- Add summary of causes of pain !
- Steps and post-op for insertions !
| Type of Repair | Methods Described |
|---|
| Fractured Denture Base |
Method 1 (Quick Repair):
- Precisely reassemble the broken pieces and hold them together with cyanoacrylate glue.
- Roughen the polished surface over the fracture and apply self-curing repair resin over the area.
- Once set, invert the denture and cut a deep trough along the fracture line on the intaglio surface with a bur.
- Flow acrylic repair resin into the trough and cure the denture in a pressure pot.
- Trim and polish the repaired surfaces.
Method 2 (Cast-Based Repair):
- Assemble the pieces with cyanoacrylate glue or sticky wax.
- Block out undercuts on the fitting surface with wax and pour a stone cast into the denture.
- Remove the denture from the cast. Taper and roughen the edges of the fracture line to increase the bonding surface area.
- Paint the cast with a separating medium, apply self-curing acrylic to the fracture area, and cure the denture on the cast in a pressure pot.
- Trim and polish the denture.
|
| Broken or Missing Tooth |
Procedure:
- Use a bur to cut away the denture base from behind and below the tooth position.
- Retain as much of the labial.
|
| Procedure Type | Materials Used | Technique Summary (Numbered Steps) | Expected Service Life |
|---|
| Chairside, Soft Reline |
- Self-curing plasticised acrylic
- Examples: Ufi Gel Soft, GC ReLine Soft (cartridge dispensers), CoSoft (powder/liquid)
|
Technique (Ufi Gel Example):
- Clean and dry the intaglio surface of the denture.
- Apply an adhesive to the intaglio surface and allow it to become tacky.
- Extrude the soft liner material from the mixing nozzle directly onto the denture.
- Seat the denture in the mouth. The patient applies light biting force to ensure correct occlusion until the material sets.
- Trim away excess material after setting.
| Short-term use only (~ 6 weeks). |
| Chairside, Hard Reline |
- Self-curing acrylic resin
- Examples: Ufi Gel Hard, GC Reline Material, Co-rect (all powder/liquid)
- Teflon tape
|
Technique:
- Reduce the base by grinding away a thin layer of the intaglio surface with an acrylic bur to create a fresh bonding surface.
- Apply Teflon tape to the polished surfaces to make cleanup easier.
- Mix the material to a creamy consistency and apply it in an even layer to the intaglio surface.
- Seat the denture and have the patient close into even occlusal contact under light pressure.
- Gently muscle-mold the peripheries while the material sets, ensuring the denture remains in occlusion.
- Remove the denture from the mouth once the material becomes rubbery (as the reaction is exothermic) and allow it to finish setting on the bench.
- Trim gross excess with curved scissors while it is rubbery. Once fully set, smooth it with an acrylic bur and polish it with a rubber point.
| ~ 6 months. |
| Laboratory, Soft Reline |
- Usually a heat-cured silicone
- Example: Molloplast B
|
Technique (Molloplast B Example):
- The material is a heat-cured silicone.
- It is processed to an even layer of about 2-3 mm.
- The process requires a more sophisticated, two-stage curing technique.
| ~ 3 years. |
| Laboratory, Hard (Reline and Rebase) |
- Usually a heat-cured polymethyl methacrylate (PMMA)
- Impression Materials: CoSoft, Polyether, or PVS
- Type IV stone
- Laboratory putty (for rebase)
|
Reline Procedure:
- Make an impression using the denture as a tray.
- Pour a Type IV stone cast into the impression.
- Flask the denture and cast.
- Open the flask, apply separating medium to the cast, and apply PMMA dough to the cleaned intaglio surface of the denture.
- Heat-process the denture, then deflask, trim, and polish.
Rebase Procedure:
- Reduce the intaglio surface and make a tissue surface impression in the denture. Pour a stone cast.
- Place the denture and cast in a split flask.
- Adapt a layer of laboratory putty to the labial and buccal surfaces of the teeth (but not the occlusal or incisal surfaces).
- Assemble and pour the flask.
- After the stone sets, open the flask and remove the denture.
- Cut away all of the old denture base, leaving only a small horseshoe of material retaining the teeth in their correct relationship.
- Clean the cast, pack the denture with new PMMA, and process it in the usual way.
|
Reline: Lasts longer (than chairside options).
Rebase: Lasts even longer (than a lab reline); it is the longest-lasting option.
|