Objective To study the effective method of early treatment on cracked tooth. Methods Sixty cracked teeth were randomly divided into Group A and Group B. Teeth of Group A were treated by means of occlusal adjustment and filling. Teeth of Group B were treated by employing porcelain complete veneer crown. Curative effect was evaluated every half a year and last 2 years. Results The achievement ratio of Group A and Group B was 53.33% and 83.33%. There was significant difference between them（P
