METHOD FOR CASTING GNATHOSTATIC MODELS OF DENTAL ARCHES AND INSTRUMENTAL SYSTEM FOR CARRYING OUT SAID METHOD

摘要

Phaster cast socles which support dental arch models (upper and lower) do not normally bear any specific information with regard to the spatial relations existing between the arches themselves and the skull, particularly as far as the occlusion plane and the centering of arches are concerned. The method and equipment here described are meant to produce socles for dental arch models such that centering of such models and their correct occlusion plane are accurately maintained for each individual patient in a standardized casting device and socle. The equipment incorporates a caster (2) with two moulding bases (75, 76) a facebow (1) equipped with an inclinometer (15) which is used to identify and orientate reference plane (a), a bite fork (3) equipped with another inclinometer (37) used to measure the angle of the patient's upper dental arch vis-à-vis reference plane (a), an orientator-truer assembly (4) for the upper model (M) which is equipped with two hinges (45) and (46) with axes (a) and (b) crossing at right angles to each other and is used to support, orientate and true the bite fork (3) together with the model (M) of the upper dental arch attached to it vis-à-vis an upper moulding base (75) of a caster (2) while pouring the cast concerned.