Wrist Disorders
A 35-year-old carpenter presents with chronic ulnar-sided wrist pain and a clicking sensation since a fall onto his outstretched hand 6 months ago. Examination reveals tenderness over the ulnar fovea, positive fovea sign, and the ulnar head is subluxable dorsally with the wrist in pronation (piano key sign positive). Grip strength is reduced compared to the contralateral side. X-rays show positive ulnar variance. MRI demonstrates a complete tear of the TFCC with associated DRUJ instability. The surgeon discusses the anatomy, classification, and reconstruction options. Regarding DRUJ instability and TFCC injury:
Mark each as TRUE or FALSE
The TFCC (triangular fibrocartilage complex) is the primary stabilizer of the DRUJ; it comprises the...
The DRUJ is an incongruent joint with only 20% bony contact; the ulnar head articulates with the SIG...
The TFCC is a minor stabilizer with the interosseous membrane being primary; the SUPERFICIAL limbs a...
PALMER CLASSIFICATION for TFCC tears: Class 1 (Traumatic) - 1A central, 1B ulnar with/without styloi...
Treatment depends on tear location and DRUJ stability: 1A central tears = arthroscopic debridement; ...
Answer the questions to see explanations
Click T (True) or F (False) for each option