期刊
JOURNAL OF ENDODONTICS
卷 35, 期 5, 页码 643-645出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.joen.2009.01.020
关键词
Distolingual root; mandibular first molar; root curvature; root morphology
资金
- Taipei Veterans General Hospital, Taipei, Taiwan [VGH 94-042]
Introduction: The prevalence of extra distolingual (DL) roots in mandibular first molars in Chinese population is about 20%. The purpose of this study was to evaluate the difference of root length and root curvatures between distobuccal (DB) and DL roots of three-rooted mandibular first molars in a Taiwanese (Chinese) population. Methods: Of the 293 extracted mandibular first molars, DL roots were present in 29 (9.9%) teeth. Excluding teeth with fractured DB or DL roots, 21 mandibular first molars were further investigated. DB and DL root lengths were measured from the lower level of furcation at the distal surface to the root apex. The curvature of the DL root was measured on mesial-distal and buccal-lingual radiographs by Schneider's technique. Results: The DL roots were significantly (p < 0.001) shorter than the DB roots with an average of 1.48 +/- 0.81 mm. Most DL roots had a greater curvature in a buccal-lingual orientation (36.35 degrees +/- 9.38 degrees) than a mesial-distal orientation (9.24 degrees +/- 6.10 degrees) and 28.57% of the curved DL roots had the curvature at the apical one third (p < 0.001). Conclusion: The results of this study verified the characteristics of shorter root length and severe buccal-lingual inclination of DL roots in three-rooted mandibular first molars. (J Endod 2009;35:643-645)
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据