Halimi Abdelali, Benyahia Hicham, Doukkali Anas, Azeroual Mohamed-Faouzi, Zaoui Fatima
University Mohammed V-Souissi (UM5S), Oral Biomechanics and Biotechnology Research Unit, Dentofacial Orthopedics Department, College of Dental Medicine, centre hospitalier Ibn-Sina, BP 6212, Rabat-Instituts, Madinat Al Irfane, Rabat, Morocco.
Int Orthod. 2012 Sep;10(3):223-40. doi: 10.1016/j.ortho.2012.06.013. Epub 2012 Aug 18.
Elastomeric chains are one of several devices used to provide force for orthodontic tooth movement, but the force they exert diminishes over time and can thus be difficult to control. The objective of this investigation was to provide a systematic review of publications pertinent to force decay in orthodontic elastomeric chains.
A systematic review was performed via electronic querying of multiple databases for the period 1970-2011. Queries were limited to a set of specific keywords in two languages (English and French). Five main reviews were consulted manually to identify relevant publications. Two investigators sorted out those studies that complied with selection criteria.
A total of 53 studies were found to be relevant to force decay in elastomeric chains, including 22 on force decay over time, seven on the force consequences of pre-stretching, 12 on the impact of the environment on the force delivered, and 11 on clinical efficacy.
The force delivered by elastomeric chains decays rapidly over time, affecting their mechanical properties and clinical efficacy when studied in either human saliva or laboratory test media.
弹性链是用于为正畸牙齿移动提供力的多种装置之一，但其施加的力会随时间衰减，因此难以控制。本研究的目的是对与正畸弹性链力衰减相关的文献进行系统综述。
通过对多个数据库进行1970 - 2011年期间的电子查询进行系统综述。查询仅限于两种语言（英语和法语）的一组特定关键词。手动查阅了五项主要综述以识别相关文献。两名研究人员筛选出符合选择标准的研究。
共发现53项与弹性链力衰减相关的研究，包括22项关于力随时间衰减的研究、7项关于预拉伸的力效应的研究、12项关于环境对传递力的影响的研究以及11项关于临床疗效的研究。
弹性链传递的力随时间迅速衰减，在人体唾液或实验室测试介质中进行研究时，会影响其力学性能和临床疗效。
