Relationship between the Bone Densities around Implants Obtained by CT and Implant Stabilities in Maxillary Molar Area

doi:10.3969/j.issn.1005-4979.2018.06.006

Abstract

Abstract: Objective: To study the relationship between bone mineral density (BMD) of posterior maxilla using cone beam computed tomography(CBCT) and stabilities of implants, right after the surgery and 3 months later. Methods: 33 patients underwent implant surgeries were assessed randomly. Hounsfield units(HU) value was measured preoperatively, then the implant stability quotient(ISQ) were recorded right after 48 implants were placed and 3 months later. All data was compared using SPSS software. Results: BMD in posterior maxilla was (439.8±101.7) HU. The ISQ measured right after procedures (58.6±7.6) was significantly lower than ones measured 3 months after (66.1±7.7), P＜0.01. There was a positive and weak correlation between BMD and ISQ at the time of surgeries in posterior maxilla (r=0.33), and strongly correlation between that of 3 months (r=0.63). Conclusion: There was a positive correlation between BMD and ISQ in posterior maxilla. Further researches were needed to study the consequences.

Key words: maxillary molar area, bone density, implant stability

摘要： 目的：探讨基于锥形束CT（CBCT）的上颌磨牙种植体周围骨密度的CT测量灰度值，与牙种植术后稳定性（ISQ）之间的关系。方法：按条件筛选接受上颌磨牙区牙种植修复患者33例，术前通过预种植位置CBCT扫描，并利用CT重建软件模拟测量预种植体周围骨密度灰度值，以亨氏单位（Hounsfield units, HU）表示。随后根据软件模拟种植体方位制作种植导板，于相应预种植区植入ITI种植体48枚，并分别于术后即刻、术后3个月使用共振频率分析（resonance frequency analysis，RFA）仪器分别测量和记录种植体的稳定系数（implant stability quotient，ISQ）。运用SPSS软件对实验数据进行统计学分析。结果：33例患者上颌磨牙种植体周围骨密度灰度值均值为（439.8±101.7） HU；术后即刻ISQ均值为（58.6±7.6） HU，术后3个月ISQ均值为（66.1±7.7） HU，二者差异有统计学意义（P<0.01）。上颌磨牙种植体周围骨密度HU值分别与术后即刻稳定系数ISQ、3个月后稳定系数ISQ均呈正相关性，其中与前者呈弱相关（r=0.33），与后者呈强相关（r=0.63）。结论：在上颌磨牙区，根据种植区域骨密度的CT测量值，对该区域牙种植体预后判断具有一定的临床指导意义。

关键词: 上颌磨牙区, 骨密度, 种植体稳定性

CLC Number:

R782.4

SHA Yan-zhi, WEI Ming-gui, WANG Guo-shi. Relationship between the Bone Densities around Implants Obtained by CT and Implant Stabilities in Maxillary Molar Area[J]. 《Journal of Oral and Maxillofacial Surgery》, doi: 10.3969/j.issn.1005-4979.2018.06.006.

沙烟直，魏明贵，王国世. 上颌磨牙区种植体周围骨密度[J]. 《口腔颌面外科杂志》, doi: 10.3969/j.issn.1005-4979.2018.06.006.

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URL: https://journal06.magtech.org.cn/Jweb_joms/EN/10.3969/j.issn.1005-4979.2018.06.006

https://journal06.magtech.org.cn/Jweb_joms/EN/Y2018/V28/I6/332

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