Monje Alberto, Suarez Fernando, Galindo-Moreno Pablo, García-Nogales Agustín, Fu Jia-Hui, Wang Hom-Lay
Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.
Clin Oral Implants Res. 2014 Oct;25(10):1119-24. doi: 10.1111/clr.12236. Epub 2013 Aug 13.
This systematic review aimed to evaluate the effect of implant length on peri-implant marginal bone loss (MBL) and its associated influencing factors.
An electronic search of the PubMed and MEDLINE databases for relevant studies published in English from November 2006 to July 2012 was performed by one examiner (AM). Selected studies were randomized clinical trials, human experimental clinical trials or prospective studies (e.g., cohort as well as case series) with a clear aim of investigating marginal bone loss of short dental implants (<10 mm) supporting fixed prostheses. A random-effect meta-regression model was used to determine the relationship between the effect size mean MBL and the covariate "implant length." Additionally, a subgroup analysis, by means of a random-effect one-way ANOVA model, comparing mean MBL values at different levels of each factor ("type of connection" and "type of prostheses") was also performed.
The meta-regression of mean MBL on the moderator "implant length" was found to be insignificant (P = 0.633). Therefore, it could not be concluded that implant length had an effect on peri-implant MBL. In addition, standardized differences in mean MBL on the subgroups short (<10 mm) and standard (≥ 10 mm) implants, as determined by the meta-analysis (random-effect model), were found to be statistically insignificant (P = 0.222).
Within limitations of the present systematic review, it could be concluded that short dental implants (<10 mm) had similar peri-implant MBL as standard implants (≥ 10 mm) for implant-supported fixed prostheses.
本系统评价旨在评估种植体长度对种植体周围边缘骨吸收（MBL）的影响及其相关影响因素。
由一名研究者（AM）对PubMed和MEDLINE数据库进行电子检索，查找2006年11月至2012年7月期间发表的英文相关研究。入选研究为随机临床试验、人体实验临床试验或前瞻性研究（如队列研究以及病例系列研究），其明确目的是调查支持固定修复体的短牙种植体（<10 mm）的边缘骨吸收情况。采用随机效应元回归模型确定效应量平均MBL与协变量“种植体长度”之间的关系。此外，还通过随机效应单因素方差分析模型进行亚组分析，比较各因素（“连接类型”和“修复体类型”）不同水平下的平均MBL值。
发现平均MBL关于调节变量“种植体长度”的元回归无统计学意义（P = 0.633）。因此，不能得出种植体长度对种植体周围MBL有影响的结论。此外，通过荟萃分析（随机效应模型）确定，短种植体（<10 mm）和标准种植体（≥10 mm）亚组的平均MBL标准化差异无统计学意义（P = 0.222）。
在本系统评价的局限性范围内，可以得出结论，对于种植体支持的固定修复体，短牙种植体（<10 mm）与标准种植体（≥10 mm）具有相似的种植体周围MBL。
