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下颌第 2 恒磨牙 C 型根管发生率及其一次性根管治疗的疗效研究

谭小兵,徐静舒,肖艳   

  1. 云南省第一人民医院口腔内科
  • 收稿日期:2014-02-18 修回日期:2014-06-27 出版日期:2014-11-15 发布日期:2014-11-15
  • 通讯作者: 谭小兵

Incidence of C-Shaped Root Canal Systems in Mandibular Second Permanent Molar and the Effect of One-Visit Root Canal Treatment

TAN Xiao bing,XU Jing shu,XIAO Yan   

  1. Department of Endodontics, First People’ s Hospital of Yunnan Province
  • Received:2014-02-18 Revised:2014-06-27 Published:2014-11-15 Online:2014-11-15
  • Contact: TAN Xiao bing

摘要:

【摘要】 目的 研究云南省第一人民医院患者下颌第 2 恒磨牙 C 型根管的发生率并比较其一次性或两次性根管治疗的成功率。 方法 选取本院口腔内科就诊患者 260 例下颌第 2 恒磨牙, X 线牙片和临床检查分析 C 型根管及各型发生率; C 型根管患牙随机分为 AB 2 组, 分别进行一次性和两次性根管治疗, 6 个月后比较 2 组成功率。 260 例中有 80 例为 C 型根管, 发生率为 30.77%; 术前 X 线检查发现 2 组患牙共有25 例(31.25%), 32例(40%), 23 例(28.75%); 改良 Melton 分类法发现 C1 17 例(21.25%)、C2 39 例(48.75%)、C3a 13 16.25%)、C3b 11 例(13.75%), C4 0 例; 术后 6 个月 A 组成功率为 78.94%30/38), B 组成功率为 81.08%30/37), 2 组间差异无统计学意义(P > 0.05)。 结论 我院患者下颌第 2 恒磨牙 C 型根管较常见, 一次性根管治疗可用于下颌第 2 恒磨牙C 型根管系统。
 

关键词: 下颌第二恒磨牙, C型根管, 一次性根管治疗

Abstract:

[Abstract]   Objective   To investigate the incidence of C-shaped root canal systems in mandibular second perma?
nent molar of patients in the First Peoples Hospital of Yunnan Province, and compare the success rate between one- and two-visit root canal treatment.   Methods   Two hundred and sixty mandibular second molars were recruited from the patients in the department of endodontics of our hospital, and teeth with C-shaped root canal were categorized by using radio?graphic classification criteria and the modified Meltons method. Teeth with C-shaped root canal systems were then randomly divided into two groups to receive one- or two-visit root canal treatment, and success rates of 6-month post-operation were compared between two groups.   Results   Eighty out of 260 mandibular second molars exhibited C-shaped canals (30.77%). Radiographic examination showed that 25 teeth belonged to type Ⅰ (31.25%), 32 teeth type Ⅱ (40.00%) and 23 teeth type Ⅲ (28.75%) in two groups. As for modified Meltons method, the incidence rates were 21.25%, 48.75%, 16.25% and 13.75% for C1,C2,C3a and C3b, respectively, while C4 was not found. The success rates were 78.94% (30/38) and 81.08% (30/37) for A group and B group, respectively, with no statistically significant difference between two groups (78.94 vs 81.08, P > 0.05).   Conclusion   Results indicate a frequent incidence of C-shaped root canal system of mandibular permanent second molars in our hospital. One-visit root canal treatment is an effective way for treating C-shaped canals in mandibular permanent second molar.

Key words: Mandibular second permanent molars, C-shaped root canal system, one-visit root canal treatment