Department of Mechanical Engineering, University of Alberta.
Rehabilitation Research and Technology Development, Glenrose Rehabilitation Hospital.
Otol Neurotol. 2018 Jul;39(6):e489-e495. doi: 10.1097/MAO.0000000000001815.
This study aims to provide a clinical evaluation of the Advanced System for Implant Stability Testing (ASIST) for assessment of implant stability for bone-anchored hearing aid patients. We evaluate the longitudinal changes in implant interface stability during the first year following surgery.
ASIST measurements were collected for 39 patients selected to receive a bone anchored hearing aid for hearing loss. Measurements were collected at the time of surgery and at 3 days, 2 weeks, 1 month, 3 months, 6 months, and 12 months following surgery. Longitudinal changes in ASIST Stability Coefficient (ASC) were determined for each patient. Correlations were investigated between initial implant stability as measured by the ASC and clinical parameters such as operating surgeon, patient age at surgery, and implant type.
ASC values ranged from 11.9 to 137.0 (31.9 ± 18.0). On average, there was a slight decrease in ASC up to 3 months after surgery followed by an increase up to 1 year. Preliminary results presented in this study suggest that there may be differences in the initial stability between operating surgeons (p = 0.0012; p = 0.0049) and there was a trend toward possible differences between different implant types.
We have shown promising results using the ASIST in a clinical setting for longitudinal evaluation of bone-implant interface integrity. Isolating the interface properties from the implant-abutment system allows for objective comparisons across patients that are not possible with other stability measurement systems.
本研究旨在对 Advanced System for Implant Stability Testing（ASIST）进行临床评估，以评估骨锚定听力植入患者的种植体稳定性。我们评估了术后第一年种植体界面稳定性的纵向变化。
选择 39 名接受骨锚定听力植入治疗听力损失的患者进行 ASIST 测量。测量在手术时、术后 3 天、2 周、1 个月、3 个月、6 个月和 12 个月时进行。确定每位患者的 ASIST 稳定性系数（ASC）的纵向变化。调查了初始种植体稳定性（由 ASC 测量）与临床参数（如手术医生、手术时患者年龄和植入物类型）之间的相关性。
ASC 值范围为 11.9 至 137.0（31.9±18.0）。平均而言，术后 3 个月内 ASC 值略有下降，随后 1 年内上升。本研究初步结果表明，手术医生之间的初始稳定性可能存在差异（p=0.0012；p=0.0049），不同植入物类型之间可能存在差异的趋势。
我们已经在临床环境中使用 ASIST 展示了有前途的结果，用于骨-种植体界面完整性的纵向评估。将界面特性与种植体-基台系统分离，可以对患者进行客观比较，而其他稳定性测量系统则无法实现。
