Akça Kivanç, Chang Ting-Ling, Tekdemir Ibrahim, Fanuscu Mete I
Division of Restorative Dentistry, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA.
Clin Oral Implants Res. 2006 Aug;17(4):465-72. doi: 10.1111/j.1600-0501.2006.01265.x.
The objective of this biomechanical study was to explore the effect of bone micro-morphology on initial intraosseous stability of implants with different designs.
Straumann and Astra Tech dental implants were placed into anterior and posterior regions of completely edentulous maxilla and mandible of a human cadaver. Experiments were undertaken to quantify initial implant stability and bone micro-morphology. Installation torque values (ITVs) and implant stability quotients (ISQs) were measured to determine initial intraosseous implant stability. For quantification of relative bone volume and micro-architecture, sectioned implant-bone and bone core specimens of each implant placement site were consecutively scanned and trabecular bone was analyzed in a micro-computed tomography (micro-CT) unit. Experimental outcomes were evaluated for correlations among implant designs, initial intraosseous implant stability and bone micro-structural parameters.
ITVs correlated higher with bone volume fraction (BV/TV) than ISQs, at 88.1% and 68.9% levels, respectively. Correlations between ITVs and micro-morphometric parameters were significant at the 95% confidence level (P<0.05) while ISQs were not. Differences in ITVs, ISQs and BV/TV data in regards to implant designs used were not significant at the 95% confidence level (P>0.05).
Bone micro-morphology has a prevailing effect over implant design on intraosseus initial implant stability, and ITV is more sensitive in terms of revealing biomechanical properties at the bone-implant interface in comparison with ISQ.
本生物力学研究的目的是探讨骨微观形态对不同设计种植体初始骨内稳定性的影响。
将士卓曼和阿斯特拉·泰克牙科种植体植入一具人类尸体完全无牙的上颌骨和下颌骨的前部和后部区域。进行实验以量化初始种植体稳定性和骨微观形态。测量安装扭矩值（ITV）和种植体稳定性商数（ISQ）以确定种植体初始骨内稳定性。为了量化相对骨体积和微观结构，对每个种植体植入部位的种植体-骨切片和骨芯标本进行连续扫描，并在微型计算机断层扫描（micro-CT）设备中分析小梁骨。评估实验结果，以确定种植体设计、种植体初始骨内稳定性和骨微观结构参数之间的相关性。
ITV与骨体积分数（BV/TV）的相关性高于ISQ，分别为88.1%和68.9%。ITV与微观形态计量参数之间的相关性在95%置信水平（P<0.05）时显著，而ISQ则不显著。在95%置信水平（P>0.05）时，所使用的种植体设计在ITV、ISQ和BV/TV数据方面的差异不显著。
在种植体初始骨内稳定性方面，骨微观形态比种植体设计具有更显著的影响，并且与ISQ相比，ITV在揭示骨-种植体界面的生物力学特性方面更敏感。
