Abstract: The invention described facilitates accurate placement of orthodontic brackets on a patient's mal-occluded teeth. An indexed dental cast of the patient's mal-occlusion is produced by the present apparatus. In process steps for indexing the crown model, various adjustment devices hold a selected mal-occluded crown model of the cast in an "ideal" or corrected position in space. The cast is thus positioned and held while a drill is used to form index holes in the cast material. The index holes record the "ideal" position of the selected crown model even though the crown model remains in its original mal-occluded position in the cast. Positioning of a bracket against the selected crown model is accomplished by a bracket holder and adapter using the index. The holder receives the bracket while the adapter is positioned, using probes inserted into the index holes. The holder may be moved to a selected tip angle and bracket placement height through adjustments on the adapter.

Abstract: The invention described facilitates accurate placement of orthodontic brackets on a patient's mal-occluded teeth. An indexed dental cast of the patient's mal-occlusion is produced by the present apparatus. In process steps for indexing the crown model, various adjustment devices hold a selected mal-occluded crown model of the cast in an "ideal" or corrected position in space. The cast is thus positioned and held while a drill is used to form index holes in the cast material. The index holes record the "ideal" position of the selected crown model even though the crown model remains in its original mal-occluded position in the cast. Positioning of a bracket against the selected crown model is accomplished by a bracket holder and adapter using the index. The holder receives the bracket while the adapter is positioned, using probes inserted into the index holes. The holder may be moved to a selected tip angle and bracket placement height through adjustments on the adapter.

Abstract: The present invention is provided to render quality orthodontic treatment, with proper dispersion of the patient's teeth roots in the supporting medium. The present system involves procedure which establishes and records the location of the patient's individual tooth roots to the visual crowns of the associated teeth. This is accomplished by use of simulated root structures that are attachable to individual crown models of the patient's teeth and oriented in relation to the models such that the axes of the associated roots are made accessible. The individual simulated root structures may be attached to crown models taken from a direct impression from the patient's mouth. The individual crown models are aligned in a surveyor mechanism and attached with their long axes in coaxial alignment with the central axes of dop rods. The dop rods are then held on a grinding rack and moved toward a flat grinding surface which produces a plane flat surface on each crown model.