The Journal of Bone and Joint Surgery, Vol 58, Issue 4 483-487, Copyright © 1976 by Journal of Bone and Joint Surgery, Inc
Review and analysis of silicone-rubber metacarpophalangeal implants
RD Beckenbaugh, JH Dobyns, RL Linscheid and RS Bryan
A series of 530 consecutive arthroplasties using silicone-rubber implants
in 119 patients was reviewed. Clinical and roentgenographic evaluations
were completed on sixty patients and 254 implants, with an average
follow-up of two and a half years; the remaining fifty-nine patients were
evaluated by questionnaire. All but three patients had rheumatoid disease,
usually with severe deformity, and many of the patients underwent other
procedures on the upper extremity; these procedures often precluded early
motion after the arthroplasties. Three prostheses (0.6 per cent) were
removed because of infection, and reoperation was required in 2.4 per cent
of the joints. Detailed clinical follow-up of 254 prostheses revealed the
following: for Swanson prosthesis-average motion 38 degrees, fracture rate
26.2 per cent, and recurrence of clinical deformity 11.3 per cent; for
Neibauer prostheses-average motion 35 degrees, fracture rate 38.2 per cent,
and recurrence of clinical deformity 44.1 per cent. It should be noted that
use of early implant types and some variations from the designer's
recommended rehabilitation protocols were features of this series.
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