Department of Prosthodontics, University of Heidelberg, Heidelberg, Germany.
Clin Implant Dent Relat Res. 2012 May;14 Suppl 1:e119-25. doi: 10.1111/j.1708-8208.2011.00388.x. Epub 2011 Oct 10.
The objective of this retrospective study was to compare the incidence of chipping of implant-supported, all-ceramic, and metal-ceramic single crowns.
One hundred fifty-three patients (51.7% male, mean age 55.0 years) received 232 cemented implant-supported single crowns. One hundred and seventy-nine crowns had a metal framework (gold alloy) and 53 crowns were all-ceramic (zirconia framework and glass-ceramic veneer material). Age, gender, kind of cementation, and location of the restorations were assessed as possible factors affecting chipping.
During the observation period of up to 5.8 years (mean 2.1 years; standard deviation 1.4), a total of 13 (24.5%) all-ceramic and 17 (9.5%) metal-ceramic crowns suffered from chipping, a difference that was statistically significant. A total of ten single crowns had to be remade resulting in survival of 86.8% (all-ceramic) and 98.3% (metal-ceramic). The other possible factors did not have a significant effect on the chipping.
Chipping was found to be more frequent for all-ceramic implant-supported single crowns. If the reasons for the vulnerability of all-ceramic crowns remain unknown, implants with all-ceramic single crowns should generally be recommended with care.
本回顾性研究的目的是比较种植体支持的全瓷和金属陶瓷单冠的崩瓷发生率。
153 名患者（51.7%为男性，平均年龄 55.0 岁）接受了 232 个粘结固位的种植体支持的单冠修复。179 个冠有金属基底（金合金），53 个冠为全瓷（氧化锆基底和玻璃陶瓷贴面材料）。评估年龄、性别、粘结类型和修复体位置等因素是否为影响崩瓷的可能因素。
在最长 5.8 年（平均 2.1 年；标准差 1.4）的观察期内，共有 13 个（24.5%）全瓷冠和 17 个（9.5%）金属陶瓷冠发生崩瓷，差异具有统计学意义。共有 10 个单冠需要重新制作，全瓷冠的存活率为 86.8%（全瓷冠）和 98.3%（金属陶瓷冠）。其他可能的因素对崩瓷没有显著影响。
全瓷种植体支持的单冠崩瓷发生率更高。如果全瓷冠易损的原因仍不清楚，一般应谨慎推荐使用全瓷单冠种植体。
