Department of Prosthetic Dentistry and Oral Function, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, Oslo, Norway.
Clin Oral Implants Res. 2011 Nov;22(11):1308-14. doi: 10.1111/j.1600-0501.2010.02114.x. Epub 2011 Mar 8.
To evaluate the clinical outcome of custom-made zirconia abutments for implant-supported single-tooth restorations up to 5 years after insertion.
The study comprises two parts: (Part 1) retrospective evaluation of records of 130 patients treated with 185 single-tooth implant restorations using zirconia abutments; (Part 2) clinical examination of 25 patients with 40 restorations placed >3 years ago. Oral surgeons placed the implants. The prosthodontic treatment was provided at a prosthodontic specialist clinic. The restoration was either an all-ceramic crown for cementation or a screw-retained one-piece restoration with the veneering porcelain baked directly to the zirconia abutment. Registration of all patients' records comprised clinical and radiographic data from insertion of the restoration up to the last visit at the clinic.
Parts 1 and 2: The zirconia abutments performed well over the follow-up period. The rates of both technical and biological complications were low, and the patients were in general extremely satisfied with the restorations. No all-ceramic crowns fractured during the observation period. Two abutments (1%) fractured, one at insertion, the other after 2 months. Part 2: There were no significant differences for changes in any of the soft tissue registrations or the peri-implant marginal bone level between the conventional two-piece abutment-crown restoration and the one-piece restoration. The peri-implant bone level changes from placement to the clinical examination 3-5 years later were small (mean 0.29 mm, SD 0.87 mm).
Zirconia abutments for single-implant crowns seem to demonstrate good short-term technical and biological results.
评估种植体支持的单颗牙修复体使用定制氧化锆基台 5 年的临床效果。
本研究包括两部分：（第 1 部分）回顾性评估 130 名患者的 185 颗种植体单颗牙修复体使用氧化锆基台的记录；（第 2 部分）对 3 年以上的 25 名患者的 40 个修复体进行临床检查。口腔外科医生植入种植体。修复体由修复专家诊所提供。修复体为粘结固位的全瓷冠或直接烧结到氧化锆基台上的烤瓷贴面的螺丝固位单冠。所有患者记录的注册均包括从修复体植入到诊所最后一次就诊的临床和影像学数据。
第 1 部分和第 2 部分：氧化锆基台在随访期间表现良好。技术和生物并发症的发生率均较低，患者总体对修复体非常满意。在观察期间没有全瓷冠断裂。有 2 个基台（1%）断裂，1 个在植入时，另 1 个在植入后 2 个月。第 2 部分：常规的两段式基台-冠修复体和一体式修复体的软组织和种植体边缘骨水平的任何变化均无显著差异。从种植体放置到临床检查 3-5 年后的种植体边缘骨水平变化较小（平均 0.29 毫米，标准差 0.87 毫米）。
氧化锆基台用于单颗牙冠似乎显示出良好的短期技术和生物学效果。
