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MRI spectrum of injuries to the thumb metacarpophalangeal joint ulnar collateral ligament with a proposed expanded classification of injuries in American football players

Journal

SKELETAL RADIOLOGY
Volume -, Issue -, Pages -

Publisher

SPRINGER
DOI: 10.1007/s00256-023-04539-6

Keywords

Thumb; Ulnar collateral ligament; Football; MRI

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Injuries to the ulnar collateral ligament of the thumb metacarpophalangeal joint are of interest for both athletes and non-athletes. This article reviews the magnetic resonance imaging categorization of these injuries and proposes two additional injury patterns seen in high-level and professional athletes who play American football. Additionally, a novel surgical technique called internal brace augmentation is introduced, which provides protection and speeds up the recovery process.
Injuries to the ulnar collateral ligament of the thumb metacarpophalangeal joint are of both historic and modern interest for athletes and non-athletes alike. The thumb metacarpophalangeal joint requires stability in both flexion and extension utilizing a combination of static and dynamic stabilizers. This article reviews the magnetic resonance imaging categorization of thumb ulnar collateral ligament injuries and proposes two additional injury patterns seen in high-level and professional athletes who play American football. In addition to the direct magnetic resonance imaging findings in collateral ligament tears, secondary findings of rotation and subluxation can be seen at the thumb metacarpophalangeal joint due to the altered physiologic forces on the joint. Internal brace augmentation via suture tape of a traditional ulnar collateral ligament repair is a novel surgical technique that provides protection during initial healing and the ensuing remodeling phase following repair or reconstruction, resulting in a faster return to play.

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