下颌第二磨牙（mandibular second molar）与下颌第一磨牙形态相似，根据牙合面形态可分为四尖型和五尖型。
下颌第二前磨牙 mandibular second premolar ; The Second Permanent Mandibular Premolar
释义下颌左第二前磨牙 Mandibular left second premolar tooth
结论：下颌第二磨牙根管变异较多。
Conclusion: The C-shape mandibular second molars would be detrimental to canals debridement and obturation.
目的：研究单根的下颌第二磨牙的根管形态。
Objective: to investigate the root canal anatomy of one-rooted mandibular second molars.
目的探索预备下颌第二磨牙C形根管的有效方法。
Objective To explore the effective method for C-shaped root canal preparation.
应用推荐