Abstract: An improved dental full arch and impression checkbite frame which includes an outer lingual arch and an inner labial arch which are each provided with a longitudinally extending slot for receiving and supporting therein a porous membrane which is adapted to form the support for the mass of impression material for making an impression, the respective slots defining an upper frame portion and a lower frame portion. The respective inner and outer arches are rigidly interconnected at their corresponding distal ends by a cross link. At the proximal end of the dental frame, there is provided a handle having offset bifurcated portions, whereby the bifurcated portions are respectively connected to the upper frame section and lower frame section. A rigid frame is thus defined that is free of any appreciable movement that can compromise the accuracy of a model or cast made thereby.

Abstract: A dental implement is disclosed which consists of a lip and cheek depressor or retractor adapted for mounting on the shank of a dental instrument adjacent the work portion of the instrument, such as a mirrored surface. The retractor is mounted for rotation about the longitudinal axis of the shank and may be detachably affixed thereto to facilitate interchangeability of retractors of various sizes and shapes.