Hemi-hamate arthroplasty offers a unique reconstructive option for dorsal fracture-dislocations of the proximal interphalangeal joint. The distal articular surface of the hamate has a central ridge that is shaped similarly to that of the proximal articular surface of the middle phalanx making it an ideal osteochondral donor site. Hemi-hamate arthroplasty is indicated in both acute and chronic injuries that are not amenable to primary fracture fixation. Use of this osteochondral autograft requires an intact dorsal cortex with dorsal articular surface for fixation. The hamate graft is inset to recreate the volar buttress of the middle phalanx to prevent recurrent dorsal subluxation at the proximal interphalangeal joint. Although the outcomes after hemi-hamate arthroplasty are mostly reported in small case series, the outcomes of hemi-hamate arthroplasty are often very satisfactory. Reasonably good motion is to be expected, with flexion at the affected proximal interphalangeal joint approaching 90°, although a mild loss of terminal extension is common.
|Title of host publication||PIP Joint Fracture Dislocations|
|Subtitle of host publication||A Clinical Casebook|
|Publisher||Springer International Publishing|
|Number of pages||15|
|State||Published - Jan 1 2016|
- PIP joint