Ivanova Vasilena, Chenchev Ivan, Zlatev Stefan, Atanasov Dimitar
Medical University of Plovdiv, Plovdiv, Bulgaria.
Folia Med (Plovdiv). 2020 Sep 30;62(3):563-571. doi: 10.3897/folmed.62.e49424.
Sufficient bone volume, as well as the bone quality characteristics are necessary prerequisites to ensure optimal mechanical stability of the implants and subsequent osseointegration.
The aim of the present study was to assess the correlation between bone density values obtained by cone-beam computed tomography (CBCT), the primary stability of dental implants and the histomorphometric analysis of bone quality.
Following tooth extraction, socket preservation with frieze-dried bone allograft or protein-rich fibrin (PRF) was performed on 30 patients with 30 maxillary teeth in the region from second premolar to second premolar. Four months after the procedure, CBCT was used to assess the bone density (Hounsfield units) in the area of extraction. Thirty bone samples were harvested from implant sites using a trephine drill. They were analyzed with Image J software. Immediately after placing the implant, the implant stability quotient was measured using the Osstell Idx device.
The results revealed significant correlations between bone density and primary stability along the vestibulo-oral (r=0.392, p=0.032) and mesiodistal axes (r=0.407, p=0.026). Bone density also correlated strongly with the percentage of newly formed bone (r=0.776, p<0.001).
Bone quality, in terms of bone density measured in CBCT and new bone formation are correlated to the primary stability of the dental implants and vice versa.
充足的骨量以及骨质量特征是确保种植体获得最佳机械稳定性及后续骨结合的必要前提条件。
本研究旨在评估锥形束计算机断层扫描（CBCT）获得的骨密度值、牙种植体的初期稳定性以及骨质量的组织形态计量学分析之间的相关性。
对30例上颌第二前磨牙至第二前磨牙区域有30颗牙齿的患者拔牙后，采用冻干同种异体骨或富含蛋白质的纤维蛋白（PRF）进行牙槽窝保存。术后4个月，使用CBCT评估拔牙区域的骨密度（亨氏单位）。使用环钻从种植部位采集30个骨样本。用Image J软件进行分析。植入种植体后，立即使用Osstell Idx设备测量种植体稳定性商数。
结果显示，沿前庭-口腔轴（r = 0.392，p = 0.032）和近远中轴（r = 0.407，p = 0.026），骨密度与初期稳定性之间存在显著相关性。骨密度与新形成骨的百分比也密切相关（r = 0.776，p < 0.001）。
就CBCT测量的骨密度和新骨形成而言，骨质量与牙种植体的初期稳定性相关，反之亦然。
