下颌前磨牙双牙根发生率的全口根尖片研究
发布时间：2019-06-11 00:30
【摘要】：研究目的： 应用全口根尖片统计分析中国人下颌第一前磨牙和第二前磨牙双牙根的发生率,尤其是双侧同时发生双根的概率,为临床进行下颌第一、二前磨牙的根管治疗和修复提供解剖依据。 材料和方法： 随机抽取2011年4月至2012年4月就诊于北京大学口腔医院的中国人患者的全口根尖片,共2015例。2名有20年临床工作经验的口腔科医生,包括1名牙体牙髓主任医师和1名口腔颌面影像诊断学主任医师以及1名牙体牙髓专业在读研究生对这2015例全口根尖片进行诊断,分别记录下颌第一二前磨牙近远中向双根,颊舌向双根,其中包括确定的颊舌向双根及疑似的颊舌向双根；记录下颌第一、二前磨牙双根发生的病例数、牙数。统计下颌第一、二前磨牙双牙根的发生率尤其是双侧同时发生双牙根的概率。3名医师同时进行诊断,有疑问的病例三人共同读片讨论达成共识。 结果： 1.下颌第一前磨牙双牙根发生率统计 2015例全口根尖片中,除去5例双侧缺失的下颌第一前磨牙,共2010例全口根尖片入选,除去48例单侧缺失的下颌第一前磨牙外,牙齿总数为3972颗。诊断的双牙根的病例数为120例,一共159颗牙齿,双侧同时发生双根的病例数是39例。按照牙齿数统计,下颌第一前磨牙双牙根发生率为4.03%(159/3972)；双侧同时发生双牙根的概率为32.5%(39/120)。 2.下颌第二前磨牙双牙根发生率统计 2015例全口根尖片中,除去17例双侧缺失的下颌第二前磨牙,共1998例全口根尖片入选,除去116例单侧缺失的下颌第二前磨牙外,牙齿总数为3880颗。诊断的双牙根的病例数为24例,一共33颗牙齿,双侧同时发生双根的病例数是9例。按照牙齿数统计,下颌第二前磨牙双牙根发生率为0.85%(33/3880)；双侧同时发生双牙根的概率为37.5%(9/24)。 结论： 通过本研究作者认为,虽然不同地区学者研究得出的双根发生率不尽相同,但是可以肯定的是,下颌前磨牙具有一定的双根发生率。在根管治疗操作以及口腔外科操作前,一定要考虑到有牙根变异情况的出现,根管治疗是目前治疗牙髓根尖周病最有效的方法,其原理是对复杂的根管系统进行彻底的清洁、消毒并充填,杜绝感染的再发生。牙根解剖变异的出现无疑是增加了根管治疗以及操作的难度,临床上许多根管治疗失败的病例,一方面是由于术者对牙根解剖变异认识的不足,另-方面是术者不能辨认出其变异。因此,对牙根形态特征及其变异表征的系统研究具有一定的临床意义。术前对牙根变异的了解,仔细阅读术前X线片,结合临床髓室底探查,适当改变根管的入路,都是根管治疗成功必不可少的步骤。
[Abstract]:Objective: to analyze the incidence of mandibular first premolars and second premolars in Chinese by whole apical radiography, especially the probability of bilateral simultaneous occurrence of double roots. Root canal therapy and restoration of two premolars provide anatomical basis. Materials and methods: a total of 2015 Chinese patients from April 2011 to April 2012 in Peking University Stomatological Hospital were randomly selected. Two stomatologists with 20 years of clinical work experience were randomly selected. Including 1 chief dental pulp physician, 1 oral and maxillofacial imaging diagnostics chief physician and 1 graduate student majoring in dental pulp, the 2015 cases of whole oral apical film were diagnosed, and the mandibular first and second premolars were recorded. Buccal tongue to double root, including confirmed buccal tongue to double root and suspected buccal tongue to double root; The number of cases and teeth of the first and second premolars were recorded. The incidence of double roots of mandibular first and second premolars, especially the probability of bilateral double roots occurred at the same time, was counted. Three doctors diagnosed at the same time, and three of the questionable cases were discussed together to reach a consensus. Result: 1. Statistics of the root incidence of mandibular first premolars in 2015 cases, 2010 cases of mandibular first premolars were selected except for 5 cases of bilateral missing mandibular first premolars, except 48 cases of unilateral missing mandibular first premolars. The total number of teeth is 3972. The number of cases of double roots diagnosed was 120 cases, a total of 159 teeth, and 39 cases of bilateral double roots occurred at the same time. According to the number of teeth, the incidence of double roots of mandibular first premolars was 4.03% (159 鈮，
本文编号：2496851
[Abstract]:Objective: to analyze the incidence of mandibular first premolars and second premolars in Chinese by whole apical radiography, especially the probability of bilateral simultaneous occurrence of double roots. Root canal therapy and restoration of two premolars provide anatomical basis. Materials and methods: a total of 2015 Chinese patients from April 2011 to April 2012 in Peking University Stomatological Hospital were randomly selected. Two stomatologists with 20 years of clinical work experience were randomly selected. Including 1 chief dental pulp physician, 1 oral and maxillofacial imaging diagnostics chief physician and 1 graduate student majoring in dental pulp, the 2015 cases of whole oral apical film were diagnosed, and the mandibular first and second premolars were recorded. Buccal tongue to double root, including confirmed buccal tongue to double root and suspected buccal tongue to double root; The number of cases and teeth of the first and second premolars were recorded. The incidence of double roots of mandibular first and second premolars, especially the probability of bilateral double roots occurred at the same time, was counted. Three doctors diagnosed at the same time, and three of the questionable cases were discussed together to reach a consensus. Result: 1. Statistics of the root incidence of mandibular first premolars in 2015 cases, 2010 cases of mandibular first premolars were selected except for 5 cases of bilateral missing mandibular first premolars, except 48 cases of unilateral missing mandibular first premolars. The total number of teeth is 3972. The number of cases of double roots diagnosed was 120 cases, a total of 159 teeth, and 39 cases of bilateral double roots occurred at the same time. According to the number of teeth, the incidence of double roots of mandibular first premolars was 4.03% (159 鈮，
本文编号：2496851
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