手用ProTaper成形下颌第二磨牙根管的实验研究  

The shaping ability of manual ProTaper on mandibular second molars

作　　者：何俐[1] 范兵 胡图强[1] 边专 

机构地区：[1]郧阳医学院附属人民医院口腔医学研究所,442000 [2]武汉大学口腔医学院口腔生物医学工程教育部重点实验室

出　　处：《实用口腔医学杂志》2010年第1期117-119,共3页Journal of Practical Stomatology

摘　　要：通过比较2种根管形态下颌第二磨牙预备前后根管横断面面积的变化以探讨手用ProTaper器械预备的清理效果。选取具有融合牙根且根管为C形和2个独立牙根的下颌第二恒磨牙各20颗。使用改良Bramante模型在距根尖3、5.5、8 mm处横断,体视显微镜下拍摄手用ProTaper预备前后根管横断面形态。软件测量根管横断面面积并进行统计分析。结果显示S组与C组不同断面间两两比较不存在明显区别。结果说明根管的解剖形态对手用ProTaper预备后根管横断面面积的变化没有明显影响。Investigate the cleaning ability of manual ProTaper on mandibular second molars with C-shaped（c-shaped root） or normal root canal（separated root）.Twenty mandibular second molars with C-shaped root or with separated roots were sectioned at 3.0,5.5 and 8.0 mm from the root apex.The images of pre-preparation and F1,F2,and F3-prepapared of manual ProTaper were captured respectively.The cross-sectional areas of the canals were measured and the formula of area after treatment/area before treatment was used to calculate the area ratio.The data were analyzed by SPSS 10.0.The results showed that there was no statistically difference between cross-section root canal area ratios in two groups.Significant differences were found between the cross-section canal area ratio of F1 and F2,F1 and F3 at section 5 mm of S group,and F1 and F3 at section 3 mm of C group.The results suggested that the increasing of cross-section ratio of the two kinds of canals was not obviously concerned with their anatomical morphology.

关 键 词：下颌第二磨牙 C形根管 手用PROTAPER 

分 类 号：R781.05[医药卫生—口腔医学]