目的:评估具有扭矩控制的新型安装件用于拧紧Osstell®换能器的功效,并确定从放置在各种骨密度中的植入物记录的ISQ测量值的可靠性。材料和方法:56个植入物,包括七种不同的植入物类型,被放置在代表D1,D2,D3和D4骨密度的八个聚氨酯块中。共振频率分析(RFA)换能器以四种不同的方式连接到每个植入物:(a)手收紧,(b)使用SmartPegMount™手动拧紧,(c)使用具有扭矩控制的新型安装座(SafeMount)手动拧紧,以及(d)使用校准扭矩装置拧紧至6Ncm。进行ISQ测量,并且第二操作者重复测量。计算组内相关系数(ICC)以评估测量的可靠性,并采用线性混合效应回归来确定解释变量对ISQ值的影响。
结果:与校准扭矩装置p<.001,95%(-2.89,-1.21)相比,手动拧紧传感器获得的ISQ值在统计学上有显着差异,但在任何其他拧紧方法之间均无差异。两种RFA装置(ICC0.986)之间以及口腔和内侧测量(ICC0.977)之间存在极好的一致性。对于所有的换能器拧紧方法,在D1和D2中存在极好的操作者间一致性(ICC>0.8),但在D4中存在非常差的一致性(ICC<0.24)。骨密度占ISQ值变化的36%,植入物占11%,操作者占6%。
结论:SafeMount,与标准安装相比,没有显着提高RFA测量的可靠性,但是与手动拧紧传感器相比,校准扭矩装置似乎有好处。结果还表明,无论植入物的几何形状如何,在测量劣质骨骼中的植入物稳定性时应谨慎解释ISQ值。
To evaluate the efficacy of a novel mount with torque control for tightening of Osstell®
transducers and to determine the reliability of recorded ISQ measurements from implants placed in various bone densities. MATERIAL AND METHODS: Fifty-six implants, comprising seven different implant types, were placed in eight polyurethane blocks representing D1, D2, D3, and D4 bone densities. Resonance frequency analysis (RFA)
transducers were attached to each implant in four different ways: (a) hand tightening, (b) hand tightening with a SmartPeg Mount™, (c) hand tightening using the novel mount with torque control (SafeMount) and (d) tightening to 6 Ncm with a calibrated torque device. ISQ measurements were taken and a second operator repeated the measurements. Intraclass correlation coefficient (ICC) was calculated to assess the reliability of the measurements and linear mixed effects regression was employed to determine the effect explanatory variables had on ISQ values.
There was a statistically significant difference in ISQ values obtained by hand tightening
transducers compared to the calibrated torque device p < .001, 95%(-2.89, -1.21) but not between any other tightening methods. There was excellent agreement between the two RFA devices (ICC 0.986) and between buccal and mesial measurements (ICC 0.977). For all transducer tightening methods there was excellent inter-operator agreement in D1 and D2 (ICC > 0.8) but very poor agreement in D4 (ICC < 0.24). Bone density accounted for 36% of the variation in ISQ values, the implant for 11% and the operator for 6%.
SafeMount, did not significantly improve the reliability of the RFA measurements when compared to the standard mount, but calibrated torque devices seem to have benefits when compared to tightening the
transducers by hand. Results also indicate that the ISQ values should be interpreted with caution when measuring implant stability in poor quality bone regardless of the implant geometry.