What is the primary purpose of the Grind Test?

The Grind Test is primarily used to assess degenerative joint disease, specifically in the carpometacarpal (CMC) joint of the thumb. During the test, the clinician applies axial load to the thumb while rotating it, which can elicit pain or discomfort if there is degeneration present. The CMC joint is particularly susceptible to osteoarthritis, especially in individuals who engage in repetitive grasping or pinching motions.

By evaluating the response during this test, clinicians can gain insights into the presence of joint degradation, informing subsequent treatment or management strategies. The focus on the CMC joint distinguishes this test within the broader context of hand and wrist assessments, highlighting its specific utility in identifying related pathologies.