Cr. Ashworth et al., SWANSON PROXIMAL INTERPHALANGEAL JOINT ARTHROPLASTY IN PATIENTS WITH RHEUMATOID-ARTHRITIS, Clinical orthopaedics and related research, (342), 1997, pp. 34-37
One hundred thirty-eight Swanson proximal interphalangeal replacements
were implanted in patients with rheumatoid arthritis, of which 99 imp
lants were available for average 5.8 years followup, Pain was severe i
n 1%, moderate in 4%, slight in 28%, and not present in 67%, The avera
ge preoperative active are of motion was 38 degrees, and postoperative
29 degrees, Ten fractures were found, and were revised, Of 45 patient
s assessed, 45 (100%) reported the ability to feed themselves, 43 (96%
) to button their clothes, and 42 (93%) to write, There was sclerosis
of bone around 78% of the implants and resorption adjacent to 12% of t
he implants, Survivorship analysis showed that 81% of implants were no
t revised at 9 years.