Ballullaya Srinidhi V, Vemuri Sayesh, Kumar Pabbati Ravi
Department of Conservative dentistry and Endodontics, St Joseph Dental College, Duggirala, Eluru, West Godavari District, India.
J Conserv Dent. 2013 Mar;16(2):99-110. doi: 10.4103/0972-0707.108176.
The success of root canal therapy depends on the locations of all the canals, thourough debridement and proper sealing. At times the clinicians are challenged with variations in morphology of root canal. This review article attempts to list out all the variations of permanent mandibular first molar published so for in the literature.
An exhaustive search was undertaken using PUBMED database to identify published literature from 1900 to 2010 relating to the root canal morphology of permanent first molar by using key words. The selected artcles were obtained and reviewed.
Total ninty seven articles were selected out of which 50 were original article and forty seven were case reports. The incidence of third canal in mesial root was 0.95% to 15%. The incidence of three rooted mandibular first molar was 3% to 33%. Only ninety cases reported with c-shape canal configuration. Incidence of Taurodintism without congenital disorder was very rare.
The root canal treatment requires proper knowlegde of variations in root canal morphology in order to recognise, disinfect and seal all portal of exit. This can be accomplished with proper diagnosis using newer modes, modification in access preparation, use of operating microscope, enhanced methods of disinfecting and sealing of all canals.
根管治疗的成功取决于所有根管的位置、彻底清创和恰当封闭。有时临床医生会面临根管形态变异的挑战。这篇综述文章试图列出迄今为止文献中已发表的关于恒牙下颌第一磨牙的所有变异情况。
利用关键词在PUBMED数据库中进行详尽检索，以识别1900年至2010年期间与恒牙第一磨牙根管形态相关的已发表文献。获取并审阅所选文章。
共选出97篇文章，其中50篇为原创文章，47篇为病例报告。近中根中第三根管的发生率为0.95%至15%。三根型下颌第一磨牙的发生率为3%至33%。仅有90例报告有C形根管形态。无先天性疾病的牛牙样牙的发生率非常罕见。
根管治疗需要正确了解根管形态的变异情况，以便识别、消毒和封闭所有出口通道。这可以通过使用更新的模式进行正确诊断、修改开髓预备、使用手术显微镜、改进所有根管的消毒和封闭方法来实现。
