西安市临潼区出土2200年前人龋病研究

Dental caries status of people in about 200 BC:an invertigation of excavated skulls from LinTong,Xi′an

目的:通过调查西安市临潼区出土2 200年前人牙齿的龋病流行情况,为研究龋病的发生发展规律提供依据。方法:对61例临潼区出土颅骨的999个牙齿进行详细的龋病情况观察,计算出总患龋率、不同年龄组龋齿率、不同牙位组龋齿率、不同牙面部位组龋齿率、不同年龄组龋患程度的龋齿率及不同年龄组不同性别的龋齿率进行统计学分析。结果:①本研究中有年龄标识的颅骨共43例,患龋率79.07%,龋齿率21.20%,龋均3.95。不同年龄组间龋齿率有显著性差异(P<0.05);各年龄组内不同性别间龋齿率无显著性差异(P>0.05);不同年龄组间龋患程度无显著性差异(P>0.05);②999个牙齿中共有199个龋齿,从龋患的牙位分布看,下颌第三磨牙﹥上颌第三磨牙﹥下颌第二磨牙﹥上颌第二磨牙,上颌与下颌组间龋齿率有显著性差异(P<0.05)。从龋患的牙面部位分布看,牙齿根面(颈部)龋最多,占总患龋牙面数的37.15%;其次为邻面龋,占35.37%。结论:龋病在战国中晚期至先秦时期普通人群中已经较为常见,但患龋率较现代人低,龋病的发生率随着人类不断进化和社会文明的进步而不断提高。

AIM： To investigate the status of dental caries in people of 200 BC.METHODS： Nine hundred and ninty-nine teeth in 61 skulls of people about 200 BC excavated from Xi＇an City were examined and analyzed.Caries prevalence rate,differentiated caries prevalence rates of age,sex,tooth position and tooth surfaces were also calculated.RESULTS： ①Among the 61 skulls,43 could be identified by age.The prevalence of caries in the 43 skulls was 79.07%.The ratio of caries was 21.20%.The DMF index was 3.95.Significant difference in caries ratio was observed between age groups（P0.05） Within the same age group,no significant difference in caries ratio was found between male and female（P0.05）.There was no obvious difference in the degree of caries among age groups（P0.05）.② Caries was most frequently found in mandibular third molar,followed by maxillary third molar,mandibular second molar,and maxillary second molar.There was a significant difference in caries ratio between mandibular teeth and maxillary teeth（P0.05）.Dental cervix caries consisted 37.15% and proximal dental caries consisted 35.37% of total caries.CONCLUSION： Dental caries was popular in human about 200 BC,but the prevalence was lower than the modern people.With the human evolution and the improvement of the socia1 productivity,the prevalence of dental caries gradually increased.