Abstract
Purpose : The purpose of this study was to evaluate the performance efficiency of two different drill combinations according to the heat generated and drilling time.
Materials and methods : In this study, cow ribs were used as research materials. To test the specimen, cow bones were rid of fascia and muscles, and a temperature sensor was mounted around the drilling area. The experimental group was divided into a group using a guide drill and a group using a Lindmann drill according to the drill used before the initial drilling. The drilling sequence of the guide drilling group is as follows; guide drill (©ª 2.25), initial drill (©ª 2.25), twist drill (©ª 2.80), and twist drill (©ª 3.20). The drilling sequence of the Lindmann drilling group is as follows; Lindmann drill (©ª 2.10), initial drill (©ª 2.25), twist drill (©ª 2.80), and twist drill (©ª 3.20). The temperature was measured after drilling. For statistical analysis, the difference between the groups was analyzed using the Mann-Whitney U test and the Friedman test was used (¥á = .05).
Results : The average performance efficiency for each specimen of guide drilling group ranged from 0.3861 to 1.1385 mm3/s and that of Lindmann drilling group ranged from 0.1700 to 0.4199 mm3/s. The two drill combinations contained a guide drill and Lindmann drill as their first drills. The combination using the guide drill demonstrated excellent performance efficiency when calculated using the drilling time (P < .001).
Conclusion : Since the guide drill group showed better performance efficiency than the Lindmann drill group, the use of the guide drill was more suitable for the primary drilling process.
Keyword : Dental implants; Efficiency; Implant handpiece; Temperature change
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