The effect of amalgam condensation techniques on the tensile bond strength using different dentin adhesives : in vitro study

الملخص EN

Background : the purpose of this in vitro study was to assess the effect of the condensation techniques of the amalgam on the tensile bond strength of the amalgam to dentin.

Materials and Methods : the occlusal enamel surfaces of the teeth were ground flat to exposed the dentin surfaces, and polished with 600-grit SiC papers.

The dentin surfaces were treated with one of the combinations of dentin bonding agents and condensation techniques.

The tensile bond strengths were determined with a Zwick Universal Testing Machine.

Results : statistical analysis of the result revealed that for the scotchbond Multi-Purpose adhesive and the control groups, hand condensation was better and the difference was highly significant (p < 0.01) while for the Syntac singlecomponent adhesive group , the mechanical condensation performed better and the difference was highly significant ( p < 0.01).

For both types of condensation techniques, the Syntac single-component showed higher tensile bond strength values than that of both Scotchbond Multi-Purpose and control groups (p < 0.01).

The Scotchbond Multi-Purpose showed higher tensile bond strength values than that on the control groups and the difference was highly significant (p < 0.01).

Conclusions : for both types of condensation techniques, Syntac single-component performed the best in bonding the amalgam to dentin.

The two types of condensation techniques had different effect on the tensile bond strengths of the amalgam to dentin using the dentin bonding agents.