粤北地区人群下颌第二磨牙C形根管发生的临床调查

A survey of the incidence of C-shaped root canal system in mandibular second molars on native people of north Guangdong

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 investigate the incidence of C-shaped root canal system in mandibular second molars on native people of north Guangdong.Methods Three dentists diagnosed the root canals of mandibular second molars of 856 patients＇ panoramic radiographs according C-shaped root canal system was recorded.Results The number of mandibular second molars with C-shaped root canal system was 646 and the incidence was 38.13%.168 males（296 teeth）and 197 females（350 teeth）with C-shaped root canal system were investigated,the incidence in males and females were 36.6% and 39.5% respectively.There was no significantly difference between females and males（P0.05）.Conclusion The incidence of C-shaped root canal system in mandibular second molars is very high on native people of north Guangdong and it has an important clinical signification to study its anatomic configurations.