前牙冠桩折断的掏桩体会滨州医学院附属医院口腔修复科（２５６６０３）张晓明惠敏桩冠是修复牙体缺损的重要方法之一，当牙冠大部分破坏时，临床上通常用桩冠修复。桩冠的失败常见于冠桩与非金属部分的脱离，冠桩的脱位等，但由于冠桩过细、机械强度差；再加上冠桩的疲劳... Denture crown fracture of the front of the denture Drills Binzhou Medical College Hospital Affiliated Hospital of Dentistry (256603) Zhang Xiaoming Hui Min crown is an important method to repair dental defects, most of the destruction of the crown, the clinic is usually used pile Crown repair. The failure of pile crown is common in the separation of crown and non-metallic parts, the crown pile dislocation, etc., but due to the crown is too thin, the mechanical strength is poor;