Abstract
The proximal interphalangeal joint is a commonly injured joint in the hand. Fracture-dislocations can be devastating injuries if missed or improperly treated1,2. This joint is more susceptible to injury because of its long lever arm and the high congruity of the articular surfaces1,3. It has a large arc of motion, around 120°. Stiffness and pain are common sequelae and can occur in spite of diligent treatment. Because of the asymmetry of the proximal phalangeal condyles, there is slight supination as the proximal interphalangeal joint flexes4. The joint is stabilized by the osseous architecture as well as the volar plate and collateral ligaments. The volar plate attaches to the proximal phalanx through the check ligaments and distally to the base of the middle phalanx. It is thinner centrally and blends with the collateral ligaments laterally5. It functions to prevent hyperextension and glides proximally with joint flexion5. Coronal plane stability is provided by the accessory and proper collateral ligaments6. The proximal interphalangeal joint most commonly dislocates dorsally and the volar side of the middle phalanx is usually fractured. The volar plate can avulse with varying amounts of bone from the volar lip. These are usually not comminuted fractures compared with an injury that involves an axial load with the joint in flexion7,8. …
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
