Orthonotes
by the.bonestories
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Cartilage defects cause pain, swelling, mechanical symptoms; poor intrinsic healing. ACI: two-stage procedure — harvest cartilage → culture chondrocyt...
Avulsion of flexor digitorum profundus (FDP) tendon from distal phalanx. Mechanism: forced extension of DIP during active flexion (grabbing opponent’s...
Flexion of PIP joint with hyperextension of DIP joint. Caused by central slip rupture of extensor tendon at PIP. Mechanism: forceful blow, RA, lacerat...
Hyperextension of PIP with flexion of DIP joint. Caused by RA (most common), trauma, chronic mallet finger, spasticity. Clinical: finger looks like sw...
Fibroproliferative disorder of palmar fascia causing fixed flexion deformity of fingers. Risk factors: male, >40 years, northern European descent, dia...
Injury to ulnar collateral ligament (UCL) of thumb MCP joint. Mechanism: valgus stress from fall on abducted thumb (ski pole). Clinical: pain, swellin...
Menisci are fibrocartilaginous structures aiding load transmission, stability, and lubrication. Types: longitudinal, horizontal, radial, flap, bucket...
Most common carpal instability; due to disruption of scapholunate ligament. Clinical: wrist pain, weakness, clicking; positive Watson’s test. Radiolog...
Avascular necrosis of lunate; affects young adults, more in men. Risk factors: negative ulnar variance, trauma, vascular anomalies. Lichtman staging I...
Avulsion of extensor tendon at DIP joint; may involve bony fragment. Mechanism: sudden forced flexion of extended DIP (e.g., ball injury). Clinical: i...