Contact digitizer, particularly for dental applications

Details Contact digitizer, particularly for dental applications Contact digitizer, particularly for dental applications

A - Human Necessities

61

C

A61C 9/00 (2006.01) A61C 7/14 (2006.01) A61C 13/00 (2006.01) A61C 19/04 (2006.01) A61C 7/00 (2006.01)

Patent

CA 2107367

2107367 9217128 PCTABS00016 A dental surface tracer includes a probe (14) with a tip (194) that can be moved to trace a given dental surface (105), including a mounting device (1, 2) for mounting the tracer to a stable reference location and defining a base plane; a first plurality of links (7, 8, 9) which are substantially coplanar and define a plane of movement; the links being pivotably attached to the mounting device (1, 2) so that the plane of movement makes a variable angle with the base plane; a distal one of the first plurality of links (9) being movable in two dimensions within the plane of movement; circuitry (300) for generating electrical signals representative of movements of the probe tip, as a function exclusively of movements of the first plurality of links (7, 8, 9); a dental handpiece (20) supporting the probe; and a second plurality of links (12, 13) which hold the handpiece and are attached to the first plurality of links (7, 8, 9); the second plurality (12, 13) of links holding the probe tip (194) at all times at a fixed location in the plane of movement with respect to the distal link (9) of the first plurality of links; and permitting the handpiece (20) to move about three axes without moving the probe tip (194) from the fixed location. The entire tracer exclusive of the handpiece is sized to be accomodated within the human mouth.

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