Santamaría-Villegas Adriana, Manrique-Hernandez Rubén, Alvarez-Varela Emery, Restrepo-Serna Claudia
CES-LPH Research Group, Universidad CES, Calle 10A. No. 22-04, Medellín, Colombia.
Universidad CES, Calle 10A. No. 22-04, Medellín, Colombia.
BMC Oral Health. 2017 Feb 1;17(1):52. doi: 10.1186/s12903-017-0339-8.
Orthopedic functional devices, are used to improve mandibular length in skeletal class II patients. However, the orthopedic functional device with the best effect to increasing the mandibular length, has not been identified before. Thus, the aim of the present investigation was to evaluate Randomized Controlled Trials (RCT), to determine the best functional appliance improving mandibular length in subjects with retrognathism.
A systematic review and meta-analysis was performed, including studies published and indexed in databases between 1966 and 2016. RCTs evaluating functional appliances' effects on mandibular length (Condilion-Gnation (Co-Gn) and Condilion-Pogonion (Co-Po)), were included. Reports' structure was evaluated according to 2010 CONSORT guide. The outcome measure was distance between Co-Gn and/or Co-Po after treatment. Data were analyzed with Cochran Q Test and random effects model.
Five studies were included in the meta-analysis. The overall difference in mandibular length was 1.53 mm (Confidence Interval (CI) 95% 1.15-1.92) in comparison to non-treated group. The Sander Bite Jumping reported the greatest increase in mandibular length (3.40 mm; CI 95% 1.69-5.11), followed by Twin Block, Bionator, Harvold Activator and Frankel devices.
All removable functional appliances, aiming to increase mandibular length, are useful. Sander Bite Jumping was observed to be the most effective device to improve the mandibular length.
矫形功能矫治器用于改善骨性II类患者的下颌长度。然而，此前尚未确定对增加下颌长度效果最佳的矫形功能矫治器。因此，本研究的目的是评估随机对照试验（RCT），以确定改善下颌后缩患者下颌长度的最佳功能矫治器。
进行了一项系统评价和荟萃分析，纳入了1966年至2016年期间在数据库中发表并被索引的研究。纳入评估功能矫治器对下颌长度（髁突-颏下点（Co-Gn）和髁突-颏前点（Co-Po））影响的随机对照试验。根据2010年CONSORT指南评估报告结构。结局指标是治疗后Co-Gn和/或Co-Po之间的距离。采用Cochran Q检验和随机效应模型分析数据。
荟萃分析纳入了五项研究。与未治疗组相比，下颌长度的总体差异为1.53毫米（95%置信区间（CI）1.15-1.92）。桑德咬合跳跃矫治器报告的下颌长度增加最大（3.40毫米；95%CI 1.69-5.11），其次是双阻板矫治器、生物调节器、哈沃德激活器和弗兰克尔矫治器。
所有旨在增加下颌长度的可摘功能矫治器都是有用的。观察到桑德咬合跳跃矫治器是改善下颌长度最有效的矫治器。
