A maxillary skeletal expander is proposed. The maxillary skeletal expander is composed of a pair of dental arch expansion bodies positioned to face each other in an oral cavity; an expanding screw provided between the pair of dental arch expansion bodies to move the dental arch expansion bodies; a guide provided between the pair of dental arch expansion bodies to safely move the dental arch expansion bodies without deviation; a dental arch expansion body combining means having a fixing piece for penetrating a fixing hole at a selected part in the oral cavity, and configured to be combined to and separated from each of the dental arch expansion bodies.

Maxillary skeletal expander

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.

Maxillary Skeletal Expander having movable screw guide

The present invention relates to a dental arch extension apparatus and, more specifically, to a dental arch extension apparatus with a loosening prevention function of preventing a screw from being loosened after surgery. According to the present invention, the dental arch extension apparatus comprises: a pair of first and second extension parts; an extension screw having a central part and having a first screw part formed on one side of the central part to be screw-coupled to the first extension part and a second screw part formed on the other side of the central part to be screw-coupled to the second extension part so as to adjust an interval between the first and second extension parts while being rotated; a pair of guide rods guiding movement of the first and second extension parts when the first and second extension parts are moved by rotation of the extension screw; and a loosening prevention member restricting the rotation of the extension screw by the stress within elastic limit.

Lee Yun Seok

Papers

Maxillary Skeletal Expander having movable screw guide

Maxillary Skeletal Expander having loose stopper