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The TMC joint is a synovial joint between the trapezium bone of the wrist and the metacarpal bone at the base of the thumb. This joint is a so-called saddle joint (articulatio sellaris), unlike the CMC joints of the other four fingers which are ellipsoid joints. [17] This means that the surfaces of the TMC joint are both concave and convex.
The carpometacarpal (CMC) joints are five joints in the wrist that articulate the distal row of carpal bones and the proximal bases of the five metacarpal bones.. The CMC joint of the thumb or the first CMC joint, also known as the trapeziometacarpal (TMC) joint, differs significantly from the other four CMC joints and is therefore described separately.
Osteoarthritis commonly affects three main sites in the hand: the base of the thumb, where the thumb and wrist converge, known as the carpometacarpal (CMC) joint; the joint closest to the fingertip, referring to the distal interphalangeal joint (DIP); the middle joint of a finger, referring to the proximal interphalangeal joint (PIP). [5]
Symptoms of Bennett fracture are instability of the CMC joint of the thumb, accompanied by pain and weakness of the pinch grasp. Characteristic signs include pain, swelling, and ecchymosis around the base of the thumb and thenar eminence, and especially over the CMC joint of the thumb. Physical examination demonstrates instability of the CMC ...
[1] [3] Joint replacement surgery may be an option if there is ongoing disability despite other treatments. [2] An artificial joint typically lasts 10 to 15 years. [11] Osteoarthritis is the most common form of arthritis, affecting about 237 million people or 3.3% of the world's population, as of 2015. [4] [12] It becomes more common as people ...
[7] [8] Other signs and symptoms, as with any joint affected by osteoarthritis, include: Loss of motion stiffness, which can be worse after a period of rest, such as when one awakes in the morning. Deformity of the wrist. There is a characteristic dorsal radial fullness related to osteophytes and joint effusion.
In the lower groups according to the International Classification (IC groups 0–1) this can be done onyby means of tenodesis. In IC groups 2 and higher the m. brachioradialis is used to strengthen the thumb flexor. [30] Usually the thumb extensor is fixed to the extensor retinaculum and the carpometacarpal joint is fused in the right position. [3]
Joint replacement of the hand is a procedure that was invented by the Scottish scientist, Mitchell McGuire. The procedure was considered a major breakthrough in the medical field at the time. However, it is now considered an almost standard operation. The first successful surgery of this kind was conducted on 21 December 1992, in New York City, US.