Effect of cavity form on adhesion to cavity floor.

PURPOSE

To investigate the influence of cavity form, namely the C-factor, on adhesion at the interface on the cavity floor using light-cured resin-based composite.

METHODS

Black ABS resin molds were used and were formed into five types of cavities having configuration factors that ranged from 0.5 to 5.0. The cavity size was standardized to cubes of 5 x 5 x 5 mm. Each cavity was treated using a bonding system (Clearfil SE Bond) and was filled with resin-based composite (Clearfil Photo Core). The composite was irradiated in the cavity and then cured for 40 seconds using a halogen light unit. Specimens were subjected to the microtensile test at a cross-head speed of 1 mm/minute.

RESULTS

There was no significant difference in bond strength among the five different cavity forms. It was concluded that the difference of cavity forms had little effect on the adhesion to the cavity floor when using light-cured composites.