华西口腔医学杂志2012，Vol.30Issue(3)：287-291,5.DOI:10.3969/j.issn.1000-1182.2012.03.016
广东青少年上颌第一前磨牙根管弯曲情况的研究
In vitro study on the curvatures of root canal of maxillary first premolars among adolescents in Guangdong province
曾素娟 1胡雁 2王小燕 1蔡小灵 1王莉萍1
作者信息
- 1. 广州医学院口腔医院 口腔内科,广州510140
- 2. 中山大学附属口腔医院 特诊室,广州510055
- 折叠
摘要
Abstract
Objective To study the root canal curvatures of adolescents' maxillary first premolars in Guangdong province and the differences between male and female were studied. Methods 200 maxillary first premolars among adolescents in Guangdong Province (100 males and 100 females) were numbered in proper. After access preparation, a K-file was inserted into the canal until the tip of the file was just seen at the apical foramen. Then standardized periapical images were taken from mesial-distal and buccal-lingual directions with radio visio graphy. Trie angle of canal curvature (CCA) was determined according to the method described by Schneider. Then the curved canals whose angle were more than 5° were chosen, and the canal access angle (CAA), curvature height (X) and curvature distance (Y) were determined according to the method described by Gunday. Linear correlations of the measurements were analyzed. Results 59.21% of the total roots were curved in buccal-lingual directions. Hie incidence rates of males' and females' were 49.74% and 68.98%, respectively. 41.05% of the total roots were curved in mesial-distal directions. The incidence rates of males' and females' were 36.27% and 45.99%, respectively. 6.84% of the total roots were S-shaped curves. 4.15% and 9.63% of canals from male and female were S-shaped curves, respectively. The curvatures of single root canals between male and female had statistical differences in buccal-lingual directions (P<0.05). The curvatures of the lingual root canals from females in buccal-lingual directions and mesial-distal directions was higher than males' (P<0.05). The Y of buccal root canals in buccal-lingual directions and mesial-distal directions and the CCA of lingual root canals in buccal-lingual directions between male and female had statistical differences (P<0.05). The CAA of curved buccal canals and curved palatal canals from female and female had positive correlation with CCA and X(P<0.01), while negative correlation with Y(P<0.05). Conclusion There are curved rootcanals in buccal-lingual and mesial-distal directions in the maxillary first premolars, and some curved root canals were S-shaped. The curved canals incidence rate of females was higher than males.关键词
性别/根管弯曲角度/根管进入角度/弯曲高度/弯曲距离Key words
gender/ canal curvature angle/ canal access angle/ curvature height/ curvature distance分类
医药卫生引用本文复制引用
曾素娟,胡雁,王小燕,蔡小灵,王莉萍..广东青少年上颌第一前磨牙根管弯曲情况的研究[J].华西口腔医学杂志,2012,30(3):287-291,5.
