior width is kept 8–10 mm.
Mounting Of Casts On Articulator
Step 1:
Place the maxillary and mandibular casts together. The remaining teeth on each cast should be in occlusion with teeth on opposite cast. Do indexing on the base of the casts before mounting.
Step 2:
Articulate the casts on mean value articulator following the steps used for mounting the complete denture casts.
Teeth Arrangement And Wax Up Procedure
Select the proper size of artificial teeth. Arrange the teeth on occlusion rim according to steps followed for arrangement of artificial teeth for complete denture. Make sure that artificial
teeth are arranged with proper overjet and overbite along with proper occlusal contacts. Do the wax up according to the steps followed for complete denture wax up procedure.
Processing Of Removable Partial Denture
The flasking is done according to the standard procedure used for complete denture.
Select appropriate flasks. Pour creamy mixture of investing plaster on base of the flask and place cast in the center. Keep occlusal plane parallel to the base of the flask. Make sure that there is no undercut in first pour. Make it sloping toward the rim of the flask. Heal of the mandibular cast should be at 45°.
Note: Cover the remaining natural teeth on cast withplaster of first pour. This is done to eliminate undercuts created due to inclination of teeth.
Apply separating medium in unidirectional manner. Pour the second pour till the incisal edges and occlusal surfaces. Mix dental plaster and pour the third pour. Place the flasks on clamps and tighten them completely. Wax elimination is done by following the steps for complete denture wax elimination procedure.
Pack acrylic resin in dough stage and proceed for acrylization procedure. Remove flask after acrylization and open them to retrieve cured partial denture. Carefully retrieve the removable partial dentures from flasks. Trim excess material from borders and peripheries.
Finishing of removable partial denture is done using sand paper and emery paper. Polishing (pumicing) is done using pumice powder or pumice cake. Use rag wheel to polish palatal surface of maxillary partial and lingual surface of mandibular partial denture. Use clean cotton buff or rag wheel without pumice to give final polishing and shine. This will remove any pumice present on surface.
Clean the partial denture with soap water to remove any residual polishing agent from polished surface.
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