Thumb Grind test is a wrist examination procedure that identifies the presence of Trapeziometacarpal arthritis or degenerative joint disease (DJD). The test assesses the integrity of the thumb CMC joint.
The patient should be awake and cooperative during the test.
- Patient should be seated during the procedure.
- The examiner grips and then stabilizes the patient’s wrist and thumb.
- Long axis compression is applied while circumducting the thumb.
- The examiner assess the patient for any signs of pain and for crepitis.
Positive Thumb Grind Test
There is positive Thumb Grind Test when the patient complains of pain as the thumb is compressed and cicumducted. Crepitis could also be a positive Thumb Grind Test. These signs could indicate the presence of trapeziometocarpal arthritis or degenerative joint disease.