Cross-sectional morphology and minimum canal wall widths in C-shaped roots of mandibular molars

被引:59
作者
Chai, WL [1 ]
Thong, YL
机构
[1] Univ Malaya, Fac Dent, Gen Dent Practice Unit, Kuala Lumpur 50603, Malaysia
[2] Univ Malaya, Fac Dent, Dept Conservat Dent, Kuala Lumpur 50603, Malaysia
关键词
D O I
10.1097/00004770-200407000-00012
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
The cross-sectional canal morphology and minimum widths of buccal and lingual canal walls were studied in 20 mandibular molars with C-shaped roots and canal orifices. The roots were mounted in clear resin blocks and sectioned transversely at 1-mm intervals. A total of 154 cross-sections were evaluated with an image analyzer. Twelve different longitudinal canal configurations were identified. The most prevalent were types 1-2 and 1-2-1 with each type occurring in four roots. Evaluation of the cross-sectional morphology showed that the configurations were complete "C" (27%), incomplete C (64%), and non-C (9%). The mean value for the minimum width of the lingual canal wall was 0.58 +/- 0.21 mm and the buccal wall was 0.96 +/- 0.26 mm. This suggests that there is a higher risk of root perforation at the thinner lingual walls of C-shaped canals during shaping and post canal preparation procedures. Both buccal and lingual canal walls were frequently narrower at mesial locations.
引用
收藏
页码:509 / 512
页数:4
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