Journal
JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
Volume 64, Issue 2, Pages 265-269Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.joms.2005.10.011
Keywords
-
Categories
Ask authors/readers for more resources
Purpose: The goal was to measure heat generated in bone by 3 implant drill systems after repeated drilling and sterilization. Materials and Methods: Temperature was measured with thermocouple technology in vitro using the bovine femoral cortical bone model. Intermittent drilling was accomplished at a constant 2.4-kg load and drill speed of 2,500 rpm. External irrigation at 40 mL/min with normal saline was used. Three implant drill systems-system A (triple twist drills with a relief angle), system B (triple twist drills without a relief angle), and system C (double twist drills with a relief angle)-were evaluated and heat was measured at the final drill in the drilling sequence (4.0 turn or 4.2 mm) at a depth of 15 mm. Thermocouples were placed 0.5 mm from the osteotomy at a depth of 15 ram. Heat measurements were recorded out to 25 uses. Results: Results showed temperature increased with multiple uses. System A and C drills had temperature measurements that were below 47 degrees C, even after 25 uses. System B drills had temperatures that exceeded 47 degrees C from the initial use. Light microscopy showed little drill wear even after 25 uses. Conclusions: Drill geometry plays a major role in heat production and may explain the increased temperature readings seen in System B. These drills lack relief angles and have the smallest clearance angles of the 3 systems. It also has fewer drills in its drilling sequence compared with systems A and C. This study shows that temperatures increase when drills are used multiple times. Systems A and C had acceptable temperature measurements out to 25 uses. System B drills showed significantly higher heat production with little visual signs of wear, (c) 2006 American Association of Oral and Maxillofacial Surgeons.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available