Process and apparatus for producing fabricated parts in dentistry

Apparatus for producing inlays, onlays and crowns in dentistry, comprising:

• a support fork (2) being rotatably journaled on a guide body (12) that also moves slidably and pivotally on a guide rod (12) supported on a foundation body (7), the support folk (2) having a copying spindle (16) for mounting a feeler body (18) and a motor driven machining tool (22) that are firmly connected by a connecting tube (21) to move together;
• and
• a rocker (3) also being rotatably journaled about a swivel axis (23) extending substantially parallel to a copying spindle (16) and supported on the foundation body (7), the rocker (3) having a pattern (24) with an impression of a plastic defect replacement of the inlay, onlay or crown to be produced, and having a fabricated part (25) from which the inlay, onlay or crown is machined, the pattern (24) and the fabricated part (25) rotatably mounted respectively about rotation axes (26, 27) and mechanically and synchronously movably interconnected to perform identical rotary movements so that the entire outer surfaces of the pattern (24) and the fabricated part (25) revolve respectively about 360 degrees, the swivel axis (23) being at a right angle to the rotation axes (26, 27) of the pattern (24) and the fabricated part (25) and intersecting the same;
• whereby during copying of pattern (24) the feeler (18) senses the impression of the pattern (24) of the plastic defect replacement and due to the identical movement of the feeler (17) and a toolholder (20), displacement or deflection of a feeler pin (18) produces the same displacement or deflection of the machining tool (22).

Apparatus for producing inlays, onlays and crowns in dentistry, comprising:

• an outer circular ring disk (75) being mounted in a casing (73) and slidably rotatable therein, and having a connecting tube (21) projecting through it for mounting a feeler (17) with a feeler body (18) and a toolholder (20) that are firmly connected to move together;
• and
• a rocker (3) being mounted in a center circular disk (76) which is concentrically arranged within the outer circular ring disk (75) for moving slidably rotatable with respect to one another, and having a pattern (24) with an impression of a plastic defect replacement of the inlay, onlay or crown to be produced, and having a fabricated part (25) from which the inlay, onlay or crown is machined, the pattern (24) and the fabricated part (25) rotatably mounted respectively about rotation axes (26, 27) and mechanically and synchronously movable interconnected to perform identical rotary movements so that the entire outer surfaces of the pattern (24) and the fabricated part (25) revolve respectively about 360 degrees, around a swivel axis (23) being at a right angle to the rotation axes (26, 27) of the pattern (24) and the fabricated part (25) and intersecting the same;
• whereby during copying of pattern (24) the feeler (18) senses the impression of the pattern (24) of the plastic defect replacement and due to the identical movement of the feeler (17) and the toolholder (20), displacement or deflection of the feeler pin (18) produces the same displacement or deflection of the machining tool (22).