| 不同根管器械预备弯曲根管的实验研究 |
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| 引用本文： | 殷凌云,谢晓莉,陈敏憨,刘柳慧,凌天牖.不同根管器械预备弯曲根管的实验研究[J].华西口腔医学杂志,2008,26(6):660-663. |
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| 作者姓名： | 殷凌云 谢晓莉 陈敏憨 刘柳慧 凌天牖 |
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| 作者单位： | 中南大学湘雅医院口腔科， 湖南长沙410008 |
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| 基金项目： | 湖南省科技厅科研基金资助项目
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湖南省卫生厅基金资助项目
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| 摘 要： | 目的比较手用不锈钢K锉、手用ProTaper锉、机用ProTaper锉在预备中、重度弯曲根管时的成形能力及其对根尖孔形态特征的影响。方法将40个树脂根管模型分为A、B、C、D组，A、B、C组各12个树脂根管模型，其中每组20°根管和30°根管各6个；D组4个树脂根管模型，均为小于5°根管。分别以手用不锈钢K锉、手用ProTaper锉、机用ProTaper锉预备根管，数码相机摄片，运用专业图像分析软件Auto-CAD比较根管偏移及根尖孔形态。结果B组中轴偏移明显高于A组和C组（P<0.05），其中C组与A组在个别根管段有显著差异（P<0.05）。预备后根尖孔B组各项值均显著高于其他各组，B3组根管值显著高于B2组（P<0.05）。相同根管弯曲度下C组值高于A组；不同弯曲度下30°根管值高于20°根管值，但均无显著性差异（P>0.05）。结论两种镍钛器械均产生根管偏移，根管弯曲度是偏移产生的主要原因；与不锈钢器械相比，镍钛器械能较好地保持原根管走向及根尖孔形态。
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| 关 键 词： | 根管预备 根管偏移 模拟树脂根管 ProTaper锉 不锈钢K锉 |
| 收稿时间： | 2008-12-25 |
| 修稿时间： | 2008-12-25 |
Experimental study of preparing curved root canals with different instrument |
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| YIN Ling-yun,XIE Xiao-li,CHEN Min-min,LIU Liu-hui,LING Tian-you.Experimental study of preparing curved root canals with different instrument[J].West China Journal of Stomatology,2008,26(6):660-663. |
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| Authors: | YIN Ling-yun XIE Xiao-li CHEN Min-min LIU Liu-hui LING Tian-you |
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| Affiliation: | Dept. of Stomatology, Xiangya Hospital, Central South University, Changsha 410008, China |
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| Abstract: | Objective To compare the shaping ability and the influence on apical foramen among hand ProTaper, stainless steel K-files and rotary ProTaper in preparing different curved root canal. Methods Forty simulated resin root canal blocks were randomly divided into four groups and prepared by hand ProTaper, stainless steel K-file and rotary ProTaper, respectively. Of them, 12 blocks in group A, B, C consist of six 20° curved root canals and six 30° curved root canals each group. The curvature of the other 4 blocks in group D was less than 5°. Taking photos of the models to the root canal orthotopically and apical foramen using digital camera before and after instrumentation. Finally, the transportation of root canal and the size of apical foramen were analyzed using special image software Auto-CAD. Results The transportation of center in group B was the highest than that in group A and group C（P<0.05）. In some portions of root canal, the transportation of center in group C was higher than that in group A. The size of the apical foramen in group B was significantly bigger than the other groups and the size of the apical foramen in 30° root canal was significantly bigger than that in 20° root canal after instrumentation（P< 0.05）. There was no significantly different between group A and group C, though the size of apical foramen in group C was bigger than that in group A at the same curvature, and that in 30° root canal was bigger than in 20° root canal（P＞0.05）. Conclusion Both of the two instruments engender root canal transportation, and curvature is the main reason of transportation. Comparing with stainless steel K-files, NiTi files can maintain the shape of the root canal and apical foramen well. |
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| Keywords: | root canal preparation the transportation of root canal simulated resin root canal ProTaper file stainless steel K-files |
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