Zix Jürgen, Kessler-Liechti Gerda, Mericske-Stern Regina
Departments of Prosthodontics and Maxillofacial Surgery, School of Dental Medicine, University of Bern, Bern, Switzerland.
Int J Oral Maxillofac Implants. 2005 Sep-Oct;20(5):747-52.
The objective of the present study was to determine standard Implant Stability Quotient (ISQ) values for apparently successfully osseointegrated 1-stage implants in the maxilla.
To measure implant stability, resonance frequency analysis (RFA) was performed in 35 patients (18 women, 17 men) with a total of 120 maxillary ITI implants. Based on the time interval between implant placement and measurements, the ISQ values of anterior and posterior implants were divided into subgroups: unloaded (n = 41), loaded < or = 12 months (n = 31), and loaded > 1 year (n = 48). Statistical analysis was performed using a mixed-effects model with the variables lading, implant location, and gender as fixed effects.
The mean ISQ of all measured implants was 52.5 +/- 7.9 (range 40 to 68). Statistical analysis showed no significant differences in ISQ values between the 3 tested time intervals: unloaded (48.8 +/- 3.6), loaded < or = 12 months (54.1 +/- 7.0), and loaded > 1 year (53.1 +/- 9.5). Neither for the location in the jaw nor for bone quality (assessed using radiographs) could a significant difference be found. Gender was the only parameter which was found to be significant (P < .003); on average, men showed higher implant stability than women (56.3 +/- 6.6 versus 48.7 +/- 7.4).
Standard values for osseointegrated maxillary ITI implants exhibited an individual range. Single RFA measurements of an implant do not allow assessment of its current status or prediction of its performance. Repeated measurements over a longer time period would be necessary.
No significant differences in ISQ values were found between implants with regard to loading period or location in the jaw. Postmenopausal women exhibited significantly lower ISQ values compared to men of the same age group.
本研究的目的是确定上颌骨中表面上成功实现骨整合的一期种植体的标准种植体稳定性商数（ISQ）值。
为测量种植体稳定性，对35例患者（18名女性，17名男性）共120颗上颌ITI种植体进行了共振频率分析（RFA）。根据种植体植入与测量之间的时间间隔，将前后种植体的ISQ值分为亚组：未加载（n = 41）、加载≤12个月（n = 31）和加载＞1年（n = 48）。使用以加载、种植体位置和性别为固定效应的混合效应模型进行统计分析。
所有测量种植体的平均ISQ为52.5±7.9（范围40至68）。统计分析显示，在3个测试时间间隔之间，ISQ值无显著差异：未加载（48.8±3.6）、加载≤12个月（54.1±7.0）和加载＞1年（53.1±9.5）。无论是在颌骨中的位置还是骨质量（使用X线片评估），均未发现显著差异。性别是唯一被发现具有显著性的参数（P＜0.003）；平均而言，男性的种植体稳定性高于女性（56.3±6.6对48.7±7.4）。
骨整合上颌ITI种植体的标准值呈现出个体范围。对单个种植体进行单次RFA测量无法评估其当前状态或预测其性能。需要在更长的时间段内进行重复测量。
在加载期或颌骨位置方面，种植体之间的ISQ值未发现显著差异。与同年龄组男性相比，绝经后女性的ISQ值显著更低。
