Department of Oral Surgery, Bernhard Gottlieb School of Dentistry, Medical University of Vienna, Vienna, Austria.
J Clin Periodontol. 2011 Sep;38(9):856-63. doi: 10.1111/j.1600-051X.2011.01750.x. Epub 2011 Jul 3.
To test the null hypothesis of no difference in failure rates of short (minimum length: 7 mm) and longer dental implants (≥ 10 mm), a meta-analysis was performed on prospective observational trials.
A systematic electronic and hand search was performed to identify eligible studies. Having additional data supplied by the authors, 54 publications were included (19,083 implants).
In case of mandibular implants, the null hypothesis of no impact of reduced implant length on failure within the first year of prosthetic loading could not be rejected. A significant impact of implant length could be substantiated for short machined implants in the anterior [odds ratio (OR) 5.4] and posterior maxilla (OR 3.4), while short rough-surfaced implants demonstrated increased failure rates in the anterior maxillary sites. No influence of implant diameter and denture type on the failure rate of short implants could be revealed.
In areas of reduced alveolar bone height the use of short dental implants may reduce the need for invasive bone augmentation procedures.
为了检验短（最短长度：7 毫米）和较长（≥10 毫米）牙科种植体在失败率方面无差异的零假设，对前瞻性观察试验进行了荟萃分析。
系统地进行了电子和手工检索，以确定合格的研究。在作者提供了其他数据后，纳入了 54 篇出版物（19083 个种植体）。
在下颌种植体的情况下，不能拒绝在修复加载后的第一年，较短的种植体长度对失败没有影响的零假设。在前部[比值比（OR）5.4]和上颌后部，短的机械加工种植体的长度对短种植体的失败具有显著影响，而在前部上颌部位，粗糙表面的短种植体则显示出增加的失败率。不能揭示种植体直径和义齿类型对短种植体失败率的影响。
在牙槽骨高度降低的区域，使用短的牙科种植体可能会减少对侵入性骨增强手术的需求。
