Kim C-K, Choi S-H, Kim T-S, Kaltschmitt J, Eickholz P
Department of Periodontology, Research Institute of Periodontal Regeneration, College of Dentistry, Brain Korea 21 Project for Medical Science, Yonsei University, Seoul, Korea.
J Periodontal Res. 2006 Dec;41(6):498-502. doi: 10.1111/j.1600-0765.2006.00895.x.
The purpose of this study was to assess the defect width of infrabony defects in a cross-sectional study and to evaluate whether the defect width is a function of defect depth.
Complete sets of intra-oral radiographs of patients with severe periodontitis, which exhibited at least one infrabony defect, were digitised and evaluated. The following parameters were measured: depth and width of the infrabony defect, defect angle, and width of the interdental spaces.
Fifty-one patients (26 women), ranging from 21 to 73 yr of age (48.5 +/- 13.4 yr), contributed a total of 1272 teeth with 135 infrabony defects (10.6%). Seventeen infrabony defects were located at sites without a neighboring tooth. Infrabony defects were statistically more prevalent in the mandible (n = 82) than in the maxilla (p = 0.013), and more prevalent at mesial sites (n = 92) than at distal sites (p < 0.001). At infrabony defects, the width of interdental spaces at the most coronal extension of the alveolar crest could be measured only at sites with neigboring teeth 2.67 +/- 0.78 mm (range: 1.19-5.70 mm). Analysis failed to reveal a statistically significant difference between defect width at sites with (2.64 +/- 0.82 mm) and sites without (2.76 +/- 0.70 mm) a neighboring tooth. Multilevel regression analysis revealed narrow defect angles to be related to deep infrabony defects, whereas width of the interdental space and distal location were related to wide defects.
Defect angle depended on defect depth and defect width was not different at sites with or without a neighboring tooth. Even in severe periodontitis, infrabony defects are found only at a minority of teeth.
本研究旨在通过横断面研究评估骨下袋缺损的宽度，并评估缺损宽度是否为缺损深度的函数。
对患有重度牙周炎且至少有一个骨下袋缺损的患者的全口口腔X光片进行数字化处理并评估。测量以下参数：骨下袋缺损的深度和宽度、缺损角度以及牙间隙宽度。
51例患者（26名女性），年龄在21至73岁之间（48.5±13.4岁），共提供了1272颗牙齿，其中有135个骨下袋缺损（10.6%）。17个骨下袋缺损位于无相邻牙的部位。骨下袋缺损在下颌（n = 82）比在上颌更常见（p = 0.013），在近中部位（n = 92）比在远中部位更常见（p < 0.001）。在骨下袋缺损处，仅在有相邻牙的部位可测量牙槽嵴最冠方延伸处的牙间隙宽度，为2.67±0.78 mm（范围：1.19 - 5.70 mm）。分析未发现有相邻牙部位（2.64±0.82 mm）和无相邻牙部位（2.76±0.70 mm）的缺损宽度存在统计学显著差异。多水平回归分析显示，狭窄的缺损角度与深骨下袋缺损相关，而牙间隙宽度和远中位置与宽缺损相关。
缺损角度取决于缺损深度，有或无相邻牙部位的缺损宽度无差异。即使在重度牙周炎中，骨下袋缺损也仅在少数牙齿中发现。
