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首页> 外文期刊>The Journal of clinical pediatric dentistry >Expansion of the Mandibular Arch in Children during the Mixed Dentition Period - A Clinical Study
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Expansion of the Mandibular Arch in Children during the Mixed Dentition Period - A Clinical Study

机译：混合牙列期儿童下颌弓扩张的临床研究

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A review of the dental literature revealed relatively few studies on the expansion of the mandibular dental arch. The present study attempted expansion of the mandibular arch using a Bihelix appliance. The subjects were 16 children, exhibiting crowding, age ranges from 7 to 1 1 years. The mandible was expanded 2.0 mm every 3 months. Significant expansion, not only of the individual tooth inter-arch dimensions but also of the overall arch length, was obtained during the period of incisor tooth replacement. The mode of expansion was classified as follows: Type I, those, which showed no effect on the apical base; Type II, those which showed no consistency of the measurement lines. In this study, 6 of 16 cases were classified as type I and 10 cases as type II. Expansion was continued over a period of 15 to 3 years. We concluded that considerable lateral expansion of the mandibular arch is possible using the Bihelix appliance. It is suggested that this might contribute greatly to non-extraction orthodontic treatment. Further studies are recommended.
机译：牙科文献的回顾显示，有关下颌牙弓扩张的研究相对较少。本研究尝试使用Bihelix矫治器扩展下颌弓。受试者为16名儿童，表现为拥挤，年龄范围为7至1 1岁。下颌骨每3个月扩大2.0毫米。在切牙更换期间，不仅单个牙弓之间的尺寸显着扩大，而且整个弓长度也得到了显着扩展。扩张方式分为：I型，对根尖无影响; II型，显示测量线不一致性的那些。在这项研究中，16例中有6例被归为I型，10例被归为II型。扩展持续了15到3年。我们得出的结论是，使用Bihelix矫治器可实现下颌弓的明显横向扩展。建议这可能对非拔牙正畸治疗有很大贡献。建议进一步研究。

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