Patent ID: 6726475
Filing Date: 2004-04-27
Classification: A61C

Abstract:
A screw device for orthodontic treatment to be used with a spring comprising:a) a screw-body part having a diameter with external threads extending along a length; b) a platform part axially aligned with the screw-body part, the platform part having: i) a flat bottom plane adjacent to one end of the screw-body part and perpendicular to the screw-body part, such that when the screw-body part is screwed into an object the bottom plane will contact a surface of the object; ii) a flat top plane perpendicular to the screw-body part; and iii) an outer periphery having a platform part width in a radial direction; and c) a head part having at least one slot and a neck, the at least one slot extending laterally across the head part and sized to accept an orthodontic archwire, the neck being a uniform width and axially aligned with the screw-body part and extending outwardly from the top plane of the platform part at a first end thereof, the head part having a width larger than the uniform width of the neck, such that one end of the spring is removably hooked on the neck and a thickness of the platform part determines a distance between the spring and the bottom plane of the platform part; wherein the platform part width is larger than the width of the head part, and the platform part width is larger than the diameter of the screw-body part.