Li Yu, Yang Pu, Fan Xiaofeng, Wang Jun, Liu Jun, Zhao Zhihe, Zhao Meiying
Department of Orthodontics, State Key Laboratory of Oral Diseases, West China Stomatology Hospital, Sichuan University, Chengdu 610041, Sichuan, PR China.
Med Hypotheses. 2009 Mar;72(3):276-9. doi: 10.1016/j.mehy.2008.08.029. Epub 2008 Dec 4.
Class II malocclusion is one of the most common orthodontic problems. The main aetiology of Class II malocclusion is mandibular retrognathia. A variety of functional appliances have been used to stimulate mandibular growth in adolescence, however, the effects remain unsatisfactory. Therefore, new approaches are in need to strengthen the effects of functional appliances. Static magnetic field (SMF), created by permanent magnets, has long been proven to be clinically safe and is well accepted as a practical and non-invasive therapy. Numerous experimental and clinical data suggest that exogenous SMF can make profound effects on a large variety of biological systems. There has been increasing interest in curing bone injuries with SMF. More recently, literatures shed light on the chondrogenic and osteogenic effects of SMF. SMF and functional appliances may well have a synergistic effect in mandibular growth promotion. Based on experimental results and theoretical analysis, it is hypothesized that SMF combined with functional appliances can enhance mandibular growth in Class II malocclusion. A practical clinical design is also put forward.
安氏II类错颌是最常见的正畸问题之一。安氏II类错颌的主要病因是下颌后缩。多种功能矫治器已被用于刺激青少年下颌生长，然而，效果仍不尽人意。因此，需要新的方法来增强功能矫治器的效果。由永磁体产生的静磁场（SMF）长期以来已被证明在临床上是安全的，并且作为一种实用的非侵入性疗法被广泛接受。大量实验和临床数据表明，外源性静磁场可对多种生物系统产生深远影响。用静磁场治疗骨损伤的兴趣日益增加。最近，文献揭示了静磁场的软骨生成和成骨作用。静磁场和功能矫治器在促进下颌生长方面很可能具有协同作用。基于实验结果和理论分析，推测静磁场联合功能矫治器可促进安氏II类错颌患者的下颌生长。同时还提出了一种实用的临床设计方案。
