Abstract: A dental articulator (1) having an upper tray (2) and a lower tray (3) connected together with an articulator arm (7) having an upper arm (27) and a lower arm (28) wherein an upper access cover (4) is removably secured to the upper tray (2) and a lower access cover (5) is removably secured to the lower tray (3). Flanges (24, 25, 31) and/or apertures (20 and 21) are provided to removably secure the access covers (4 and 5) to the trays (2 and 3). In this manner, a user may work on casts (8, 9, 29 and 30) without disassembling the articulator (1) and removing the casts (8, 9, 29 and 30). An alternate embodiment includes triangular trays (2 and 3) having at least one cast holder (35) extending from each tray (2 and 3).

Abstract: A coordinative dental-die-interlocking system includes a dental-die pin (1) anchored in a tooth-die base (4) and inserted removably in a die-pin sleeve (2) that is anchored in a dental-model base (6). The dental-die pin includes a pin that lock-fits in the die-pin sleeve. The dental-die pin and the die-pin sleeve include predeterminedly color-coded identification marking. A plurality of sizes of die pairs (11, 12, 13) which are color-coded mate rigidly in a system of coordinative interlocking to prevent mismatching errors and to save time matching dental-die pins and die-pin sleeves by dental artisans.

Abstract: A pin stabilizer fir dental models (14) has a plurality of positioning pins (1) extended from an articulator base plate (2) for insertion into positioning sleeves (3) that are cast in a dental model while the positioning pins are in the positioning sleeves. Quickly and easily then, the dental model can be attached repeatedly to and detached repeatedly from a dental articulator (15) to which the articulator base plate is affixed for work on a dental model. The positioning pins and the positioning sleeves can be made of materials which do not deform from repeated use. A plurality of dental models can be constructed to fit onto an articulator base plate that is attachable to a bottom and/or top articulator jaw (16) of known types and sizes of dental articulators.