Abstract: Abstract： Objective To discuss the the clinical features treatment and prognosis analysis of cracked teeth. Methods: According to the degree of illness development, 190 cracked teeth were divided into normal cracked tooth pulp group (group A) including 64 teeth and dental pulp abnormal cracked tooth group (group B)including 126 teeth.According to the principle of treatment and the patient's own situation, different treatment methods were choosen, statistical analysis was carried out on the effect of 1 year after treatment. Results: The success rate of full crown restoration in group A was 78.9%, higher than the success rate of the occlusal adjustment and the tooth filling, difference was statistically significant( P﹤ 0.05). The success rate of full crown restoration in group B was 94.0%, significantly higher than the pure filling treatment success rate, the difference was statistically significant(P﹤0.05). Conclusion: It need early diagnosis and early treatment for Cracked teeth ,we must have accurate judgment of crack depth and scope.It can use full crown restoration for the maximum retention of teeth. Key words：tooth cracked; filling; crown

Key words: 【Key words】Tooth cracked, Filling , crown