The Gothic Arch tracing device is primarily used to record the centric relation, which is the most retruded, unstrained position of the mandible relative to the maxilla. This device captures the apex of the Gothic arch tracing, representing the point where the condyles are in their optimal musculoskeletal position. Accurate recording of centric relation is crucial for fabricating well-fitting dentures and achieving proper occlusal relationships. The device helps distinguish centric relation from habitual occlusion by tracing mandibular movements without interference from tooth contact. This makes it an essential tool in prosthodontics for establishing a reproducible and stable jaw position before tooth arrangement.

Reference: Textbook of Prosthodontics, T. S. Mahajan, 2nd Edition.