副根管的实验观察及其临床意义

Incidence and Clinical Significance of Accessory Canals in Permanent Molars

目的 观察副根管的发生率。方法 利用透明标本的制作及 0 .5 %碱性品红在髓室底的渗入情况 ,判断副根管的有无。结果 透明标本与染料渗入法显示第一、二恒磨牙副根管的发生率分别为 12 .96 %、2 0 .45 %,经卡方检验 ,两者差异无显著性。结论 副根管是药物渗漏及致病菌侵犯的通道 ,临床诊疗时应予以考虑。

Objective To determine the incidence of patent accessory canals in permanent molars.Methods Qualified 98 1 st and 2 nd molars were collected and divided into 2 groups,being treated either by making transparent specimens or by exposing them to 0.5% basic fuchsin solution to find out the presence of dye in accessory canals.Results These tests revealed that first and second permanent molars demonstrated having a pant accessory canal at a rate of 12.96% and 20.45% respectively.No significance by χ 2?text was found between these two groups.Conclusion Patent accessory canals are channels for drug leakage and bacterial invasion.Clinicians should notice these features.