Int J Oral Maxillofac Implants. 2014 Mar-Apr;29(2):456-61. doi: 10.11607/jomi.3357.
The aim of this study was to test the sensitivity of the resonance frequency analysis for detecting early implant failure.
In all, 3,786 implants placed from June 2007 to January 2013 were retrospectively evaluated. A total of 20 implants (in 20 patients) placed in pristine bone were found to have failed before loading. The implant stability quotient (ISQ) values were extracted from these 20 implants at baseline (immediate) and 4 months after placement (delayed). Simple linear regression, logistic regression, and two-way contingency tables were used to test for the relationships between ISQ values and early implant failure.
Immediate ISQ values were significantly related to failure (odds ratio [OR] = 4.27). Furthermore, the results of the second regression showed a significant relationship between ISQ at delayed measurement and implant failure (OR = 9.20). For immediate ISQ, it seems that the 73.7% correct classifications were obtained at the cost of an incorrect classification of 55% of the implant failures. However, for the delayed ISQ, 86.2% correct classifications were obtained at the cost of assuming that all implants will survive.
The present study showed that ISQ values are not reliable in predicting early implant failure. In addition, the real cutoff ISQ value to differentiate between success and early implant failure remains to be determined.
本研究旨在测试共振频率分析检测早期种植体失败的敏感性。
共回顾性评估了 2007 年 6 月至 2013 年 1 月期间植入的 3786 个种植体。在所有植入体中，发现 20 个植入体（20 名患者）在加载前失败，这些种植体均为初始骨植入。从这 20 个种植体中提取基线（即刻）和植入后 4 个月（延迟）的种植体稳定性指数（ISQ）值。采用简单线性回归、逻辑回归和双向列联表来检测 ISQ 值与早期种植体失败之间的关系。
即刻 ISQ 值与失败显著相关（比值比 [OR] = 4.27）。此外，第二次回归的结果表明，延迟测量时的 ISQ 值与种植体失败之间存在显著关系（OR = 9.20）。对于即刻 ISQ，似乎获得了 73.7%的正确分类，但错误地将 55%的种植体失败归类为失败。然而，对于延迟 ISQ，以假设所有种植体都将存活为代价，获得了 86.2%的正确分类。
本研究表明，ISQ 值不能可靠地预测早期种植体失败。此外，区分成功和早期种植体失败的实际 ISQ 值仍有待确定。
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