Overview: Find clinical indications, risks, cementation steps, and patient care instructions for Dandy PMMA (polymethyl methacrylate) temporary crowns.
PMMA temporary crown indications
Dandy PMMA temporary crowns provisionally restore worn, carious, broken, or aesthetically unpleasing teeth. These restorations are not intended for long-term use.
Clinical uses include:
Restoring single permanent teeth that are fractured, discolored, or severely worn.
Restoring single or multiple teeth that are implant-supported.
Providing an aesthetic and functional preview of final restorations.
Clinical contraindications and risks
Review these limitations before proceeding with PMMA temporary crown placement.
Contraindications:
Uncontrolled periodontal disease.
Severe bone resorption or active caries.
Active oral lesions.
Potential risks:
Localized tissue irritation or inflammation.
Potential for misfit, breakage, or recurrent caries.
Fit and cementation process
Follow these steps to ensure proper adaptation of the PMMA temporary crown.
Test fit: Check the PMMA temporary crown for aesthetics and marginal adaptation.
Adjust occlusion: Use articulating paper to identify high spots.
Refine margins: Reline the restoration with acrylic if necessary.
Clean restoration: Thoroughly clean the PMMA temporary crown before cementation.
Cement: Apply provisional cement to the PMMA temporary crown and seat it.
Remove excess: Clear excess cement once the material has fully set.
Adjustment and shaping guidelines
To prevent micro-fractures, use a high-speed handpiece with constant water and air spray.
Occlusal/Lingual surfaces: Use a football-shaped bur.
Buccal/Lingual surfaces: Use a tapered bur.
Finishing: Utilize a fine-grit diamond for all final adjustments.
Patient oral hygiene and diet
Advise patients on these maintenance steps to protect the PMMA temporary crown.
Daily cleaning:
Brushing: Use a soft-bristled toothbrush and fluoride toothpaste twice daily.
Flossing: Floss daily; use a floss threader for bridges, taking care not to dislodge the restoration.
Mouthwash: Avoid alcohol-based mouthwashes as they can increase plaque buildup.
Dietary restrictions:
Avoid sticky, hard, or crunchy foods that may loosen the restoration.
Limit sugary foods to prevent decay at the restorative margins.
Additional Information
- If the patient experiences any adverse events, such as pain or irritation, they should contact your practice immediately.
- Fixed restorations have a limited warranty, which may vary depending on the manufacturer.
- Smoking with restorations can cause discoloration
Disposal of PMMA materials
Do not place PMMA temporary crown waste in regular trash or medical waste streams.
Recycling: Utilize specialized dental waste handlers for chemical depolymerization.
Hazardous waste: If PMMA is mixed with solvents, follow specific hazardous waste protocols.