Abstract: Device for making plaster models, total or partial dental arch replicas, used for dental reconstitutions and mounted on an occlusion device or articulator, comprising two articulated parts, respectively a higher part (1) and a lower part (2), and each having a reception cup (3). Each cup (3) receives a removable cupel of which the peripheral external wall (8) assumes the shape of the internal wall of the cup (3), said cupel (6) being set in the cup (3) when making the model; each cup (3) is comprised of removable fixing means (5, 11, 12) for fixing the cupel (6).