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Published on: July 21, 2014
Repair of silorane composite--using the same substrate or a methacrylate-based composite?
Annette Wiegand1, Bogna Stawarczyk, Wolfgang Buchalla
1Clinic for Preventive Dentistry, Periodontology and Cariology, University of Zurich, Plattenstrasse 11, CH-8032 Zurich, Switzerland. annette.wiegand@zzm.uzh.ch
Summary
Repairing aged silorane composite requires mechanical surface treatment. Using silane agent improves methacrylate-based composite repair strength, but not silorane composite repair strength.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Dental composites are susceptible to degradation over time.
- Repairing aged composites is crucial for longevity and function.
- Silorane-based composites offer alternative properties to traditional methacrylate-based composites.
Purpose of the Study:
- To evaluate the shear bond strength of aged silorane composite repaired with either silorane or methacrylate-based composite.
- To compare the efficacy of different surface treatments on repair bond strength.
- To investigate the role of silane application in the repair process.
Main Methods:
- Aged silorane composite specimens underwent thermal cycling.
- Surface treatments included diamond bur abrasion, sandblasting, silica coating, and hydrofluoric acid etching.
- Repair composites (silorane or nanofiller methacrylate) were bonded using various adhesive strategies, followed by shear bond strength testing.
Main Results:
- Most surface treatments yielded acceptable shear bond strength, except for hydrofluoric acid etching and diamond bur abrasion without silane for methacrylate repair.
- Silane application enhanced repair bond strength for methacrylate composites but not for silorane composites.
- Cohesive failures were more prevalent with silane application or silorane composite repair.
Conclusions:
- Silorane composite repair is feasible with both identical and conventional methacrylate-based composites.
- Mechanical surface preparation is essential for successful repair.
- Silanization is recommended for methacrylate-based composite repairs prior to adhesive application.
