Maxillary Skeletal Expander having movable screw guide

TLDR: In this paper, a maxillary skeletal expander with a transformable screw guide is described, which strongly fixes a screw to a maxilla when the screw is implanted in the maxilla.

Abstract: The present invention relates to a maxillary skeletal expander and, more specifically, to a maxillary skeletal expander with a transformable screw guide, which strongly fixes a screw to a maxilla when the screw is implanted in the maxilla. According to the present invention, the maxillary skeletal expander with a transformable screw guide comprises: a pair of first and second expanding parts coupled to a tooth fixing means fixed to a tooth to correct the tooth; an expanding screw screw-coupled to the first and second expanding parts to adjust a gap between the first and second expanding parts while being rotated; a pair of guide rods guiding the movement of the first and second expanding parts when the first and second expanding parts are rotated by rotation of the expanding screw; a plurality of arms inserting and fixing one end into and to the first or second expanding part, and coupling the other end to the tooth fixing means; a vertical through-hole formed in the first and second expanding parts in the direction perpendicular to a moving direction of the first and second expanding parts; and a screw guide disposed in the vertical through-hole to be guided to the vertical through-hole and vertically moved.