Artun J, Osterberg S K
J Clin Periodontol. 1987 May;14(5):261-6. doi: 10.1111/j.1600-051x.1987.tb01530.x.
The present study was undertaken to examine whether secondary crowded mandibular incisors experience more periodontal breakdown than aligned lower incisors long-term after orthodontic treatment. Patients from 19 to 35 years after active treatment were selected. 2 groups were established: 1 with crowded mandibular incisors and 1 with aligned incisors. The groups were matched according to age, time after treatment, gender and periodontal disease classification. A separate group with crowded and aligned incisors within the same individual was established. Accumulation of plaque, gingival inflammation, probing pocket depth and probing attachment level were registered at 6 locations around each incisor. Among the patients studied, the oral hygiene level was high. In both groups, the loss of connective tissue attachment was largely due to periodontal pocket formation in interproximal areas and gingival retraction in buccal and lingual areas. A small but statistically significant difference in probing attachment level was found between crowded and aligned interproximal areas within the same individual (P less than 0.05). No differences in accumulation of plaque or in gingival inflammation were found. No differences were found for any of the dependent variables between the groups with crowded and aligned incisors.
本研究旨在探讨正畸治疗长期后，继发性拥挤的下颌切牙是否比排列整齐的下切牙经历更多的牙周破坏。选择了接受积极治疗后19至35岁的患者。设立了2组：1组为下颌切牙拥挤组，1组为切牙排列整齐组。根据年龄、治疗后时间、性别和牙周疾病分类对两组进行匹配。在同一个体内设立了一组切牙拥挤和排列整齐的单独组。记录每颗切牙周围6个位置的菌斑堆积、牙龈炎症、探诊袋深度和探诊附着水平。在研究的患者中，口腔卫生水平较高。在两组中，结缔组织附着丧失主要归因于邻间隙区域的牙周袋形成以及颊侧和舌侧区域的牙龈退缩。在同一个体内，拥挤和排列整齐的邻间隙区域之间在探诊附着水平上发现了微小但具有统计学意义的差异（P小于0.05）。未发现菌斑堆积或牙龈炎症方面的差异。切牙拥挤组和排列整齐组之间在任何因变量上均未发现差异。
