Abstract: A device for facilitating the positioning and mounting of rear teeth on dentures, comprises a small, elongate plate which bears on respective faces the impressions of the occlusal parts of the upper and lower rear teeth respectively, and is provided on one side with a pair of parallel cantilever arms. The impressions are provided with holes in correspondence with the cusps of the upper and lower teeth to ensure the correct positioning of the teeth on the respective dentures, while the arms locate the plate correctly relative to a predetermined occlusal plane of the teeth.