Heat Generation on Implant Surface During Abutment Preparation at Different Elapsed Time Intervals.

PURPOSE: The purpose of this study was to evaluate heat generation at the implant surface caused by abutment preparation using a diamond bur in a high-speed dental turbine in vitro at 2 different water-coolant temperatures. MATERIALS AND METHODS: Thirty-two titanium-alloy abutments were connected to a titanium-alloy implant embedded in an acrylic resin placed within a water bath at a controlled temperature of 37 degrees C. The specimens were equally distributed into 2 groups (16 each). Group 1: the temperature was maintained at 20 +/- 1 degrees C; and group 2: the temperature was maintained at 32 +/- 1 degrees C. Each abutment was prepared in the axial plane for 1 minute and in the occlusal plane for 1 minute. The temperature of the heat generated from abutment preparation was recorded and measured at 3 distinct time intervals. RESULTS: Water-coolant temperature (20 degrees C vs 32 degrees C) had a statistically significant effect on the implant's temperature change during preparation of the abutment (P < 0.0001). CONCLUSION: The use of water-coolant temperature of 20 +/- 1 degrees C during preparation of the implant abutment decreased the temperature recorded at the implant surface to 34.46 degrees C, whereas the coolant temperature of 32 +/- 1 degrees C increased the implant surface temperature to 40.94 degrees C.