Department of Periodontology, Outpatient Center, School and Hospital of Stomatology, Peking University, Beijing, China.
J Clin Periodontol. 2014 Mar;41(3):269-74. doi: 10.1111/jcpe.12150. Epub 2013 Dec 22.
The aim of this study was to investigate the accuracy of cone-beam computed tomography (CBCT) in assessing maxillary molar furcation involvement (FI).
Fifteen patients with generalized chronic periodontitis after initial therapy were recruited. CBCT was performed in maxillary molars with probing pocket depths of ≥6 mm and advanced FI, and CBCT images were analysed. Furcation surgery was performed in 20 maxillary molars. Lastly, intra-surgical FI assessments were compared with CBCT-based data.
Intra-surgical findings confirmed 82.4% of the CBCT data, with a weighted kappa of 0.917. The agreement between both assessments was the highest in buccal furcation entrances, followed by distopalatal and mesiopalatal furcation entrances. Of the four parameters tested of detailed root anatomy and furcation morphology, the mean length of the root trunk and the width of the furcation entrance revealed by CBCT were consistent with their respective intra-surgical values (p > 0.05). Horizontal bone loss and vertical bone loss were underestimated by CBCT relative to their respective intra-surgical classifications (p ≤ 0.05).
Cone-beam computed tomography images demonstrate a high accuracy in assessing the loss of periodontal tissue of the FI and root morphologies in maxillary molars.
本研究旨在探讨锥形束 CT（CBCT）评估上颌磨牙分叉病变（FI）的准确性。
本研究共纳入 15 名经初始治疗后患有广泛性慢性牙周炎的患者。对探诊深度≥6mm 且存在晚期 FI 的上颌磨牙进行 CBCT 检查，并对 CBCT 图像进行分析。对 20 颗上颌磨牙进行分叉手术。最后，将术中 FI 评估与基于 CBCT 的数据进行比较。
术中发现证实了 82.4%的 CBCT 数据，加权 Kappa 值为 0.917。两种评估方法在颊侧分叉入口处的一致性最高，其次是远中腭侧和近中腭侧分叉入口处。在四个测试的详细根解剖和分叉形态参数中，CBCT 显示的根干长度和分叉入口宽度与其各自的术中值一致（p＞0.05）。CBCT 相对于其各自的术中分类低估了水平骨丧失和垂直骨丧失（p≤0.05）。
CBCT 图像在评估上颌磨牙 FI 牙周组织丧失和根形态方面具有较高的准确性。
