Wire ring holder.

Wire ring holder. Apply to the first primary molars as early as the loss or the first molar has erupted, the second primary molars as early as missing. Dai-wire ring will maintain primary second molar or the first molar in the past not to tilt. Functional activities holder. It's equivalent to partial Denture, tooth loss not only to maintain the nearly far in length, but also to maintain a high degree of vertical and the restoration of Chewing function, to change the children with facial appearance, in particular, missing front teeth of the upper lip depression. Quay due to resume the voice dysfunction, improve and overcome the bad oral habits. Bow-Lingual maintained. Use of the two most remote teeth, welding around the arch of the tongue side of arch wire, and maintain arch perimeter unchanged. Gap expansion device. A Widening gap in order to facilitate the normal eruption of permanent teeth.