Karl Matthias, Graef Friedrich, Heckmann Siegfried, Krafft Tim
Department of Prosthodontics, University of Erlangen-Nuremberg, Erlangen, Germany.
Clin Oral Implants Res. 2008 Feb;19(2):214-8. doi: 10.1111/j.1600-0501.2007.01462.x. Epub 2007 Dec 6.
There is no proven clinical tool to evaluate the amount of osseointegration and stability around dental implants. Therefore, the aim of this retrospective clinical study was to evaluate resonance frequency analysis values of 385 ITI solid screw implants.
Both at implant placement and after healing, implant stability quotients (ISQs) were determined. For statistical analysis, Pearson's correlation coefficients, Welch's two-sample t-tests and paired samples t-tests were computed at a level of significance of alpha=0.05.
ISQ values ranged from 39 to 86 at implant placement and from 35 to 89 after healing, showing a significant increase. The highest ISQ values at both stages were obtained in the posterior mandible (P < or = 0.002). After healing, ISQ values in the anterior mandible were significantly higher than in the anterior maxilla (P=0.005). Implant length had a significant influence on ISQ in the anterior mandible (P=0) at insertion and in the anterior (P=0.005) and posterior mandible (P=0.036) after healing. Implant diameter and ISQ at insertion correlated in the anterior mandible (P=0.037). After healing, a significant influence was found for all regions, except the posterior maxilla (P=0.795). With the exception of the anterior maxilla (P=0.542), ISQ at placement had a significant influence on ISQ after healing. In the anterior maxilla (P=0.002) and in the posterior mandible (P=0.007), healing time significantly influenced ISQ after healing.
It appears that only repeated ISQ measurements of a specific implant have some diagnostic benefit, although the parameters influencing the absolute values still remain unclear.
目前尚无经证实的临床工具可用于评估牙种植体周围的骨结合量和稳定性。因此，本回顾性临床研究的目的是评估385枚ITI实心螺钉种植体的共振频率分析值。
在种植体植入时和愈合后均测定种植体稳定性商数（ISQ）。进行统计分析时，计算了Pearson相关系数、Welch两样本t检验和配对样本t检验，显著性水平为α=0.05。
种植体植入时ISQ值范围为39至86，愈合后为35至89，显示出显著增加。两个阶段中最高的ISQ值均出现在下颌后部（P≤0.002）。愈合后，下颌前部的ISQ值显著高于上颌前部（P=0.005）。种植体长度在植入时对下颌前部的ISQ有显著影响（P=0），愈合后对下颌前部（P=0.005）和下颌后部（P=0.036）的ISQ有显著影响。种植体直径与下颌前部植入时的ISQ相关（P=0.037）。愈合后，除上颌后部外（P=0.795），在所有区域均发现有显著影响。除上颌前部外（P=0.542），植入时的ISQ对愈合后的ISQ有显著影响。在上颌前部（P=0.002）和下颌后部（P=0.007），愈合时间对愈合后的ISQ有显著影响。
似乎只有对特定种植体重复进行ISQ测量才有一定的诊断价值，尽管影响绝对值的参数仍不清楚。
