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目的 观察曲面断层片分析粤北地区人群下颌第二恒磨牙C形根管的发生率。方法 3名医生对856例曲面断层片的下颌第二磨牙牙根按照C形根管X线诊断标准进行诊断并记录。结果 856例患者中有365例646颗第二磨牙具有C形根管系统,发生率为38.13%。其中男性病例168例296颗,女性病例197例350颗,发生率分别为36.6%和39.5%。C形根管系统的发生没有显著的性别差异(P>0.05)。结论 C形根管系统在粤北地区人群下颌第二磨牙中具有较高的发生率,对其解剖形态进行研究具有重要的临床意义。
Objective To observe the incidence of C-shaped root canal in the second permanent molars of the northern part of Guangdong in curved surface tomography. Methods Three doctors diagnosed and recorded the second molar root of the mandibular second molar in 856 cases with curved surface slice. Results Of the 856 patients, 365 cases with 646 second molars had a C-shaped root canal system, with a prevalence of 38.13%. Among them, there were 168 male cases, 296 male cases and 350 female cases, the incidence rates were 36.6% and 39.5% respectively. There was no significant gender difference in the occurrence of C-shaped root canal system (P> 0.05). Conclusions C-shaped root canal system has a high incidence in mandibular second molars in northern Guangdong. It is of great clinical significance to study its anatomical morphology.