Hemi-capitate Arthroplasty for Dorsal Fracture-Dislocations of the Proximal Interphalangeal Joint: Surgical Technique and Illustrative Case.

Abstract

Osteochondral graft from the carpal bone allows anatomical joint reconstruction in unstable dorsal fracture-dislocations with > 50% of the articular surfaces. The most used graft is the dorsal hamate. Hemi-hamate arthroplasty is technically challenging and has anatomical incongruity, and many authors have evolved various modifications in the palmar buttress reconstruction of the middle phalanx base. Therefore, there are no universally accepted treatment modalities for these complex articular injuries. This article describes the dorsal capitate as the osteochondral graft for middle phalanx volar articular surface reconstruction. Hemi-capitate arthroplasty was done on a 40-year-old man with an unstable dorsal fracture dislocation of the PIP joint. The osteochondral capitate graft united well, and the joint congruency was good at the final follow-up. The surgical technique, illustrative images, and rehabilitation are discussed. With the evolving technical modifications and complications in Hemi-hamate arthroplasty, distal capitate may be considered a reliable and alternate osteochondral graft for unstable PIP joint fracture-dislocations. The online version contains supplementary material available at 10.1007/s43465-023-00853-2.