Xie F, et al. - Treatment of bone loss at the metacarpophalangeal joint (MCP) after trauma is difficult. Researchers herein examined the effectiveness of Swanson’s arthroplasty and sought the reason for implant fracture. The data of 175 patients who received emergency MCP arthroplasty were retrospectively analyzed. To limit the radioulnar movement of the metacarpal joint for 8 weeks, some patients used an orthosis after surgery (Group A), while the other underwent only hand rehabilitation after surgery (Group B). The follow-up data of a total of 162 available patients support the utility of Swanson’s arthroplasty for bone loss at MCP joint. The reason for implant fracture may be the radioulnar stress. The incidence of implant fractures may lower in correlation with applying joint orthosis.