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Does MTA affect fiber post retention in repaired cervical root canal perforations?
Rodrigo Dantas Pereira1, Manoel Brito-Júnior2, André Luis Faria-E-Silva3
1Universidade de São Paulo, Universidade de São Paulo, Dental School of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto SP , Brazil, Universidade de São Paulo - USP, Dental School of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil.
Mineral Trioxide Aggregate (MTA) negatively impacts fiber post retention in repaired root canal perforations. Self-adhesive resin cements offered better bond strength compared to self-etching cements in these challenging cases.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Root canal perforations are common endodontic complications.
- Mineral Trioxide Aggregate (MTA) is frequently used for perforation repair.
- Fiber post retention is crucial for the success of coronal restoration after endodontic treatment.
Purpose of the Study:
- To evaluate the effect of MTA on the retention of fiber posts.
- To compare the bond strength of different resin cements in MTA-repaired perforations.
Main Methods:
- Sixty bovine incisors with prepared post spaces underwent cervical perforation repair with MTA.
- Fiber posts were luted using two self-adhesive (RelyX Unicem, Set) or one self-etching (Panavia F) resin cement.
- Pull-out tests were performed to assess post retention, followed by statistical analysis (two-way ANOVA, Tukey's test).
Main Results:
- Fiber post retention was significantly reduced in MTA-repaired perforations (p < 0.001).
- Self-adhesive resin cements (RelyX Unicem, Set) demonstrated higher bond strength than the self-etching cement (Panavia F).
- No significant difference in bond strength was found between the two self-adhesive cements.
Conclusions:
- MTA negatively influences the retention of fiber posts in repaired root canal perforations.
- Self-adhesive resin cements appear to be a more favorable choice for luting fiber posts in endodontically treated teeth with MTA repair.
