目的研究金属烤瓷冠修复后并发牙龈炎的原因并探讨其预防措施。方法对86例金属烤瓷冠修复后出现牙龈炎而导致修复失败的病例进行分析。结果修复体边缘不良占41.86%,修复体外形不佳占11.63%,邻接关系不良占23.26%,粘接材料残留占13.95%。结论为减少金属烤瓷冠修复后出现牙龈炎,应严格遵循设计原则和制作要求。 Objective To study the causes of gingivitis complicated with porcelain fused to metal crowns and to explore the preventive measures. Methods 86 cases of metal porcelain crowns after repair gingivitis caused repair failure cases were analyzed. Results The poor margins of the prosthesis accounted for 41.86%, the poor shape of the prosthesis accounted for 11.63%, the adjacent bad relations accounted for 23.26%, and the adhesive residue accounted for 13.95%. Conclusion To reduce the occurrence of gingivitis after the restoration of metal porcelain crowns, the design principles and production requirements should be strictly followed.