Natali C, Ingle P, Dowell J
Broomfield Hospital, Chelmsford, England.
J Bone Joint Surg Br. 1996 May;78(3):357-62.
We studied the various drill bits available for engineering purposes, and compared them with standard orthopaedic drill bits, using continuous temperature recording at 0.5 mm, 1.0 mm and 1.5 mm from the edge of a 2.5 mm hole as it was drilled in fresh cadaver human tibia. We found that some commercially available drill bits performed better than their orthopaedic equivalents, producing significantly less thermal injury to the surrounding bone and halving the force required for cortical penetration. Our work suggests that the optimal bit for orthopaedic purposes should have a split point and a quick helix. Theoretical knowledge of cutting technology predicts that the addition of a parabolic flute will further reduce thermal damage. Further work is being done on other drill sizes used in orthopaedic practice and on new custom-designed bits.
我们研究了各种用于工程目的的钻头，并将它们与标准骨科钻头进行比较，在新鲜尸体人胫骨上钻一个2.5毫米的孔时，在距孔边缘0.5毫米、1.0毫米和1.5毫米处连续记录温度。我们发现，一些市售钻头的性能优于同类骨科钻头，对周围骨骼产生的热损伤明显更小，皮质穿透所需的力减半。我们的研究表明，骨科手术的最佳钻头应具有分裂点和快速螺旋。切削技术的理论知识预测，添加抛物线形凹槽将进一步减少热损伤。目前正在对骨科手术中使用的其他钻头尺寸以及新的定制设计钻头进行进一步研究。
