Long-term outcomes of proximal interphalangeal joint surface replacement arthroplasty.

Background: Surface replacement arthroplasty is a reconstructive alternative for the treatment of pain and deformity due to osteoarthritis and rheumatoid arthritis of the proximal interphalangeal joint of the finger. This retrospective study was performed to examine long-term outcomes of proximal interphalangeal joint prosthetic surface replacement with a proximal cobalt-chromium (CoCr) and distal ultra-high molecular-weight polyethylene component over thirty years at a single institution.

Methods: Sixty-seven prostheses were implanted in forty-seven patients between 1974 and 2007.

Comparative 3D quantitative analyses of trapeziometacarpal joint surface curvatures among living catarrhines and fossil hominins.

Comparisons of joint surface curvature at the base of the thumb have long been made to discern differences among living and fossil primates in functional capabilities of the hand. However, the complex shape of this joint makes it difficult to quantify differences among taxa. The purpose of this study is to determine whether significant differences in curvature exist among selected catarrhine genera and to compare these genera with hominin fossils in trapeziometacarpal curvature.

Long-term outcomes of first metacarpal extension osteotomy in the treatment of carpal-metacarpal osteoarthritis.

Purpose: The purpose of this study was to investigate the long-term outcomes of first metacarpal extension osteotomy in the treatment of osteoarthritis of the thumb carpal-metacarpal joint.

Methods: We retrospectively reviewed 8 patients treated by a single surgeon with first metacarpal extension osteotomy.

Results: Preoperative Eaton stage was I in 3 patients, II in 3 patients, and III in 2 patients.

The clinical implications of scaphotrapezium-trapezoidal arthritis with associated carpal instability.

Purpose: Common causes of dorsal intercalated segment instability (DISI) include scapholunate dissociations and scaphoid fracture nonunions. Although less common than these, scaphotrapezium-trapezoidal (STT) osteoarthritis (OA) may also be associated with the development of a DISI deformity. The clinical implications of this form of carpal instability in cases of STT arthritis are still unknown.