Repair Of Fractured Denture Introduction
Complete denture fracture is frequently encountered problem. The fracture results due to sudden drop of denture by patient during removal or washing. Fractured denture is repaired using autopolymerizing acrylic resin.
Table of Contents
Repair of fracture denture involves mainly two steps:
- Preparation of working cast.
- Repair of fracture denture.
Preparation Of Working Cast
Fracture maxillary and mandibular dentures at midline.
Read and Learn More: Preclinical Prosthodontics Notes
Step 1:
Assemble the fracture segments of denture at fracture line and add drop of cyanoacrylate to temporarily hold them together.
Step 2:
Use wooden toothpicks or matchsticks to stabilize fragments of fracture denture. Place toothpicks on occlusal surface and seal them with sticky wax.
Step 3:
If any undercut is present block it with modeling wax and apply petroleum jelly all over the tissue surface.
Step 4:
Mix dental plaster in creamy consistency and pour it on tissue surface till the height of borders. Pour remaining plaster on tile and invert the denture on it to form the working cast. Do not cover borders on polished surface. Make adequate thickness of base of the working cast. Allow plaster to set completely. Once it is set, remove the denture from the cast for repair.
Repair Of Fracture Denture
Step 1:
Remove toothpicks or matchsticks. Separate the fracture components. Trim the fracture edges by 2 mm and form the bevel for proper adaptation of acrylic resin. This is done to create space to fill repair resin and join the fracture components.
Make grooves on lingual surface of mandibular denture. The grooves should cross the fracture line. Place wrought wire in the grooves. The wire is used to reinforce the broken denture. For maxillary denture, make dumbbellshaped grooves along the fracture line.
Step 2:
Apply cold mould seal on working cast in the region of fracture. Use unidirectional strokes. Allow it to dry completely. Place the components of denture on the working cast. Mix polymer and monomer in porcelain jar in proportion of 3:1 by volume. Pour the mixed resin in fluid state in fracture site from both labial and lingual side. Allow it to polymerize completely.
Remove the denture from the working cast. Trim the excess resin from labial and lingual side using acrylic trimmer and do finishing with sand paper or emery paper. Polish it using pumice and rag wheel.
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