Prosthetic arthroplasty of the proximal interphalangeal joint using a surface replacing implant (CapFlex-PIP): 3-year outcomes

Abstract

The aim of this retrospective study was to evaluate the outcomes after prosthetic arthroplasty of the proximal interphalangeal joint. Of 73 prostheses, 67 were available for follow-up at a median of 35 months (range 10–78 months). The median brief Michigan Hand Questionnaire score was 88/100 (interquartile range [IQR] 69–98), quickDASH 11 (IQR 1–29), pain on the visual analogue scale during activity 0 (IQR 0–2) and at rest 0 (IQR 0). Median range of motion improved from 50° (IQR 40°–70°) to 70° (IQR 53°–88°; p < 0.001). Preoperatively, there was axial deviation of >15° in 15 (23%) joints, with none postoperatively. There were no signs of loosening or migration of the prostheses. Two cases required revision with the implant staying in situ. In two cases, the prosthesis was removed and the joint was fused. Prosthetic arthroplasty of the proximal interphalangeal joint using a modular surface gliding implant is a good option for patients with primary osteoarthritis achieving acceptable pain relief, range of motion and axial stability.   Level of evidence: IV