THE EFFECT OF SIMULATED FUNCTION ON THE RETENTION OF BAR-CLIP RETAINED REMOVABLE PROSTHESES

Patients wearing bar-clip retained removable prostheses may have loss of retention because of changes within the bar-clip assembly. This in vitro study recorded and compared the retention of one- and two-clip r etained simulated mandibular complete denture prostheses before and af ter simulated function, Cast metal Hader bars and clip holders were us ed to make 10 one-clip and 10 two-clip specimen pairs. Tensile removal values before and after simulated function were recorded and compared by repeated- measures analysis of variance and Student L tests (signi ficance level 0.05). The results revealed that the use of two clips in stead of one significantly increased retention of the simulated prosth esis. It was also found that there was a significant loss of retention after the specimens were placed on the bars and then removed once for both the one- and two clip groups. Simulated function did not cause a significant change in retention for either group.