Department of Oral and Maxillofacial Surgery, College of Dentistry, University of Baghdad, Baghdad, Iraq.
J Craniofac Surg. 2022 Sep 1;33(6):e553-e557. doi: 10.1097/SCS.0000000000008429. Epub 2021 Dec 20.
The aim of this study was to evaluate the effect of bone density value in Hounsfield unit derived from cone beam computed tomography (CBCT), and implant dimensions in relation to implant stability parameters namely the resonance frequency analysis and the insertion torque (IT) value. It included 24 patients who received 42 dental implants (DI). The bone density of the planned implant site was preoperatively measured using cone beam computed tomography. The implant stability was measured using Osstell implant stability quotient (ISQ). The ISQ values were recorded immediately postoperatively and after 16 weeks. The IT value was categorized as 35 N/cm or > 35 N/cm. The mean (standard deviation) primary stability was 79.58 (5.27) ISQ, which was significantly higher than the secondary stability 74.31 (6.34) ISQ ( P < 0.0001). There was a significant moderate positive correlation of bone density with primary stability ( r = 0.4, P = 0.0099) and no correlation with secondary stability ( r = 0.003, P = 0.9867). The bone density of DI with 35 N/cm IT was significantly lower than with > 35 N/cm IT ( P = 0.0390). Better stability was recorded with wider implants. Whereas the length of the DI showed a nonsignificant correlation with primary and secondary stability ( P = 0.7633 and 0.4670, respectively). The DI dimensions showed a nonsignificant correlation with the IT. Cone beam computed tomography may be considered as a reliable method to assess bone density and predict the implant stability. The diameter of DI affected the implant stability favorably, whereas DI length showed no effect.
本研究旨在评估从锥形束 CT（CBCT）获得的骨密度值（以亨氏单位表示）以及种植体尺寸与种植体稳定性参数（即共振频率分析和植入扭矩[IT]值）的关系。共纳入 24 名患者，共植入 42 颗牙种植体（DI）。术前使用锥形束 CT 测量计划种植体部位的骨密度。使用 Osstell 种植体稳定性指数（ISQ）测量种植体稳定性。ISQ 值在术后即刻和 16 周后记录。IT 值分为 35 N/cm 或 > 35 N/cm。初级稳定性的平均（标准差）为 79.58（5.27）ISQ，明显高于次级稳定性 74.31（6.34）ISQ（P < 0.0001）。骨密度与初级稳定性呈显著中度正相关（r = 0.4，P = 0.0099），与次级稳定性无相关性（r = 0.003，P = 0.9867）。IT 值为 35 N/cm 的 DI 的骨密度明显低于 > 35 N/cm 的 DI（P = 0.0390）。较宽的种植体具有更好的稳定性。而 DI 的长度与初级和次级稳定性呈无显著相关性（P = 0.7633 和 0.4670）。DI 尺寸与 IT 无显著相关性。锥形束 CT 可作为一种可靠的方法来评估骨密度并预测种植体稳定性。DI 的直径对种植体稳定性有有利影响，而 DI 的长度无影响。
