烤瓷全冠直接修复活髓隐裂牙疗效观察

目的：探讨金属烤瓷冠直接修复活髓隐裂牙的疗效，以指导口腔临床对活髓隐裂牙的处理。方法：87例（132颗牙）隐裂牙患者按I临床症状分为轻微咬合痛组（24例，31颗牙，第1组）、一过性冷热刺激痛组（33例，56颗牙，第2组）、延续性冷热刺激痛组（30例，45颗牙，第3组）3组，直接进行全冠修复，观察修复1周、半年和1年后急性牙髓炎的发生率。结果：全冠修复1周，第1组治愈率为100％；第2组治愈率为91．0％，改善率为100．0％；第3组治愈率为69．6％，改善率为87．0％，失败率为13．0％。全冠修复半年，第1、2组治愈率为100．0％，第3组治愈率为80．0％，失败率为20．0％。全冠修复1年，第1、2组无变化，第3组治愈率为75．6％，失败率为24．4％。结论：对于轻微咬合痛和一过性冷热刺激痛的患牙，可以直接行烤瓷冠修复，对于有延续性冷热刺激痛的患牙，建议先进行根管治疗再行全冠修复。

Effect of porcelain crown on direct repair of cracked vital pulp teeth

Objective:To investigate the effect of porcelain crown on direct repair of cracked vital pulp teeth and to guide clinical treatment on cracked vital pulp teeth. Methods:One hundred thirty-two cracked teeth of 87 patients were divided into 3 groups according to clinical symptoms:group A(24 cases,31 teeth),mild pain at occlusion; group B:transient pain to cold stimulation (33 cases,56 teeth); group C:continuous pain to cold stimulation (30 cases,45 teeth) ; all teeth were undergoing whole crown repair,the incidence of acute pulpitis was observed after repair in 1 week,6 months and 1 year. Results:One week after the operation,the cure rate in group A,B and C was 100%,91.0% and 69.6% respectively,the improvement rate in group A,B was 100% and 87.0% respectively,the failure rate in group C was 13.0 %. Six months after the operation,the cure rate in group A,B and C was 100%,100% and 80.0 % respectively,the failure rate in group C was 20.0 %. One year after the operation,the cure rate in group A,B and C was 100%,100% and 75.6 % respectively,the failure rate in group C was 24.4 %. Conclusion:Direct repair with porcelain crown indicates cracked vital pulp teeth with mild pain at occlusion and transient pain to cold stimulation; the whole crown repair of cracked vital pulp teeth with continuous pain to cold stimulation is proposed to follow the root canal treatment.