蒙古族人上颌磨牙近中颊根第二根管的出现率及定位
发布时间：2019-06-15 06:29
【摘要】：目的:研究蒙古族人上颌磨牙近中颊根第二根管(MB2)的出现率及其相对位置关系。方法:收集蒙古族人离体上颌第一磨牙55例和第二磨牙61例并,制备偏向近中的菱形改良开髓洞口,髓室底探查法寻找MB2,测量和计算与MB2相关的髓室底参数,分析MB2根管口定位规律。结果:上颌第一、二磨牙MB2的出现率分别为67.27%和39.34%(P0.05);MB2与近中颊根主根管(MB)的根管口间的均距(mm)分别为1.66±0.61和1.43±0.48;MB2与腭根管(P)的根管口间的均距(mm)分别为3.58±0.84和3.47±0.61,MB与P的根管口间的均距(mm)分别为4.85±0.80、4.54±0.51,MB2根管口与MB-P连线的垂直距离(d,mm)的均距分别为0.79±0.45、0.68±0.41,MB-MB2连线与MB-P连线的夹角(α)的平均角度分别为(32.30±19.18)°、(33.12±22.56)°。上颌第一、二磨牙间MB2相关的髓室底参数间的差异无统计学意义(P0.05)。结论:蒙古族人上颌磨牙MB2的出现率偏高,其根管口分布有一定规律,建议在MB-P假想连线的近中20~50°之间并距该线1 mm内、距MB根管口腭侧2 mm内及距P根管口的颊侧2~4 mm内寻找MB2。
[Abstract]:Objective: to study the occurrence rate and relative position of the second root canal (MB2) of maxillary molars near the middle buccal root of Mongolian molars. Methods: 55 cases of maxillary first molar and 61 cases of second molar were collected and the rhomboid modified pulp opening was prepared. The pulp floor exploration method was used to find out the parameters of pulp floor related to MB2 measured and calculated by MB2, and the localization of MB2 root canal orifice was analyzed. Results: the occurrence rate of MB2 in maxillary first and second molars was 67.27% and 39.34% respectively (P 0.05), and the mean distance between MB2 and (MB) in the main root canal of proximal buccal root canal was 1.66 卤0.61 and 1.43 卤0.48, respectively. The mean distance between the root canal orifice of MB2 and palatine root canal (P) was 3.58 卤0.84 and 3.47 卤0.61, the mean distance between MB and P was 4.85 卤0.80, 4.54 卤0.51, the average distance between MB 2 root canal orifice and MB-P line (dmm) was 0.79 卤0.45, 0.68 卤0.41, and the average angle (伪) between MB and MB-P connection was (32. 30 卤19. 18) 掳, respectively. the average distance between MB and MB-P was 3.58 卤0.84 and 3.47 卤0.61, respectively. The mean distance between MB and P was 4.85 卤0.80, 4.54 卤0.51, respectively. The average distance between MB2 root canal orifice and MB-P line (dmm) was 0.79 卤0.45, 0.68 卤0.41, respectively. (33.12 卤22.56) 掳. There was no significant difference in MB2-related pulp floor parameters between maxillary first and second molars (P 0.05). Conclusion: the occurrence rate of MB2 in Mongolian maxillary molars is on the high side, and the distribution of root canal orifice is regular. It is suggested that MB2. should be found within 20 掳50 掳near the hypothetical line of MB-P and 1 mm from the line, 2 mm from the palatine side of MB root canal orifice and 2 鈮，
本文编号：2500036
[Abstract]:Objective: to study the occurrence rate and relative position of the second root canal (MB2) of maxillary molars near the middle buccal root of Mongolian molars. Methods: 55 cases of maxillary first molar and 61 cases of second molar were collected and the rhomboid modified pulp opening was prepared. The pulp floor exploration method was used to find out the parameters of pulp floor related to MB2 measured and calculated by MB2, and the localization of MB2 root canal orifice was analyzed. Results: the occurrence rate of MB2 in maxillary first and second molars was 67.27% and 39.34% respectively (P 0.05), and the mean distance between MB2 and (MB) in the main root canal of proximal buccal root canal was 1.66 卤0.61 and 1.43 卤0.48, respectively. The mean distance between the root canal orifice of MB2 and palatine root canal (P) was 3.58 卤0.84 and 3.47 卤0.61, the mean distance between MB and P was 4.85 卤0.80, 4.54 卤0.51, the average distance between MB 2 root canal orifice and MB-P line (dmm) was 0.79 卤0.45, 0.68 卤0.41, and the average angle (伪) between MB and MB-P connection was (32. 30 卤19. 18) 掳, respectively. the average distance between MB and MB-P was 3.58 卤0.84 and 3.47 卤0.61, respectively. The mean distance between MB and P was 4.85 卤0.80, 4.54 卤0.51, respectively. The average distance between MB2 root canal orifice and MB-P line (dmm) was 0.79 卤0.45, 0.68 卤0.41, respectively. (33.12 卤22.56) 掳. There was no significant difference in MB2-related pulp floor parameters between maxillary first and second molars (P 0.05). Conclusion: the occurrence rate of MB2 in Mongolian maxillary molars is on the high side, and the distribution of root canal orifice is regular. It is suggested that MB2. should be found within 20 掳50 掳near the hypothetical line of MB-P and 1 mm from the line, 2 mm from the palatine side of MB root canal orifice and 2 鈮，
本文编号：2500036
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