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目的:探讨恒牙先天缺失在口腔正畸患者中的发生率、发生程度及牙齿缺失分布情况。方法:选取我院2012年4月-2014年9月收治的口腔正畸患者648例,对其全颌曲面断层片情况进行观察,并详细统计患性别、缺失牙数及分布情况。结果:648例口腔正畸患者中,恒压先天缺失例数为59例,发生率为9.10%,其中男性例数为19例,女性例数为40例,发生率分别为9.05%、9.13%,对比无显著差异(P>0.05);59例恒牙先天缺损患者缺牙总数为96颗,缺失牙数为2颗及以下患者总例数为51例(86.44%),缺失牙数>2颗的患者例数为8例(13.56%),对比差异显著(P<0.05);上颌、下颌缺牙数分别占缺牙总数的31.25%、68.75%,对比具有显著差异(P<0.05),左侧、右侧缺牙数分别占缺牙总数的48.96、51.04%%,对比无明显差异(P>0.05)。结论:口腔正畸患者恒压先天缺失在男女中的发生率无明显差异,大多数患者缺失牙数为1-2颗,且多数缺失发生于下颌,下颌侧切牙及下颌第二前磨牙为主要缺失牙位。
Objective: To investigate the incidence, occurrence and distribution of tooth loss in permanent orthodontic patients with congenital absence of permanent teeth. Methods: A total of 648 orthodontic patients admitted to our hospital from April 2012 to September 2014 were selected to observe the situation of the total jaw flexion. The gender, number of missing teeth and their distribution were analyzed in detail. Results: Among 648 orthodontic patients, the number of congenital absence of constant pressure was 59 (9.10%), including 19 males and 40 females, the incidence rates were 9.05% and 9.13% (P> 0.05). There were 96 cases of missing teeth in 59 cases with congenital defects, 51 cases (86.44%) with missing teeth of 2 cases or less, and the number of missing teeth> 2 There were significant differences (P <0.05) in the number of missing teeth in the upper jaw and lower jaw, which accounted for 31.25% and 68.75% of the total number of missing teeth, respectively, in 8 cases (13.56% The numbers of missing teeth on the left and right sides accounted for 48.96 and 51.04%% of the total number of missing teeth, respectively, with no significant difference (P> 0.05). Conclusion: The incidence of congenital absence of constant pressure in orthodontics patients was no significant difference between men and women, the majority of patients with missing teeth 1-2, and most of the missing occurred in the mandible, mandibular lateral incisor and mandibular second premolar as the main Missing teeth.