Artun J, Osterberg S K, Kokich V G
J Periodontol. 1986 Jun;57(6):341-6. doi: 10.1902/jop.1986.57.6.341.
The present experiment was undertaken to determine if an interproximal area with a thin interdental bone septum following orthodontic treatment provides less resistance against marginal periodontal breakdown than an interproximal area with a normal width of bone between the roots. Only adult patients, at least 16 years after active orthodontic treatment, were studied. The distance between the roots was measured directly on periapical radiographs. Gingival health, level of attachment and bone level in sites with thin interdental bone were compared with neighboring or contralateral sites with a normal width of bone between the roots. No statistically significant differences in inflammation, level of attachment and clinical scores for bone level were observed. When measured radiographically the distance from the cementoenamel junction to the alveolar bone was significantly shorter in neighboring control sites (P less than 0.05). This discrepancy was most likely due to radiographic distortion. The results of this investigation suggest that in anterior areas marginal periodontal breakdown is unrelated to the thickness of bone between the roots. Too few molar sites were included to draw conclusions regarding such areas.
本实验旨在确定正畸治疗后具有薄牙间骨间隔的邻间隙区域与牙根间具有正常骨宽度的邻间隙区域相比，对边缘性牙周破坏的抵抗力是否更低。仅研究了在积极正畸治疗后至少16年的成年患者。在根尖片上直接测量牙根间距离。将牙间骨薄的部位的牙龈健康状况、附着水平和骨水平与牙根间骨宽度正常的相邻或对侧部位进行比较。在炎症、附着水平和骨水平临床评分方面未观察到统计学上的显著差异。当通过影像学测量时，相邻对照部位从牙骨质釉质界到牙槽骨的距离明显更短（P小于0.05）。这种差异很可能是由于影像学失真。本研究结果表明，在前牙区，边缘性牙周破坏与牙根间骨的厚度无关。纳入的磨牙部位太少，无法就这些区域得出结论。
