User LoginAdmin LoginSubscribe
JBJS Clinical Classroom Logo

The JBJS Quiz of the Month is a collection of 10 relevant questions from each orthopaedic subspecialty. The questions are drawn from JBJS Clinical Classroom, which houses over 4,500 questions and 3,100 learning resources. Take the Quiz to see how you score against your peers!

NOTE: This quiz does not earn users CME credits. The questions must be answered within Clinical Classroom to earn CME credits.

A 27-year-old female patient suffered a fall earlier in the day and presents with right index finger deformity and pain. Radiographs show a simple volar proximal interphalangeal (PIP) dislocation. Closed reduction is performed under digital block anaesthesia, and post-reduction imaging shows concentric reduction. Treatment involving PIP extension splinting for 6 weeks is ordered to facilitate healing of which of the following structures?
    • Central slip
      • Simple volar dislocations of the PIP joint are concerning for a central slip rupture. PIP immobilization in extension for 6 weeks is appropriate to allow the central slip to heal without a gap.

 

  • Lateral bands

Simple volar dislocations of the PIP joint are concerning for injury to the central slip, not the lateral bands.

 

 

  • Collateral ligaments

Simple volar dislocations of the PIP joint are concerning for a central slip, not collateral ligament injury. Extension of the PIP joint tensions the accessory collateral ligaments.

 

 

  • Volar plate

Simple volar dislocations of the PIP joint are concerning for central slip, not volar plate injury. Extension of the PIP joint tensions the volar plate.

 

 

 

Menu