| 不同质量分数乙二胺四乙酸糊剂对根管壁不同区域玷污层的去除效果评价 |
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| 引用本文： | 张朝良,高姗姗,李燕. 不同质量分数乙二胺四乙酸糊剂对根管壁不同区域玷污层的去除效果评价[J]. 华西口腔医学杂志, 2010, 28(2): 149-152. DOI: 10.3969/j.issn.1000-1182.2010.02.009 |
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| 作者姓名： | 张朝良 高姗姗 李燕 |
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| 作者单位： | 口腔疾病研究国家重点实验室,四川大学,四川,成都,610041;口腔疾病研究国家重点实验室,四川大学,四川,成都,610041;口腔疾病研究国家重点实验室,四川大学,四川,成都,610041 |
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| 摘 要： | 目的研究不同质量分数乙二胺四乙酸（EDTA）糊剂去除根管壁玷污层的效果以及对根管壁的腐蚀作用。方法选择60颗离体单根管牙,用逐步后退法预备根管,预备后随机分成6组,采用不同质量分数的EDTA糊剂对根管进行处理,分别为5%、10%、15%、17%和20%EDTA糊剂,另设生理盐水组作为对照。处理时先将EDTA糊剂输送进根管内,作用3 min后以5.25%次氯酸钠溶液冲洗,次氯酸钠溶液用量为5 mL。处理后将牙根沿颊舌向纵向劈开,用扫描电镜观察根管壁不同部位玷污层的去除效果和牙本质的腐蚀状况,分别进行评分。结果随着EDTA糊剂质量分数的增加,对根冠1/3、根中1/3玷污层的去除效果明显增加。15%EDTA糊剂可以有效地去除根冠1/3和根中1/3的玷污层,根尖1/3去除效果稍差;对根管壁无明显的腐蚀破坏现象。17%和20%的EDTA糊剂对玷污层的去除效果明显,但对根管壁的结构造成了一定的腐蚀破坏。结论经不同质量分数的EDTA糊剂处理,根管壁玷污层的去除效果不同;质量分数大于17%的EDTA糊剂会对根管壁造成腐蚀。
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| 关 键 词： | 乙二胺四乙酸糊剂 玷污层 根管消毒 根管治疗 |
| 收稿时间： | 2010-04-25 |
| 修稿时间： | 2010-04-25 |
Effects of different concentrations of ethylenediamine tetraacetic acid paste on removing root canal smear layers |
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| ZHANG Chao-liang,GAO Shan-shan,LI Yan. Effects of different concentrations of ethylenediamine tetraacetic acid paste on removing root canal smear layers[J]. West China journal of stomatology, 2010, 28(2): 149-152. DOI: 10.3969/j.issn.1000-1182.2010.02.009 |
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| Authors: | ZHANG Chao-liang GAO Shan-shan LI Yan |
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| Affiliation: | State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China |
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| Abstract: | Objective To evaluate the effect of different concentrations of ethylenediamine tetraacetic acid(EDTA) paste on the removing root canal smear layers and the degrees of erosion on the surface of the root canal walls at the different portions of canal. Methods Sixty human teeth with single root were instrumented using step-back technique, then were divided into six groups and treated with different concentrations EDTA paste and NaClO solution. Group A: 0.9% saline; group B: 5.25% NaClO+5% EDTA; group C: 5.25% NaClO+10% EDTA; group D: 5.25% NaClO+15% EDTA; group E: 5.25% NaC1O+17% EDTA; group F: 5.25% NaClO+20% EDTA. Then the teeth were split, the root canals with different treatments were examined with scanning electron microscope at the coronal, middle and apical thirds for smear layers removal and the degrees of erosion. Results The effect of EDTA paste on removing smear layers at the coronal, middle thirds of the root canal increased with the concentrations. 15% EDTA paste could remove the smear layers at the coronal and middle thirds of the root canal, but the effect on apical third was invalid, and no erosion could be found in the root canal wall. 17% and 20% EDTA paste produced the erosion to the root canal wall. Conclusion The concentrations of the EDTA paste can influence the effect of the removing smear layers, and the concentration beyond 17% would produce the erosion to root canal wall. |
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| Keywords: | ethylenediamine tetraacetic acid paste smear layer root canal disinfection root canal therapy |
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