Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea.
Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea; Gangam Severance Hospital, Seoul, Korea.
Am J Orthod Dentofacial Orthop. 2019 May;155(5):650-655.e2. doi: 10.1016/j.ajodo.2018.05.027.
The goal of this study was to compare the outcomes and amount of change in periodontal health of anterior teeth in young versus middle-aged adults, who were treated to improve anterior alignment and occlusion.
Pre- and posttreatment records including orthodontic casts, cephalograms, and standardized periapical radiographs were retrospectively collected from young adults (aged 19-30 years; n = 12) and middle-aged adults (aged ≥40 years; n = 27). Following the American Board of Orthodontics criteria, discrepancy index (DI), cast-radiograph evaluation (CRE), treatment duration (TD), marginal bone loss (MBL), and tooth length (TL) were measured, and with the use of periapical radiographs, changes in the level of marginal bone (MBC) and the amount of root resorption (RR) after orthodontic treatment were calculated.
DI, MBL, and TD were significantly higher in the middle-aged adults than in the young adults (P < 0.05). However, CRE and MBC after treatment were similar between the 2 groups (P > 0.05). The mean amount of RR following treatment was -0.6 ± 0.44 mm and -1.0 ± 0.61 mm in young and middle-aged adults, respectively. The degree of RR after compensating for treatment complexity and TD was similar between the 2 groups (P > 0.05).
Although the initial malocclusion and periodontal conditions were unfavorable for the middle-aged adults, the overall treatment and periodontal outcomes after orthodontic treatment of the anterior teeth were similar to those for young adults. It appears that older adults tolerate orthodontics to improve the appearance of the anterior teeth as well as younger adults, with no additional burden because of their increased age.
本研究旨在比较年轻和中年成人接受改善前牙排列和咬合的正畸治疗后，前牙牙周健康的结果和变化程度。
从年轻成人（19-30 岁；n=12）和中年成人（≥40 岁；n=27）中回顾性收集正畸治疗前后的记录，包括正畸模型、头颅侧位片和标准根尖片。根据美国正畸委员会标准，测量差异指数（DI）、模型-射线评估（CRE）、治疗时间（TD）、边缘骨丧失（MBL）和牙长（TL），并用根尖片计算正畸治疗后边缘骨水平（MBC）和根吸收量（RR）的变化。
中年成人的 DI、MBL 和 TD 明显高于年轻成人（P<0.05）。然而，两组治疗后的 CRE 和 MBC 相似（P>0.05）。治疗后 RR 的平均量分别为年轻成人和中年成人的-0.6±0.44mm 和-1.0±0.61mm。两组间治疗复杂性和 TD 补偿后的 RR 程度相似（P>0.05）。
尽管中年成人的初始错颌畸形和牙周状况不利，但前牙正畸治疗后的整体治疗和牙周结果与年轻成人相似。似乎老年成人与年轻成人一样能够耐受正畸治疗，以改善前牙的美观，而不会因年龄增长而增加额外的负担。
