2024年1月12日 · Thumb Collateral Ligament Injuries, most commonly ulnar collateral (UCL), are athletic injuries that lead to a decrease in effective thumb pinch and grasp. Diagnosis relies upon thumb MCP radial-ulnar stress exam and MRI studies.

Injuries to the collateral ligaments of the thumb metacarpophalangeal (MP) joint, which range from mild sprains to complete ruptures, are among the most common injuries of the hand. The majority of these injuries involve the ulnar collateral ligament (UCL), while radial collateral ligament (RCL) injuries occur far less frequently.

The ulnar collateral ligament (UCL) and radial collateral ligament (RCL) are the primary static stabilizers of the MCP with additional stability provided by articular surface congruity, the dorsal capsule, and the volar plate.

2008年5月1日 · Radial collateral ligament (RCL) injuries of the thumb are relatively common although they are less common than ulnar collateral ligament injuries, which make up 10% to 42% of collateral ligament injuries of the thumb. The RCL is especially important for pinch movements and for movements of depression.

The Metacarpophalangeal (MCP) joint of the thumb are stabilize by two major ligaments. The ulnar collateral ligament (UCL) and the Radial collateral ligament (RCL) . The UCL is more commonly injured, usually from forced radial deviation (abduction) of the thumb, while the RCL are rarely injuried.

Radial collateral ligament injuries were more likely than UCL injuries to have resulted from an axial load (56% vs 16%), whereas UCL injuries were more likely to have been caused by an abduction-adduction moment (50% vs 22%).

The Radial Collateral Ligament (RCL) is similar to the UCL, but is on the opposite side of the UCL (on the outside part of the thumb). Most of what is described below pertains to both the UCL and the RCL. Injury to the ligament occurs when there is a sudden force on the thumb, such as falling or having the thumb pulled away.

UCL Stress Test: Stabilise the 1st metacarpal and radially deviate the MPJ. Assess unaffected side as well. Avulsion: the bony fragment can be seen on x-ray. Therefore able to assess as to whether the fracture will heal in its current position. ULQ specialists are available to see patients and assess the above.

RCL and UCL injuries utilize the same three stage classification system as follows {1-4}: Grade 2: Incomplete tear of the RCL with a greater number of torn fibers present – increased tenderness to palpation at the radial aspect of the MCP, more prominent swelling and the presence of laxity on stressing but with a definitive end point.

Complete ulnar collateral ligament tears with ligament retraction are best treated with acute repair. Ulnar collateral ligaments are most commonly avulsed from the base of the proximal phalanx, whereas radial collateral ligament injuries may be injured proximally, distally, or intrasubstance.