Lunotriquetral ligament injury represents a spectrum of pathology ranging from partial ligament tears to complete dissociation between the lunate and triquetrum.
Lunotriquetral ligament injury represents a spectrum of pathology ranging from partial ligament tears to complete dissociation between the lunate and triquetrum. Patients typically present with ulnar-sided wrist pain accompanied by weakness, decreased range of motion, and sometimes a painful clicking sensation. Diagnosis can be difficult because subtle or partial injuries are often occult on routine imaging and may require advanced imaging or clinical testing.
Treatment varies depending on the severity of the injury, chronicity, and the degree of carpal instability. Anatomy of the wrist ligaments, including the lunotriquetral ligament Lunotriquetral ligament injuries most commonly occur from a fall onto a hyperextended wrist, particularly when the wrist is radially deviated, flexed, and pronated. Forced wrist extension places significant biomechanical stress on the ulnar side of the carpus and is the most frequently reported mechanism in clinical series.
These injuries often occur during sports activities, particularly in younger patients. Alternative mechanisms include chronic ligament attenuation associated with ulnar impaction syndrome or injuries occurring as part of perilunate or reverse perilunate trauma patterns. Illustration of lunotriquetral instabilityLunotriquetral ligament injury refers to damage of the lunotriquetral interosseous ligament (LTIL) and includes a range of pathology from mild sprains to partial or complete ligament tears.
These injuries can lead to lunotriquetral instability, characterized by abnormal motion between the lunate and triquetrum. Instability may be dynamic, appearing only during wrist motion or stress, or static, where persistent malalignment is visible on standard radiographs. Severe disruption may result in lunotriquetral dissociation, a separation of the two bones.
LTIL insufficiency can also produce volar intercalated segment instability (VISI), in which the lunate flexes volarly. More broadly, these conditions fall within the spectrum of ulnar-sided carpal instability, involving stabilizing structures on the ulnar side of the wrist. Extra-articular distal radius fracture Lunotriquetral ligament injuries are frequently associated with other wrist pathologies and traumatic injuries.
If you are experiencing symptoms that may be related to lunotriquetral ligament injury, it is important to see a sports medicine physician. Early evaluation and treatment typically lead to better outcomes. Do not ignore pain or symptoms that are limiting your activity.
*This article is for educational purposes only and does not substitute for professional medical advice. Always consult a qualified healthcare provider.*
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