Aim of this study was to evaluate the effect of various surface treatments on the shear bond strength of old amalgam to newly condensed amalgam. 70 amalgam specimens were prepared and divided into seven groups. Group I: No surface treatment. Group II: Treatment with luting glass ionomer cement. Group III: Treatment with diamond bur. Group IV: Treatment with air abrasion. Group V: Treatment with adhesive resin. Group VI: Treatment with diamond bur + glass ionomer. Group VII: Treatment with diamond bur + adhesive resin. All the repaired specimens were subjected to shear bond testing. The results suggest that, Group VI had the highest bond strength and group I had the least. Bond strength of Group II was higher than group III (P=0.023) and IV (P<0.001) and lower than group VI (P<0.001) and VII (P=0.002). There was no significant difference between group II and V (P=0.650). Group III had higher bond strength than group IV (P<0.001) and lower than group VI and VII (P<0.001). There was no difference between group III and V (P=0.174). Group IV had lower bond strength than group V, VI and VII (P<0.001). Similarly, group V had lower bond strength than VI and VII (P<0.001). Among groups VI and VII, group VI had better bond strength (P=0.049). Clinical significance: Surface treatment of old amalgam restoration with the combination of diamond bur and luting glass ionomer can provide good shear bond strength to repaired amalgam.
|Number of pages||11|
|Journal||International Journal of Clinical Dentistry|
|Publication status||Published - 01-01-2015|
All Science Journal Classification (ASJC) codes