Thermal change in a resin block during motorized and manual implant placement

Abstract

Statement of problemSeveral studies have demonstrated the harmful role of heat generation during implant site drilling in subsequent bone healing. However, heat generation during implant placement should also be carefully considered. PurposeThe purpose of this in vitro study was to evaluate thermal change in a resin block during motorized and manual implant placement with and without saline irrigation. Material and methodsThermocouple probes were placed in resin blocks to measure the thermal change during forty 3.75x15-mm self-tapping cylindrical screw implant placements as follows: MtI group, 10 motorized implant placements with external saline irrigation; MtNI group, 10 motorized implant placements without irrigation; MI group, 10 manual implant placements with external saline irrigation; MNI group, 10 manual implant placements without irrigation. The temperature values were recorded with a data acquisition system with a 20-channel multiplexer module connected to a personal computer. The normality of data distribution was assessed with the Shapiro-Wilk test and the homogeneity of variances with the Levene test. The mean temperatures of the groups was assessed with the 3-way ANOVA test followed by the Tukey HSD test for normal distribution and the Games-Howell test for non-normal distribution (α=.05). ResultsThe rate of temperature rise in the resin blocks was 1.1°C to 7.3°C. The highest mean temperature was present in the group for manual implant placement without irrigation (26.2 ±1.1°C), and the lowest thermal change was in the motorized implant placement group with external saline irrigation (23.6 ±1.0°C). ConclusionsThe thermal change in resin blocks during motorized implant placement was lower than manual implant placement, especially with external saline irrigation.