| 郝艳红彭一纯梁洁徐英新李阅.下颌第二恒磨牙C 形根管的离体实验研究[J].,2011,11(13):2497-2498 |
| 下颌第二恒磨牙C 形根管的离体实验研究 |
| Study of C-Shaped Root Canals in Mandibular Second Molars in Vitro |
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| DOI： |
| 中文关键词: 下颌第二恒磨牙C 形根管，根尖区微渗漏 |
| 英文关键词: Mandibular second molars C-shape root canal Apical microleakage |
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| 中文摘要: |
| 目的：寻找一种预备C 形根管的有效器械，提高下颌第二恒磨牙的治愈率。方法：选用80 颗具有C 形根管的下颌第二恒磨
牙，选择四种器械进行根管预备，第一组用不锈钢K 锉，第二组用不锈钢K 锉和手用镍钛器械，第三组用机用镍钛器械，第四组用
超声根管治疗仪，预备中均用3%双氧水和生理盐水交替反复冲洗根管，预备后用Vitapex 糊剂和牙胶尖冷侧压方法充填根管，观
察根充后X 线片和根尖微渗漏情况，评价充填效果。结果：四种器械根充后微渗漏有明显差异（P<0.05）。结论：不锈钢K 锉和手用
镍钛器械联合应用及超声根管治疗仪为预备C 形根管的有效器械。 |
| 英文摘要: |
| Objective: The aim of this study was to search a kind of effective instrument for preparation the C-shaped root canals
and improve the healing rate of mandibular second molars. Methods: 80 mandibular second molars were extracted and randomly divided
into 4 experimental groups. Group 1 were prepared by SS-K file; group 2 were prepared by SS-K file combined PF, group 3 were
prepared by NT, group 4 were prepared by ultrasonic root canal instrumentation. All root canals were filled by warm vertical
condensation using Vitapex paste and gutta percha point. Effect of filling was evaluated by apical microleakage and digital X ray shows.
Results: Among the different instrumentations，the group 2 and group4 have the least microleakage．But there were no significant
difference between the group 2 and group 4 (P＞0.05). Conclusion: SS-k file combined PF or ultrasonic root canal instrumentation is the
effective instrument for preparing the C-shape root canals. |
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