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期刊论文
Effect of thevertical force component of Class He lastics on the anterior intrusive force of maxillary archwire
European Journal of Orthodontics l4(l992)280-284，-0001，（）：
Class Helastics are usually employed in the treatment of excessive overbite and overjet with the Beg gtechnique. The effect of Class He last II elastics on bite opening and the extent of such an effect is Uncertain. This article, based on measurements of 3O cases, illust rates that the effect of the vertical component of force from Class He lastics in reducing the intrusive force generated by the a nchor bands in the upper archwire is less than previously be|iew d
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