上颌第一前磨牙三根管的临床检诊率

Clinical study of the incidence for about three canals in maxillary first premolares

目的:探讨上颌第一前磨牙三根管的临床检诊率以及根管显微镜在提高上颌第一前磨牙根管临床检诊中的作用。方法:选取进行常规根管治疗181颗上颌第一前磨牙,以及进行显微根管治疗的184颗上颌第一磨牙,每一病例均拍摄术前X线片,探查根管,并记录根管数目。结果:进行常规根管治疗和显微根管治疗的上颌第一前磨牙检出率分别为0.6%和4.3%,对上颌第一前磨牙常规根管治疗和显微根管治疗的三根管检测进行卡方检验,后者的检出率明显高于前者(P<0.001)。结论:根管显微镜有助于提高上颌第一前磨牙三根管的临床检诊,选择显微根管治疗有助于提升上颌磨牙根管治疗的成功率。

Objective To investigate the clinical incidence of three canals in maxilrthlary first premolars and the effect of dental operating microscope on locating three canals. Methods 181 maxillary first premolars treated without microscopes and 184 maxillary first premolars treated with microscope were examined.Each case was taken preoperative X ray-film,explored by small size K files and record the number of canals. Results The incidence rate was 0.6% in maxillary first premolars treated without microscope,The incidents rate was 4.3% treated with microscope.The incidence rate about three canals in maxillary first premolars between two treatment groups were significant different based by chi -square analysis （P 0.001）. Conclusion Identification of three canals in maxillary premolars is improved by microscope.More emphasis should be placed on the importance of using microscope for locating canals.