Faculty of Dentistry, Department of Periodontology, Cukurova University, Turkey.
Faculty of Dentistry, Department of Maxillofacial Surgery, Cukurova University, Turkey.
J Oral Implantol. 2022 Feb 1;48(1):3-8. doi: 10.1563/aaid-joi-D-20-00228.
The aim of this study was to measure the effect of drilling speed on heat generation in the cortical bone, on primary and secondary implant stability of implants and on early and late bone healing with micro-computerized tomography (micro-CT). Sixty implants were placed in the iliac crest of 6 sheep in order to form 5 different drilling protocols: 50 rpm without saline cooling, and 400, 800, 1200, and 2000 rpm with saline cooling. Simultaneous cortical bone temperature and primary stability at the time of placement; secondary stability and the ratio between relative bone and tissue volume (BV/TV) in 2D and 3D in micro-CT analysis were evaluated after 4 and 8 weeks. The 50-rpm group had the highest cortical bone temperature and the longest operation duration with the highest primary stability. Slightly higher values of secondary stability (T2) and subsequent 2D and 3D BV/TV values were found in 1200 rpm with irrigation at 8 weeks. All groups had sufficient ISQ values at 8 weeks for loading although the micro-CT analysis showed varying percentages of bone tissue around implants. The influence of drill speed for implant osteotomy and its irrigation is minimal when it comes to changes in temperature of the cortical bone, primary and secondary implant stability, and BV/TV.
本研究旨在通过微计算机断层扫描（micro-CT）测量钻速对皮质骨产热、种植体初级和次级稳定性以及早期和晚期骨愈合的影响。为了形成 5 种不同的钻孔方案，在 6 只绵羊的髂嵴中植入 60 个种植体：50rpm 不使用盐水冷却，以及 400、800、1200 和 2000rpm 使用盐水冷却。在放置时同时评估皮质骨温度和初级稳定性；在第 4 周和第 8 周时，通过 micro-CT 分析评估次级稳定性和相对骨与组织体积（BV/TV）的比值（2D 和 3D）。50rpm 组皮质骨温度最高，手术时间最长，初级稳定性最高。在 8 周时，在灌溉的情况下，1200rpm 组的次级稳定性（T2）和随后的 2D 和 3D BV/TV 值略高。尽管 micro-CT 分析显示种植体周围的骨组织百分比不同，但所有组在第 8 周时的 ISQ 值均足以进行加载。当涉及到皮质骨温度、初级和次级种植体稳定性以及 BV/TV 的变化时，钻头速度对种植体截骨及其冲洗的影响很小。
