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学科主题: 口腔医学
题名:
三种方法预备下颌第二磨牙C形根管成形效果的比较
其他题名: Comparative study of shaping efficiency in C-shaped canals of mandibular second molars
作者: 周欣; 马琦; 尹兴喆; 张成飞
关键词: 牙髓腔 ; 根管制备 ; 牙科高速技术 ; Dental pulp cavity ; Root canal preparation ; Dental high-speed technique
刊名: 中华口腔医学杂志
发表日期: 2008
DOI: 10.3321/j.issn:1002-0098.2008.03.007
卷: 43, 期:3, 页:151-153
收录类别: 中国科技核心期刊 ; 中文核心期刊 ; CSCD
文章类型: Journal Article
摘要: 目的 评价3种常用根管预备方法对C形根管的成形效果,为临床治疗提供参考.方法 对临床拔除的具有C形根管的下颌第二恒磨牙60颗,应用改良Bramante技术,于距根尖2mm、5 mm和8mm处将牙根横断.选择手用不锈钢K锉逐步后退技术(Step-Back组)、逐步深入技术(Step-Down组)和机用旋转镍钛锉ProTaperTM系列冠向下预备技术(Crown-Down组)预备不同类型的C形根管,比较预备前后根管横截面形态的数码图像,对3种不同方法的成形效果进行评价.结果 3种方法预备离体下颌第二磨牙C形根管后均有遗漏.不锈钢K锉逐步后退技术和不锈钢K锉逐步深入技术分别在根冠部[遗漏面积百分比分别为(0.177±0.071)%、(0.068±0.074)%]和根尖部[遗漏面积百分比分别为(0.236±0.167)%、(0.295±0.171)%]遗漏较少(P<0.05).CⅠ、CⅡ型遗漏出现在近远中多于颊舌侧,将其分为独立的2~3个根管预备可减少遗漏.不同方法预备根尖区的遗漏均显著高于根管中上部(P<0.05).结论 早期开敞根管上段,将C形根管分为2~3个独立的根管进行预备,可以增进根管预备的成形效果. Objective To investigate the shaping efficiency of three instrumentation techniques in the C-shaped canals.Methods Sixty extracted mandibular second molars with C-shaped canals were selected and cross-sectioned at 2,5,8 mm from the apex by using a muffle system as described by Bramante.The teeth containing C-shaped canals were randomly divided into three groups,respectively instrumented using stainless steel K-files in step-back and step-down techniques.and ProTaperTM series in crown-down technique.The digital images of canal cross-sections pre-and post-instrumentation were photographed to evaluate the proportion and position of uninstrumented area.Working length loss and perforation were recorded.Data were analyzed using ANOVA.Results Step-down technique gained smaller uninstrumented area in the coronal third of the canals,while step-beck technique gained the same results in the apical third(P<0.05).Uninstrumented proportion in apical part was significantly higher than in the middle and the coronal(P<0.05).Instrumenting type Ⅰ canal as 2 or 3 separated canals Was likely to reduce the miss.There were three perforations in manual stainless steel K-file groups.Conclusions Early opening the coronal part of C-shaped canal,shaping C-shaped canal as two or three separated canals and instrumenting the apical part with step-back technique,seemed to be the effective methods to avoid miss.
语种: 中文
原文出处: 查看原文
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内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/71949
Appears in Collections:北京大学第三临床医学院_口腔科_期刊论文

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作者单位: 1.北京大学第三医院口腔科,100083
2.北京大学口腔医学院·
3.口腔医院特诊科,100081

Recommended Citation:
周欣,马琦,尹兴喆,等. 三种方法预备下颌第二磨牙C形根管成形效果的比较[J]. 中华口腔医学杂志,2008,43(3):151-153.
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