Department of General Dentistry, ChangGung Memorial Hospital at Taipei, Taipei, Taiwan.
Department of General Dentistry, ChangGung Memorial Hospital at Taipei, Taipei, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan; School of Dentistry, College of Medicine, China Medical University, Taichung, Taiwan.
Biomed J. 2019 Oct;42(5):358-364. doi: 10.1016/j.bj.2019.05.001. Epub 2019 Nov 1.
Clinical studies regarding zirconia implant abutments reported good survival rates in the short-term observation period. The purpose of this study was to assess the six-year clinical performance of zirconia abutments supporting all-ceramic crowns in anterior and premolar regions.
The patients received zirconia implant abutments to support all-ceramic crowns in Chang-Gung Medical Center during the period August 2010 to August 2011 were enrolled. In the following six years of observation period after the implant-crown had finished, the clinical parameters of all of the included patients were registered on a special form. The records regarding the following variables: age, gender, implant location, the condition of edentulous site before implant placement, esthetic performance at baseline, presence or absence of technical complications, and biological outcomes were registered and scrutinized for evaluation.
Out of the 32 zirconia implant abutments and 32 all-ceramic crowns that were followed for six years. Neither abutments nor crowns were lost, yielding 100% survival rates for both zirconia abutments and crowns. The esthetic outcomes were excellent except that a score of 2 was given to two restorations. With regard to technical complications, there was one instance of abutment screw loosening, two cases of veneering ceramic chipping, one restoration with occlusal roughness, and three instances of crowns loosening. Overall, the success rates were 96.8% and 81.2% for abutments and crowns respectively. In biological performance, only 1 implant was classified in group II (satisfactory survival) in the Misch classification, while all the others were classified in group I (excellent).
Zirconia abutments supporting all-ceramic crowns demonstrated high survival rate, good biological and esthetic results. While some technical complications were frequently observed, the complication-free rates were 96.8% for abutments and 81.2% for crowns in the medium-term observation period.
关于氧化锆种植体基台的临床研究报告显示，在短期观察期内具有良好的存活率。本研究的目的是评估在前牙和前磨牙区域中使用氧化锆基台支撑全瓷冠的六年临床效果。
在 2010 年 8 月至 2011 年 8 月期间，在长庚医疗中心接受氧化锆种植体基台以支撑全瓷冠的患者被纳入研究。在种植体-冠完成后的六年观察期内，所有纳入患者的临床参数均记录在特殊表格上。记录的变量包括：年龄、性别、种植体位置、种植前缺牙部位的状况、基线时的美观状况、是否存在技术并发症以及生物学结果，并进行了评估。
在随访六年的 32 个氧化锆种植体基台和 32 个全瓷冠中，基台和冠均未丢失，氧化锆基台和冠的存活率均为 100%。美学效果均为优秀，仅有 2 个修复体得分为 2 分。关于技术并发症，有 1 个基台螺丝松动，2 个饰面陶瓷崩瓷，1 个修复体有咬合不平整，3 个冠松动。总的来说，基台的成功率为 96.8%，冠的成功率为 81.2%。在生物学性能方面，Misch 分类中只有 1 个种植体被归类为 II 组（可接受的存活），而其余均被归类为 I 组（优秀）。
氧化锆基台支撑全瓷冠具有高存活率、良好的生物学和美学效果。虽然经常观察到一些技术并发症，但在中期观察期内，基台的无并发症率为 96.8%，冠的无并发症率为 81.2%。
