2021年5月14日 · Digital Collateral Ligament Injuries result from direct trauma to the digit injuring the radial or ulnar collateral ligaments. Diagnosis is made clinically and MRI may be required for confirmation. Treatment is nonoperative with buddy splinting with the exception of radial collateral injury to the index finger which requires surgical repair.

The ulnar collateral ligament (blue arrows) demonstrates proximal edema but is intact. On the 3rd image, attenuated midsubstance radial collateral ligament (RCL) fibers are present (red arrowhead). A fluid filled gap is present at the normal distal insertion site of the RCL on the final provided slice (red arrowhead).

2021年5月23日 · radial collateral ligaments (RCL) are more horizontal than ulnar collateral ligaments (UCL)

Biomechanically, the radial collateral ligament is most important for providing thumb metacarpophalangeal joint stability in flexion and extension, specifically for strong pinch and during actions such as the pushing of a button of touch-screen [1].

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.

radial collateral ligament ruptures of the index finger. When ligament repair is necessary, the surgeon should be aware of 3 guiding principles: minimize any soft-tissue dissection. It is wise to use magnifying loupes throughout the procedure. 3. Approach. For this procedure a midaxial approach to the PIP joint is normally used. 4. Closed reduction

2007年12月17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.

2006年1月28日 · Anatomically, the thumb UCL and index finger RCL are the primary stabilizers during pinch. The secondary stabilizers of both are the accessory collateral ligament, dorsal capsule, and volar plate.

2017年5月9日 · When the RCL of the thumb MCP joint is completely ruptured, the proximal phalanx will subluxate volarly and ulnarly relative to the metacarpal head, pivoting on the ulnar situated adductor aponeurosis.

A complete RCL tear with an intact UCL will result in thumb pronation instability as the proximal phalanx rotates around the thumb meta-carpal around the axis of the UCL. Stener lesions occur mostly on the ulnar side of the MCP joint of the thumb (Fig. 5), although they can occur on the radial side and even in a nger but those fi are much less ...