Methods Ninety-five lower first molars with buccolingual vertical fracture were separated and cut vertically along the fracture line to exposure the proximal and distal residual roots.

• 方法选取95例颊舌方向纵折之下颌第一磨牙病例,完全纵剖牙冠及髓室底,获得独立的近远中残根,完整的根管治疗后,行桩核和烤瓷熔附金属全冠修复,3年后进行临床评价。