The effectiveness of carbide fissure bur in cutting dentin with light, moderate and heavy work load

الملخص EN

Background : the dentist believes that pressing harder on the tooth enhances the cutting effectiveness of the bur performance.

The aim of the study: was to evaluate the effectiveness of carbide fissure bur in cutting dentin with light, moderate and heavy work load.

Materials and Methods : the cutting of carbide bur under different work load was evaluated on dentin specimens mounted in acrylic blocks.

Group I : Cutting performed with light work load ( = 25g), Group II : Cutting performed with moderate work load (=100g), Group III: Cutting performed with heavy work load ( = 175g).

Ten cuts were performed with each work load and atotal of 30 cutting rates or CRs (mm / sec.) were recorded and were statistically analyzed using analysis of variance (ANOVA) test, student t-test.

Results : A significant difference (P < 0.5) appeared between CRs of group I and III, and between group II and III.

Conclusion : the effectiveness of carbide fissure bur in cutting dentin markedly reduced with heavy work load.