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临床上使用额兜矫治下颌前突已有一百多年的历史。然而,在其治疗作用方面却存在争议。以前的大部分研究资料主要是横向或有限的纵向研究。有的研究取得了一定的成功,另一些研究表明,经过颏兜治疗后,下颌生长受到明显的抑制。日本的大量研究表明,支持“颏兜对下颌的生长具有一种矫形作用”的论点。这些研究显示出口外力作用在额部可以改善下颌平面角、SNB角、使髁突颈变弯,和减缓下颌生长。
Clinic forehead with correction of jaw protrusion has more than a hundred years of history. However, there is controversy regarding its therapeutic effect. Most of the previous research data were mainly horizontal or limited longitudinal studies. Some studies have achieved some success, while others show that after chinchu treatment, mandibular growth was significantly inhibited. Numerous studies in Japan have shown support for the argument that chinchips have an orthopedic effect on mandibular growth. These studies show that the effect of extrinsic force on the frontal portion can improve the mandibular plane angle, the SNB angle, bend the condylar neck, and slow the growth of the mandible.