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目的:统计分析下颌第二磨牙龋坏始发部位及严重程度,并分析其与性别、年龄及下颌第三磨牙萌出状况的关系。方法:采用临床与X线检查对481例下颌第二磨牙龋坏患者进行统计调查,应用SPSS 13.0软件包对结果进行x~2检验。结果:下颌第二磨牙龋坏多始发于(牙合)面和远中邻面,其次为颊面,发生率分别为33.8%、33.2%、24.4%;累及牙髓的龋坏最多,占49.7%,深龋、浅中龋分别占31.7%、18.6%;男、女性别在龋坏部位分布总体上无显著差异;年龄与下颌第二磨牙的龋坏部位分布及严重程度有显著的相关性,随着年龄增大,(牙合)面和远中邻面龋坏增多,程度加重;下颌第三磨牙萌出状况对下颌第二磨牙龋坏影响显著。结论:下颌第二磨牙始发龋坏牙面以(牙合)面及远中邻面最多,龋损程度严重,年龄、下颌第三磨牙萌出状况与龋坏状态关系密切。预防性拔除异常萌出的下颌第三磨牙及定期检查,是预防和早期治疗下颌第二磨牙龋坏的有效措施。
OBJECTIVE: To statistically analyze the origin and severity of carious lesions in the second mandibular molars, and analyze the relationship with the sex, age and eruption status of mandibular third molars. Methods: The clinical and X-ray examination of 481 cases of mandibular second molar decay patients were statistically investigated, using SPSS 13.0 package for the results of x ~ 2 test. Results: The incidence of dental caries in the mandibular second molars mainly occurred on the occlusal surface and the distal mid-adjacent surface, followed by the buccal surface, the incidence rates were 33.8%, 33.2% and 24.4% 49.7%, deep caries, shallow caries accounted for 31.7%, 18.6% respectively; there was no significant difference in the distribution of caries in men and women in general; the age was significantly related to the distribution and severity of caries in the second molar Sex, as age, dental caries increased, the extent increased; mandibular third molars eruption of mandibular second molars carious significantly affected. Conclusion: The incidence of carious dental surface in the second molar of mandibular second molar is highest, the degree of carious lesions is serious. The age, mandibular third molar eruption status and caries status are closely related. Preventive removal of abnormal eruption of the mandibular third molars and regular inspection, is to prevent and early treatment of mandibular second molar decay the effective measures.