中国南宁人和老挝万象人上颌第一恒磨牙解剖形态的比较

发布时间：2018-03-07 21:37

本文选题：南宁人　切入点：万象人　出处：《广西医科大学》2014年硕士论文　论文类型：学位论文

【摘要】：目的:比较中国南宁和老挝万象人上颌第一恒磨牙的解剖形态，为牙髓病治疗提供临床参考依据。方法：搜集来自中国南宁和老挝万象地区人上颌第一恒磨牙各22颗。通过电子数显卡尺测量牙体外形，手术显微镜观察髓室底沟形态、透明牙技术了解近中颊根根尖孔数目、位置类型以及根管形态。采用SPSS19.0软件对以上各组数据进行统计学分析。结果：中国南宁和老挝万象人上颌第一恒磨牙的平均牙长分别为18.73mm、18.40mm，牙冠长度分别为7.21mm、6.40mm,根长分别为11.52mm、12.00mm，。南宁人牙冠比万象人长，，差异有统计学意义(P0.05),根长和牙长均无统计学差异（P0.05）。两组人群上颌第一恒磨牙的髓室底沟形态均以均以“7”型和“Y”为主，差异不存在统计学意义(P0.05)。近中颊根根尖2个以上根尖孔的发生率为南宁人77%，万象人59%(P0.05)，近中颊根根尖孔位于根尖区的比例分别为44%和43%（P0.05)。南宁人的近中颊根的根管形态以I型、IV型和V型为主，分别占32%，22.7%和18%，万象人则以I型、II型、IV型为主，分别占27%、32%、27%，两组居民的近颊根根管形态存在统计学差异（P0.05）。结论：1、南宁和万象人的上颌第一恒磨牙髓室底沟以“Y”型和“7”型为主。2、南宁人的上颌第一恒磨牙近颊根尖孔数目更多。3、两地区人上颌第一恒磨牙近颊根尖孔主要位于非根尖区。4、两地区人上颌第一恒磨牙近颊根双根管存在率高。
[Abstract]:Objective: to compare the anatomical morphology of maxillary first molar in Nanning and Vientiane, China, and to provide clinical reference for the treatment of pulp disease. Methods: a total of 22 maxillary first permanent molars were collected from Nanning and Vientiane regions of China. The shape of teeth was measured by electronic digital caliper, the morphology of pulp floor sulcus was observed by operation microscope, and the number of apical foramen of proximal buccal root was determined by transparent tooth technique. The location type and root canal morphology were analyzed statistically by SPSS19.0 software. Results: the average tooth length, crown length and root length of maxillary first permanent molar in Nanning and Laotian were 18.73 mm and 18.40 mm, 7.21 mm and 6.40 mm, respectively, and the root length were 11.52 mm and 12.00 mm, respectively. The tooth crown of Nanning was longer than that of Vientiane. There was no significant difference in root length and tooth length between the two groups. The incidence of more than 2 apical foramen in the proximal buccal root tip was 77 in Nanning people, P0.05 in Vientiane, 44% in the apical area of the proximal buccal root root, and 43 in the apical region of the proximal buccal root. The root canal shape of the proximal buccal root of Nanning people was similar to that of the proximal buccal root in Nanning. I type IV and V type are dominant. The proportion of 32% and 18% was 22. 7% and 18%, respectively. In Vientiane, type I, type II and type IV were dominant, accounting for 2732 and 27, respectively. There was a statistical difference between the two groups in the morphology of the proximal buccal root canal (P0.05). ConclusionThe root sulcus of maxillary first permanent grinding pulp in Nanning and Vientiane is mainly "Y" and "7". The number of proximal foramen of maxillary first molar is more. 3 in Nanning and Vientiane. The main foramen of maxillary first permanent molar is mesiobuccal apical foramen in both regions. In the non-apical region of. 4, the presence of double canals in the buccal root of the first maxillary permanent molar was high in both regions.
【学位授予单位】：广西医科大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R781

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