Incidence and Presentation of Periprosthetic Joint Infection After Primary Metacarpophalangeal and Proximal Interphalangeal Arthroplasty

Purpose: Periprosthetic joint infection (PJI) is a devastating complication that has been extensively investigated in large joint arthroplasty. However, this has been inconsistently reported after metacarpophalangeal (MCP) and proximal interphalangeal (PIP) arthroplasty. The objective of the study was to report the presentation and treatment of patients with PJI after MCP or PIP joint arthroplasty.

Methods: We performed a retrospective review of 1418 primary MCP or PIP arthroplasties in 642 patients with a minimum of 180 days of follow-up (mean 9.0 years) at a single institution from 1991 to 2020. We also analyzed the association of patient (body mass index, smoking, diabetes, and immunocompromised status) and surgical (digit, implant, operative time, and reoperation) factors with infection.

Results: There were six joints, all in separate patients, that developed PJI (0.4%). The median time to PJI was 91.5 days. Of the six patients with PJI, five had no systemic symptoms and a normal leukocyte count. The most common cultured organism was Staphylococcus aureus. PJI was most commonly treated with hardware removal and antibiotics.

Conclusions: PJI is uncommon after MCP or PIP arthroplasties. It commonly presents without systemic symptoms or leukocyte count and is most frequently caused by Staphylococcus aureus. More studies are needed to identify the optimal diagnostic criteria, treatment, and preventive strategies of PJI of the MCP and PIP joints.

Type of study/level of evidence: Therapeutic IV.