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目的探讨安氏Ⅱ1错牙合畸形患者牙槽骨垂直吸收发生情况及好发牙位。方法筛选2005年1月至2010年1月云南省第二人民医院安氏Ⅱ1错牙合畸形行正畸治疗病例1351例,按年龄将其分为15~19岁组和35~44岁组。对患者治疗前的石膏模型、全颌曲面断层片进行统计分析。结果 (1)牙槽骨垂直吸收患病率:两组患者均高于正常牙合人群(P<0.05);35~44岁组高于15~19岁组(P<0.05);同年龄组间性别差异无统计学意(P<0.05)。(2)牙槽骨垂直吸收好发牙位:安氏Ⅱ1错牙合畸形组,15~19岁组是76 67,35~44岁组是76 67;正常牙合组:两年龄组均为321 123和321 123。结论安氏Ⅱ1错牙合畸形患者较正常牙合人群更易发生牙槽骨的垂直吸收,且牙槽骨垂直吸收发生率随年龄增加而增加,提示正畸临床治疗中,安氏Ⅱ1错牙合畸形患者,尤其是成年患者,更应关注其牙周健康及定期进行牙周维护性治疗。
Objective To investigate the occurrence of vertical absorption of alveolar bone in patients with Angle Ⅱ 1 malocclusion and its incidence of premature eruptions. Methods A total of 1351 cases of Angle Ⅱ 1 malocclusion orthodontic treatment from January 2005 to January 2010 in Yunnan Second People’s Hospital were enrolled and divided into 15 to 19 years old group and 35 to 44 years old group according to their age. Patients before treatment of plaster model, total jaw curved surface of the slice for statistical analysis. Results (1) Prevalence of vertical absorption of alveolar bone in both groups were significantly higher than that in normal occlusion group (P <0.05), higher in 35-44 years group than in 15--19 years group (P <0.05), same age group There was no significant difference between the sexes (P <0.05). (2) Alveolar bone vertical absorption of good teeth: Angle Ⅱ malocclusion group, 15 to 19 years old group is 76 67, 35 to 44 years old group is 76 67; normal occlusion group: both age groups were 321 123 and 321 123. Conclusions The malocclusion of Angle Ⅱ1 malocclusion is more prone to vertical alveolar bone absorption than normal occlusion, and the incidence of vertical alveolar bone absorption increases with age, suggesting that in the clinical treatment of orthodontics, Malformation patients, especially adult patients, should pay more attention to their periodontal health and regular periodontal maintenance treatment.