Assessment of two repairing techniques for a novel lithium disilicate based ceramic

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Abstract Background This research was done to evaluate the bond strength using two repair methods with lithium disilicate ceramic. Methods Cojet and Clearfil repair methods were used to repair lithium disilicate ceramic. The ceramic was sliced into slices before sintering (30 samples). Vita Ambria (Vita, Zahnfabrik, Germany) ceramic was used, surface treated with the 2 repair systems then bonded to composite. Samples are stored, thermocycling was done then shear loading was done until fracture. Bond strength values were collected and statistically analyzed. Results showed that the Cojet surface treatment showed significantly more bond strength (14.43 ± 1.46 Mpa) than the clearfil surface treatment showing (4.16 ± 1.33) as indicated by paired t-test p ≤ 0.05. Conclusions bond strength between composite and the ceramic Vita Ambria is better with using Cojet surface treatment than with using the clearfil system.

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