Bachus K N, Rondina M T, Hutchinson D T
University of Utah School of Medicine, Department of Orthopedics and Orthopaedic Bioengineering Research Laboratory, 20 South 2030 East, Room 190BPR, University of Utah, Salt Lake City, UT 84112, USA.
Med Eng Phys. 2000 Dec;22(10):685-91. doi: 10.1016/s1350-4533(01)00016-9.
Bone loss due to thermonecrosis may weaken the purchase of surgically placed screws and pins, causing them to loosen post-operatively. The goal of this study was to determine how differences in applied drilling forces affect the temperature of cortical tissue near the drilling site. Results from thermocouples placed into fresh cortical bone indicate that increasing the applied drilling force resulted in a significant decrease (P=0.001) of maximum cortical temperatures. Furthermore, increasing the drilling force resulted in a significant decrease (P=0.001) in the average duration of temperature elevations above 50 degrees C. The results of the current study demonstrate that by the application of a larger force to the drill, both maximum cortical temperatures and their duration above 50 degrees C may be effectively reduced, decreasing the potential for thermal necrosis in the neighboring cortical bone.
热坏死导致的骨质流失可能会削弱手术植入螺钉和钢针的固定力，导致它们在术后松动。本研究的目的是确定施加的钻力差异如何影响钻孔部位附近皮质组织的温度。置于新鲜皮质骨中的热电偶结果表明，增加施加的钻力会导致皮质最高温度显著降低（P = 0.001）。此外，增加钻力会导致温度高于50摄氏度的平均持续时间显著减少（P = 0.001）。当前研究结果表明，通过对钻头施加更大的力，可以有效降低皮质最高温度及其高于50摄氏度的持续时间，减少相邻皮质骨发生热坏死的可能性。
