Clinical study of onlay treatment of cracked teeth with vital pulp / 重庆医学

ABSTRACT

Objective To investigate the effect of cobalt chromium alloy onlay on the direct repair of cracked vital pulp teeth with the resin compostie filling and porcelain-fused-to-metal (PFM ) crown repair as the control .Methods 201 cracked vital pulp teeth from 201 cases were randomly divided into 3 groups according to the clinical symptomsmild discomfort at occlusion (group A) ,pain at occlusion accompanied with transient pain to cold or hot stimulation (group B) and pain at occlusion accompanied with continuous pain to cold or hot stimulation(group C) .The cracked teeth directly were restored by the resin composite filling ,cobalt chromium alloy onlay and PFM crown repair and the effective rate in each group was observed after 2-year follow up .Results The effective rate of the group A ,B and C were statistically significant different from each other (P<0 .05) .The effective rate of the co-balt chromium alloy onlay and the PFM crown was statistically significant higher than that of resin composite (P<0 .05) .Conclusion The direct repair with cobalt chromium alloy onlay is an effective repair method for the cracked vital pulp teeth with mild discomfort at occlusion and mild pain accompanied with transient pain to cold or hot stimulation .