Method and apparatus for designing and forming a custom orthodon

Details Method and apparatus for designing and forming a custom orthodon Method and apparatus for designing and forming a custom orthodon

1992-11-09

1995-07-11

O'Connor, Cary E.

Dentistry

Orthodontics

Method of positioning or aligning teeth

A61G 300

Patent

active

054315620

ABSTRACT:
A system and method by which an orthodontic appliance is automatically designed and manufactured from digital lower jaw and tooth shape data of a patient provides for preferably scanning a model of the patient's mouth to produce two or three dimensional images and digitizing contours and selected points. A computer is programmed to construct archforms and calculate finish positions of the teeth, then to design an appliance, preferably including archwires and brackets, to move the teeth to the calculated positions. The lower teeth are positioned at their roots on an arch defined by the lower jaw bone, and the arch is modified to best fit the tooth tips on a smooth curve. Then upper archforms are constructed for the upper teeth. Crown long axes of the teeth are derived and preserved in the treatment which places all lower teeth but the cuspids in a plane and fits the occluding teeth to them. Overlaps for the upper incisors and for cuspid rise are calculated.

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