What is scaphoid trapezium?
Scaphoid-trapezium-trapezoid (STT) joint arthritis is a common condition consisting of pain on the radial side of the wrist and base of the thumb, swelling, and tenderness over the STT joint. Common symptoms are loss of grip strength and thumb function.
What type of bone is the trapezium?
carpal bone
The trapezium is an irregular-shaped carpal bone found within the hand. The trapezium is found within the distal row of carpal bones, and is directly adjacent to the metacarpal bone of the thumb. On its ulnar surface are found the trapezoid and scaphoid bones.
What is the function of the trapezoid bone?
The trapezium bone along with the base of the thumb joint forms what is called a carpometacarpal joint, also known as a CMC joint. Due to the location of the trapezium below the thumb joint, the trapezium plays a role in both the stability and the movement of the thumb.
Is a trapezium fracture painful?
Trapezium fractures are rare. They account for ~3–5% of all carpal fractures [1, 2]. The carpometacarpal joint of the thumb plays a pivotal role in the function of the hand. An injury in this region causes pain and swelling at the base of the thumb, affecting prehension, opposition, circumduction and pinch strength.
What attaches trapezium?
It is the most lateral (radial) bone of the distal row, located between the scaphoid and the first metacarpal bone. It articulates with the scaphoid proximally, the trapezoid medially, and the thumb and index metacarpals distally.
What inserts on trapezium?
The tubercle of trapezium is a tubercle found on the anterior surface of the bone. It is where sometimes abductor pollicis brevis muscle attaches.
How do you break the trapezoid bone?
Trapezium fractures account for 3% to 5% of all carpal fractures. Fractures of this bone occur most commonly with a fall on a hyperextended and radially deviated wrist with the thumb in abduction. Clinically, there is point tenderness at the base of the thumb.
What does a broken trapezoid feel like?
Patients with trapezoid fractures may complain of point tenderness at the base of the second metacarpal, pain with range of motion at the second metacarpophalangeal joint, or pain and tenderness at the anatomic snuffbox. Patients may or may not have dorsal wrist swelling and decreased range of motion at the wrist.