Stener lesions: when the thumb is hyper extended by the ball, the RCL may be torn instead.(Capsular injuries or stener lesions A Stener lesion is a radiographic finding indicating a complete rupture of the UCL with the adductor aponeurosis interposed between the distally avulsed ligament and its insertion into the base of the proximal phalanx.ĭiagnostic Procedures.Ball-handling players often sustain thumb injuries when the ball forcefully abducts the digit, resulting in a UCL tear.Skiers can injure the thumb ligament in accidents involving the ski poles or from a fall.Skiers and those who play ball-handling sports, such as baseball, football and basketball, have a greater risk of sustaining such an injury. Thumb ligament injuries usually occur from a forced radial deviation (abduction) of the thumb during a high-velocity activity. However, in severe type of injuries, both ligaments may be ruptured. The UCL is more commonly injured, usually from forced radial deviation (abduction) of the thumb, while the RCL are rarely injuried.
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The ulnar collateral ligament (UCL) and the Radial collateral ligament (RCL). The Metacarpophalangeal (MCP) joint of the thumb are stabilize by two major ligaments. Mechanism of Injury / Pathological Process The ligamentous anatomy is analogous to that seen in the finger MCP joints, with extrinsic tendons providing additional support
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3 Mechanism of Injury / Pathological Process.