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At any rate, the list of high-level BJJ (and MMA) fighters who have been slowed down by knee injuries goes on and on: Kron Gracie, Xande Ribeiro, David Avellan, Dustin Hazelett, Bas Rutten, Roger Gracie, Tito Ortiz, Romulo Barral, Marco Ruas, Georges Ste-Pierre, to name a few.
CMCJ symptoms. Carpometacarpal joint arthrosis results in pain and swelling at the base of the thumb. Bone spurs can develop which gives the thumb a squared-off appearance. The swelling is associated with laxity and instability of the ligaments that support the thumb, resulting in further wear and tear of the joint.arpometacarpal joint arthrosis is very common and there are many causes. Approximately 50 percent of woman over the age of 50 and approximately 75 percent of all individuals over the age of 65 can develop CMCJ arthrosis. The base of the thumb is subjected to high mechanical sheer and compression forces.