Boutonniere Deformity: Pathogenesis and Complications • Hyperextension of DIP • Flexion of PIP => Boutonniere Deformity => Shortening of collateral ligaments and volar plate of PIP joint => Premanent contracture and fibrosis of IPJs => • Permanent deformity • Decr ROM in PIP extension • Osteoarthritis #Boutonniere #Deformity #pathophysiology #msk #rheumatoidarthritis
