University of Barcelona, Spain.
Int J Oral Maxillofac Implants. 2010 Mar-Apr;25(2):336-44.
The aim of this study was to evaluate the 5-year success rate of zirconia (ZrO2) implants with three different kinds of surfaces.
One-piece zirconia dental implants (CeraRoot) with three different roughened surfaces were designed and manufactured for this study: coated, uncoated, and acid-etched. Five different implant designs were manufactured. Standard or flapless surgical procedures were used for implant placement. Simultaneous bone augmentation or sinus elevation was performed when bone height or width was insufficient. Definitive all-ceramic restorations were placed 4 months after implant placement (8 months or more for implants when bone augmentation or sinus elevation was performed). The implants were followed up to 5 years (mean, 3.40 +/- 0.21).
In all, 831 implants were placed in 378 patients with a mean age of 48 years. The overall implant success rate after 5 years of follow-up was 95% (92.77% for uncoated implants, 93.57% for coated implants, and 97.60% for acid-etched implants). The success rate of the acid-etched surface group was significantly better than that of the other two.
From this midterm investigation, it can be concluded that zirconia dental implants with roughened surfaces might be a viable alternative for tooth replacement. Further follow-up is needed to evaluate the long-term success rates of the implant surfaces studied.
本研究旨在评估三种不同表面处理的氧化锆（ZrO2）种植体的 5 年成功率。
本研究设计并制造了三种不同表面粗糙度的一体式氧化锆牙科种植体（CeraRoot）：涂层、未涂层和酸蚀。制造了五种不同的种植体设计。标准或无瓣手术程序用于植入物的放置。当骨高度或宽度不足时，同时进行骨增量或窦提升。植入物放置 4 个月后（当进行骨增量或窦提升时，植入物放置 8 个月或更长时间）进行最终的全陶瓷修复。对这些植入物进行了长达 5 年的随访（平均 3.40 +/- 0.21）。
总共在 378 名平均年龄为 48 岁的患者中放置了 831 个种植体。5 年随访后，总体种植体成功率为 95%（未涂层种植体为 92.77%，涂层种植体为 93.57%，酸蚀种植体为 97.60%）。酸蚀表面组的成功率明显优于其他两组。
从这项中期研究可以得出结论，表面粗糙的氧化锆牙科种植体可能是替代牙齿的可行选择。需要进一步的随访来评估所研究的种植体表面的长期成功率。
