What device uses a motor-driven abrasive disc for shaping dental models?

The device that uses a motor-driven abrasive disc for shaping dental models is known as a model trimer. This tool is specifically designed to refine the shape of dental models by removing excess material and providing smooth, accurate contours. The motorized abrasive disc allows for efficient cutting and trimming, making it easier for dental professionals to achieve the desired dimensions and surfaces necessary for proper fit in dental procedures.

While other tools may serve different purposes in the dental lab, such as grinding or cutting, the model trimer is distinctly recognized for its ability to shape models effectively with fine precision due to the rotation and abrasion of the disc.