Department of Periodontology, Faculty of Dentistry, Istanbul Okan University, Istanbul, Turkey.
Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Istanbul Medeniyet University, Istanbul, Turkey.
Oral Radiol. 2023 Oct;39(4):802-810. doi: 10.1007/s11282-023-00706-6. Epub 2023 Aug 18.
This study assessed the root proximity in molars and the furcation area (FA) in the first root separation point (RSP) using cone‑beam computed tomography (CBCT) and evaluated the association between the furcation area of molars and periodontal status of the patients.
A total of 264 molar teeth in 66 participants were included in the study. The control group consisted of 110 molar teeth of participants, and 154 molar teeth were included in periodontitis group, which consisted of only stage II and III periodontitis patients. FA, RSP, and root proximities were measured in axial slices, and bone resorption rates were measured in sagittal slices.
Both maxillary and mandibular molar groups had significantly less FA in periodontitis group than in controls (p < 0.005), and there were significant relationships between the degree of bone resorption in molars and FA and furcation grades (p < 0.001). According to regression analysis, the risk of periodontitis increased by 1.011 times as total FA decreased (p < 0.001), and periodontitis risk of maxillary molar was 1.693 times higher than mandibular molars but not found to be statistically significant (p = 0.152). When assessing the root proximity between molar teeth, maxillary molars showed significantly higher root proximity in CEJs than mandibular molars in both periodontitis and control groups (p < 0.05).
The results indicate that the association between FA and the degree of bone resorption and root proximity of maxillary molars might be considered as a risk indicator for bone resorption in molars and might play a role during disease progression.
本研究通过锥形束计算机断层扫描（CBCT）评估磨牙的根近中情况和第一根分叉分离点（RSP）的分叉区（FA），并评估磨牙 FA 与患者牙周状况之间的关系。
共纳入 66 名患者的 264 颗磨牙。对照组包括 110 颗磨牙，牙周炎组包括 154 颗磨牙，仅包括 II 期和 III 期牙周炎患者。在轴位切片上测量 FA、RSP 和根近中情况，并在矢状位切片上测量骨吸收率。
上颌和下颌磨牙组在牙周炎组的 FA 明显小于对照组（p<0.005），磨牙骨吸收程度与 FA 和分叉程度之间存在显著关系（p<0.001）。根据回归分析，FA 总减少时，牙周炎的风险增加 1.011 倍（p<0.001），上颌磨牙的牙周炎风险是下颌磨牙的 1.693 倍，但无统计学意义（p=0.152）。在评估磨牙之间的根近中情况时，上颌磨牙在 CEJ 处的根近中情况明显高于下颌磨牙，无论在牙周炎组还是对照组均如此（p<0.05）。
结果表明，FA 与骨吸收程度和上颌磨牙根近中的关系可能被视为磨牙骨吸收的风险指标，并可能在疾病进展过程中发挥作用。
