Int J Prosthodont. 2016 May-Jun;29(3):233-44. doi: 10.11607/ijp.4349.
This systematic review aimed to evaluate whether the survival rate and predictability of zirconia abutments are similar to those of titanium abutments for single implant crowns in the posterior area.
A systematic search of two databases (Medline/PubMed and Cochrane Library) was performed by two independent reviewers for articles published between January 2004 and July 2014. The electronic search was complemented by a hand search of the following journals from the same period: Journal of Periodontology, Clinical Oral Implants Research, International Journal of Prosthodontics, and International Journal of Oral and Maxillofacial Implants. Studies included were published in English, evaluated single implant crowns, and performed a mean observation ≥ 1 year. Any disagreement between the reviewers was solved by means of a discussion. Forest plot and funnel were used to compare zirconia and titanium abutments.
The search strategy identified 669 studies. Of these, 11 studies were included and only 6 studies were selected for meta-analysis. The pooled results for fixed implant single crowns in posterior areas showed a 5-year success rate of 99.3% for zirconia abutments and 99.57% for titanium abutments. There was no statistical difference regarding veneer failure (P = .26). The pooled results of these studies showed that the mean bone loss was 0.38 ± 0.87 mm for zirconia and 0.2 ± 0.13 mm for titanium abutments.
The use of zirconia abutments for single implant-fixed crowns in posterior regions is questionable due to the absence of long-term data. The short-term results of zirconia abutments regarding mechanical and biologic responses are similar to titanium abutments. Caution when using zirconia abutments in posterior regions is necessary until further clinical evidence shows favorable long-term results.
本系统评价旨在评估在后牙区，氧化锆基台的存活率和可预测性是否与钛基台相似，用于单牙种植体冠修复。
两名独立的评价者对 2004 年 1 月至 2014 年 7 月发表的文章进行了两个数据库（Medline/PubMed 和 Cochrane Library）的系统检索。电子检索通过同期以下杂志的手工检索进行补充：《牙周病学杂志》、《临床口腔种植研究杂志》、《国际口腔修复学杂志》和《国际口腔颌面种植学杂志》。纳入的研究为英文发表，评估单牙种植体冠，并进行了至少 1 年的平均观察。评价者之间的任何分歧都通过讨论来解决。森林图和漏斗图用于比较氧化锆和钛基台。
搜索策略确定了 669 项研究。其中，11 项研究被纳入，只有 6 项研究被纳入荟萃分析。在后牙区固定种植体单冠的汇总结果显示，氧化锆基台的 5 年成功率为 99.3%，钛基台为 99.57%。在贴面失败方面没有统计学差异（P=0.26）。这些研究的汇总结果表明，氧化锆基台的平均骨丢失为 0.38±0.87mm，钛基台为 0.2±0.13mm。
由于缺乏长期数据，在后牙区使用氧化锆基台用于单牙种植体固定冠修复是值得怀疑的。氧化锆基台在机械和生物学反应方面的短期结果与钛基台相似。在后牙区使用氧化锆基台时需要谨慎，直到进一步的临床证据显示出有利的长期结果。
