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Effects of rotary ultrasonic bone drilling on cutting force and temperature in the human bones.
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine ( IF 1.8 ) Pub Date : 2020-06-03 , DOI: 10.1177/0954411920925254
Ravinder Pal Singh 1 , Pulak Mohan Pandey 1 , Chittaranjan Behera 2 , Asit Ranjan Mridha 3
Affiliation  

Efficacy and outcomes of osteosynthesis depend on various factors including types of injury and repair, host factors, characteristics of implant materials and type of implantation. One of the most important host factors appears to be the extent of bone damage due to the mechanical force and thermal injury which are produced at cutting site during bone drilling. The temperature above the critical temperature (47 °C) produces thermal osteonecrosis in the bones. In the present work, experimental investigations were performed to determine the effect of drilling parameters (rotational speed, feed rate and drill diameter) and techniques (conventional surgical bone drilling and rotary ultrasonic bone drilling) on cutting force and temperature generated during bone drilling. The drilling experiments were performed by a newly developed bone drilling machine on different types of human bones (femur, tibia and fibula) having different biological structure and mechanical behaviour. The bone samples were procured from male cadavers with the age of second to fourth decades. The results revealed that there was a significant difference (p < 0.05) in cutting force and temperature rise for rotary ultrasonic bone drilling and conventional surgical bone drilling. The cutting force obtained in rotary ultrasonic bone drilling was 30%–40%, whereas temperature generated was 50%–55% lesser than conventional surgical bone drilling process for drilling in all types of bones. It was also found that the cutting force increased with increasing feed rate, drill diameter and decrease in rotational speed, whereas increasing rotational speed, drill diameter and feed rate resulted in higher heat generation during bone drilling. Both the techniques revealed that the axial cutting force and the temperature rise were significantly higher in femur and tibia compared with the fibula for all combinations of process parameters.



中文翻译:

旋转超声骨钻孔对人体骨骼切割力和温度的影响。

骨合成的功效和结果取决于多种因素,包括损伤和修复的类型,宿主因素,植入物材料的特性和植入类型。最重要的宿主因素之一似乎是由于在骨骼钻孔过程中在切割部位产生的机械力和热损伤造成的骨骼损伤程度。高于临界温度(47°C)的温度会在骨骼中产生热性骨坏死。在目前的工作中,进行了实验研究以确定钻孔参数(转速,进给速度和钻头直径)和技术(常规外科骨钻和旋转超声骨钻)对在骨钻过程中产生的切削力和温度的影响。钻探实验是通过新开发的骨骼钻探机对具有不同生物学结构和机械行为的不同类型的人体骨骼(股骨,胫骨和腓骨)进行的。骨骼样品是从第二到第四十年的男性尸体上购买的。结果表明存在显着差异(p  <0.05)在切削力和温升方面适用于旋转超声骨钻和常规手术骨钻。旋转超声骨钻中获得的切削力为30%–40%,而产生的温度比常规外科骨钻工艺在所有类型的骨中的钻削要低50%–55%。还发现切削力随着进给速度,钻头直径的增加和旋转速度的降低而增加,而旋转速度,钻头直径和进给速度的增加导致在骨钻孔过程中产生更高的热量。两种技术均表明,在所有工艺参数组合下,股骨和胫骨的轴向切削力和温度升高均明显高于腓骨。

更新日期:2020-06-03
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