二氧化锆全瓷冠与钴铬合金烤瓷冠在上颌前牙修复中的应用效果及其对病原菌的影响比较

目的 探讨二氧化锆全瓷冠与钴铬合金烤瓷冠在上颌前牙修复中的应用效果及其对病原菌的影响。方法 选取2019年1月—2020年6月在河北省眼科医院口腔科就诊的80例（80颗）上颌前牙缺损患者为研究对象，并随机分为对照组和观察组，每组40例。对照组采用钴铬合金烤瓷冠修复，观察组采用二氧化锆全瓷冠修复。12个月后，观察两组修复效果，牙龈炎症、出血情况，龈下菌斑标本病原菌检出情况及患者满意度。结果 修复12个月后，观察组较对照组边缘密合度好，修复体颜色与邻牙一致性好，继发龋少（P <0.05）。观察组较对照组牙龈炎症轻（P <0.05）。观察组较对照组牙龈出血少，牙周探诊深度浅（P <0.05）。观察组龈下菌斑标本牙龈卟啉单胞菌、具核梭形杆菌、福赛坦氏菌、伴放线放线杆菌检出率较对照组低（P <0.05）。观察组满意度较对照组高（P <0.05）。结论 相较于钴铬合金烤瓷冠修复，二氧化锆全瓷冠用于上颌前牙修复效果较好，对患者牙周组织及口腔内环境影响较小，有利于提升患者满意度。

Comparison of the effects of all-ceramic zirconia crowns and porcelain fused to cobalt-chromium alloy crowns in maxillary anterior teeth restoration and their impact on pathogens

Objective To investigate the effects of all-ceramic zirconia crowns and porcelain fused to cobalt-chromium alloy crowns in maxillary anterior teeth restoration and their impact on pathogens.Methods A total of 80 patients with defects in maxillary anterior teeth (80 teeth) in the Department of Stomatology of Hebei Eye Hospital from January 2019 to June 2020 were included and randomly divided into the control group (n = 40) and observation group (n = 40). The porcelain fused to cobalt-chromium alloy crowns and all-ceramic zirconia crowns were applied for patients in the control group and the observation group, respectively. After 12 months, the prosthetic effect, periodontal indexes, detection rates of pathogens in the subgingival plaque samples and patient satisfaction were evaluated.Results Twelve months following the restoration, the tightness between the crowns and the defected teeth and the color of the prostheses were better, and the incidence of secondary caries was lower in the observation group compared with the control group (P < 0.05). The grade of gingival inflammation index in the observation group was milder than that in the control group (P < 0.05). The gingival bleeding index and periodontal probing depth in the observation group were lower than those in the control group (P < 0.05). The detection rates of Porphyromonas gingivalis (Pg), Fusobacterium nucleatum (Fn), Tannerella forsythia (Tf) and Actinobacillus actinomycetemcomitans (Aa) in subgingival plaque samples in the observation group were lower than those in the control group (P < 0.05). In addition, the satisfaction of the observation group was higher than that of the control group (P < 0.05).Conclusions Compared with porcelain fused to cobalt-chromium alloy crowns, all-ceramic zirconia crowns exhibit better effects in maxillary anterior teeth restoration, have less impacts on the periodontal tissues and the oral environment, and improve the patients'' satisfaction.