2. AN ATTACHMENT TO REPLACE THE BASE OF A DENTAL ARTICULATOR IN WHICH A FRAME FOR HOLDING THE MOUNTING FOR THE UPPER DENTURE CARRIES A POST TO WHICH IS SECURED AN INCISOR GUIDE PIN AND IS SUPPORTED BY ADJUSTABLE PIVOTS ON A PAIR OF RIGHTS FOR SLIDABLE AND ANGULAR MOVEMENTS SIMULATING THE RELATIVE MOVEMENTS OF THE HUMAN JAW, SAID ATTACHMENT COMPRISING A BASE PLATE HAVING LEGS DETACHABLY FASTENED TO ITS UNDER SIDE FOR SUPPORTING THE ARTICULARTOR ON A SURFACE AND HAVING MEANS AT ONE SIDE FOR DETACHABLY FASTENING AND SUPPORTING SAID UPRIGHTS ON ITS SURFACE AND FORMED WITH A CYLINDRICAL WALL INTEGRAL WITH AND EXTENDING UPWRDLY FROM SAID BASE PLATE AND OPENING ON ITS LOWER SIDE, SAID CYLINDRICAL WALL BEING INTERNALLY THREADED AND HAVING A PLANE, TRANSVERSE WALL PARALLEL TO SAID BASE PLATE ACROSS ITS UPPER END VERTICALLY SPACED ABOVE SAID BASE PLATE AND WITH AN APERTURE IN SAID TRANSVERSE WALL, A CLAMPING RING THREADED INTO SAID CYLINDRICAL WALL, A CYLINDRICAL MEMBER OF SMALLER DIAMETER THAN IN THE INTERNAL DIAMETER OF SAID CLAMPING RING AND SAID APERTURE EXTENDING THROUGH SAID APERTURE AND RING AND PROVIDED WITH A RADIAL FLANGE BELOW ITS UPPER END OF GREATER DIAMETER THAN SAID APERTURE AND OF LESS DIAMETER THAN SAID CYLINDRICAL WALL AND CLAMPED BETWEEN SAID TRANSVERSE WALL AND SAID RING, SAID CYLINDRICAL MEMBER AND FLANGE HAVING SUFFICIENT CLEARANCE IN SAID APERTURE, SAID CYLINDRICAL WALL AND SAID RING THAT IT MAY BE MOVED LATERALLY IN ANY DIRECTION AND CLAMPED IN POSITION BY SAID RING WITH SAID FLANGE PARALLEL TO SAID BASE PLATE, SAID CYLINDRICAL MEMBER HAVING A POLYGONAL, VERTICAL APERTURE THERETHROUGH PERPENDICULAR TO SAID TRANSVERSE WALL AND SAID RADIAL FLANGE, AND A SET SCREW EXTENDING THROUGH THE SIDE OF SAID CYLINDRICAL MEMBER TO INTERSECT SAID APERTURE IN SAID CYLINDRICAL MEMBER, AND A MOUNTING PLATE FOR THE LOWER DENTURE FORMED WITH AN INTEGRAL, VERTICALLY EXTENDING POLYGONAL POST SLIDABLY AND NONROTATABLY FITTING IN SAID APERTURE IN SAID CYLINDRICAL MEMBER AND HELD IN VERTICALLY ADJUSTED POSITION BY SAID SET SCREW, SAID POST AND FLANGE MAINTAINING SAID MOUNTING PLATE PARALLEL TO SAID BASE PLATE WITH SAID FLANGE ABOVE SAID BASE PLATE TO PROVIDE CLEARANCE FOR SAID CYLINDRICAL MEMBER AND POST ABOVE THE SURFACE SUPPORTING THE ARTICULATOR, AND MEANS ON THE SIDE OF SAID BASE PLATE OPPOSITE SAID ONE SIDE FOR DETACHABLY FASTENING A GUIDE FOR ENGAGEMENT BY SAID INCISOR GUIDE PIN SECURED TO SAID FRAME FOR HOLDING THE MOUNTING FOR THE UPPER DENTURE.