Abstract: A detachable fastener for joining impressions of a mouth formed of a lower mouth model and upper mouth model, each of which may include impressions of teeth, onto an articulator formed of a base member or bottom bow adapted to support the lower mouth model and a top member or top bow adapted to support the upper mouth model and wherein each of the base and top members has a layer of cured binding material formed thereon adjacent the respective mouth model and the detachable fastener comprises a first connecting means having an annular shaped connecting collar of a predetermined length and diameter which has extending axially from one side a spherical shaped joining member and extending axially from the other side an enlarged base member, and a second connecting means having a socket housing formed of an elongated, thin walled tubular member having an opening at one end thereof which extends into and through the interior of the socket housing wherein the opening is adapted to receive and pass the spherical sha

Abstract: A dental articulator has a generally horizontal base, one end of which acts as the lower bow. Projecting upwardly from this base is a stem. Mounted on the top of the stem by a slip-on construction is a removable hinge support. The hinge support has a pair of spaced vertical flanges, each of which has an elongated slot inclined to the horizontal at an angle approximating the angle between the jaws that the human condyles make upon forward and rearward motion. An upper bow is hinged to the flanges by a hinge pin passing through the elongated slots. Elastic bands engage both ends of the pin and the hinge support to normally keep the pin in the lower end of each slot. The bands are resilient enough to allow the operator to pull the upper bow backwardly along the condyle angle to check the teeth for forward and backward clearances and also to allow the operator to twist the upper bow with respect to the lower bow to check for clearances upon lateral movement of the teeth.