Final answer:
A dental laboratory device that replicates the TMJ movement is an Articulator, which is used to craft dental prostheses while simulating the complex motions of the jaw.
Step-by-step explanation:
A dental laboratory device that replicates the movement of the temporomandibular joint (TMJ) is identified as a Articulator. The TMJ is a complex joint that allows for various movements of the mandible, including opening and closing of the mouth, side-to-side, and protraction/retraction motions. Dental articulators are mechanical devices designed to simulate these movements, aiding in the creation of dental prostheses by allowing the dentist or lab technician to observe the relationship between the upper and lower dental arches.