华西口腔医学杂志

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广东青少年上颌第一前磨牙根管弯曲情况的研究

曾素娟1 胡雁2 王小燕1 蔡小灵1 王莉萍1   

  1. 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
  • 收稿日期:2012-06-25 修回日期:2012-06-25 出版日期:2012-06-01 发布日期:2012-06-01
  • 通讯作者: 胡雁,Tel:020-83863002
  • 作者简介:曾素娟(1970—),女,湖南人,副主任医师,硕士

In vitro study on the curvatures of root canal of maxillary first premolars among adolescents in Guangdong
province

Zeng Sujuan1, Hu Yan2, Wang Xiaoyan1, Cai Xiaoling1, Wang Liping1   

  1. 1. Dept. of Oral Medicine, Hospital of Stomatology, Guangzhou Medical University, Guangzhou 510140, China; 2. Dept. of Special Dental Clinic, Hospital
    of Stomatology, Sun Yat-Sen University, Guangzhou 510055, China
  • Received:2012-06-25 Revised:2012-06-25 Online:2012-06-01 Published:2012-06-01
  • Contact: Hu Yan,Tel:020-83863002
  • About author:Zeng Sujuan(1970—),女,湖南人,副主任医师,硕士

摘要:

目的探讨广东青少年上颌第一前磨牙的根管弯曲情况,并对比分析男女间的差异。方法选择广东青少年上颌第一前磨牙200颗,其中男女各100颗。开髓并充分暴露根管口后,将一支K型锉插入根管内直至根尖孔处。利用牙科数字成像系统拍摄每颗牙的近远中向及颊舌向影像,采用Schneider法测量根管弯曲角度(CCA),然后选择弯曲角度大于5°的根管,采用Günday法测量根管进入角度(CAA)、弯曲高度(X)和弯曲距离(Y),分析男女两组之间的差异及CAA与CCA、X和Y的相互关系。结果59.21%的根管存在颊舌向弯曲,男女分别为49.74%、68.98%;41.05%的根管存在近远中向弯曲,男女分别为36.27%、45.99%;6.84%的根管为S形弯曲,男女分别为4.15%、9.63%。单根管在颊舌向、腭根管在颊舌向和近远中向的弯曲率均为女性高于男性(P<0.05)。颊根管在颊舌向和近远中向Y值和腭根管颊舌向CCA均为女性大于男性(P<0.05);男女弯曲颊、腭根管的CAA与CCA及X呈显著正相关(P<0.01),与Y呈显著负相关(P<0.05)。结论上颌第一前磨牙根管存在颊舌向和近远中向弯曲,其中一些为S形根管。女性根管弯曲率高于男性。

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

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. The 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 Günday. Linear correlations of the measurements were analyzed. Results 59.21% of the total roots were curved in buccal-lingual directions. The 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 root canals 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.

Key words: gender, canal curvature angle, canal access angle, curvature height, curvature distance