$base of 1st metacarpal fracture$

$base of 1st metacarpal fracture$

Treatment may include exercise, anti-inflammatory medication, and surgery. Characteristic symptoms include pain and swelling around the base of the thumb, gradually radiating to the wrist, causing difficulty in any twisting movement like rotating a doorknob. As a result, it is the most common CMC joint, as well as thumb joint, to get arthritis. Thumb Carpometacarpal Arthritis: Since over half of all functions of the hand involve the thumb, the first CMC joint is subjected to a lot of stress and pressure every day. Common Injuries and Associated Conditions Additionally, it is also partially the spot of origin for the flexor pollicis brevis, which primarily originates from the trapezium. There are three muscles attaching to the first metacarpal, namely, the abductor pollicis longus, opponens pollicis, and the first dorsal interosseous. As a result, the metacarpal of the thumb makes almost a right angle to the metacarpals of the other digits, allowing it to rotate and move in nearly all directions. It is a type of synovial joint where the trapezium forms a concave or saddle-shaped articular facet for the base of the first metacarpal so the latter can sit into the space like a rider on horseback. The articulation between the first metacarpal and trapezium forms a saddle joint.

$base of 1st metacarpal fracture$

The CMC joint of the thumb is of fundamental importance in structuring the hand in humans and other primates, allowing the use of the thumb to hold objects. Ĭarpometacarpal Joint (CMC Joint) of the Thumb On its head, it articulates with the proximal phalanx of the thumb to form the first metacarpophalangeal joint, while the base of the first metacarpal articulates with the carpal bone trapezium to form the carpometacarpal joint of the thumb or the trapeziometacarpal joint (TMJ). Anatomy of the Metacarpal of Thumb Surfaces and Joints Its base begins to ossify when the child is about 3 years old. The ossification centers for the shafts for all metacarpals start appearing around the 8th or 9th week of fetal growth, with that of the first metacarpal appearing last.

$base of 1st metacarpal fracture$

Base of 1st metacarpal fracture