Laboratory evaluation of shear bond strength of porcelain repair methods

Laboratory evaluation of shear bond strength of porcelain repair methods

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Introduction: Porcelain fracture is a relatively common problem in clinical dental practice.Various methods have been proposed for repairing porcelain fractures including direct composite resin repair or construction of a porcelain laminate veneer and its cementation with a resin cement.Evaluation of shear bond strength of porcelain repair methods was the purpose of this study.Methods: Twenty feldspathic porcelain discs read more (10 mm in diameter) were fabricated.The samples underwent air-born abrasion with an aluminum oxide and etching with HF, and were then ultrasonically cleaned and randomized into two groups: 1- repair with porcelain disc (7 mm in diameter) with light cure cement (Choice 2) and 2- repair with resin composite (Clearfil AP-X).

We measured the shear bond strength of the samples by Zwick Roll at 0.5 mm/min crosshead speed. Results: The resin composite group had the highest shear bond strength (12.91 MPa).We found no significant differences between the choice and composite groups (p=0.

970).Conclusions: Our findings indicate here that resin composite yields acceptable shear bond strength to be used in porcelain repair.