因隐裂、死髓等原因造成磨牙牙冠纵折是牙体常见的并发症 ,如治疗不当将使患牙后期修复更为复杂、困难 ,甚至拔除患牙。 1995年开始 ,我们对磨牙纵折采用冠套修复 ,疗效良好。1　临床资料1 1　一般情况　 178例 (178牙 ) ,男 10 1例 ,女 77例。其中隐裂造成纵折 76例 ,死髓造成 Due to occult, dead marrow and other causes of molar tooth vertical occlusion is a common complication of teeth, such as improper treatment will make the teeth later repair more complex, difficult, or even remove the affected teeth. Beginning in 1995, we used molar crown restoration with a good curative effect. 1 Clinical data 1 1 178 cases of general (178 teeth), male 10 1 cases, female 77 cases. Including fractures caused longitudinal fracture in 76 cases, caused by the dead marrow