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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.
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.
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.
[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 ...
Joint replacement is a procedure of orthopedic surgery known also as arthroplasty, in which an arthritic or dysfunctional joint surface is replaced with an orthopedic prosthesis. Joint replacement is considered as a treatment when severe joint pain or dysfunction is not alleviated by less-invasive therapies.
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The first metacarpal bone is short and thick with a shaft thicker and broader than those of the other metacarpal bones. Its narrow shaft connects its widened base and rounded head; the former consisting of a thick cortical bone surrounding the open medullary canal; the latter two consisting of cancellous bone surrounded by a thin cortical shell.
Twin brothers who were born conjoined, sharing part of their sternum, diaphragm, abdominal wall and liver, recently celebrated their first birthday after undergoing successful separation surgery.