Severe osteolysis following metacarpophalangeal arthroplasty with silicone implants: a case report.

We report a rare case of severe osteolysis following metacarpophalangeal (MP) joint arthroplasty using silicone implants in a patient with rheumatoid arthritis. A 72-year-old woman presented with painless masses on the dorsum of the left hand 6 years after MP joint arthroplasty using Sutter-type silicone implants. Radiographic evaluation revealed implant-associated osteolysis and cortical perforation of the second to fifth metacarpals. Revision arthroplasty was performed using grommet-equipped Swanson-type silicone implants combined with synovectomy and iliac bone grafting for severe palmar bone loss. One year later, similar osteolysis occurred in the right hand, and revision arthroplasty was again performed using Swanson-type implants without the need for bone grafting. The postoperative course was uneventful, and no recurrence of osteolysis or implant-related complications was observed over a 7-year follow-up period. Silicone synovitis is a recognised complication of silicone implant arthroplasty, caused by wear debris triggering chronic inflammation and bone resorption. This case highlights the importance of early detection and intervention for implant-related osteolysis. In cases where bone defects remain manageable, revision with grommet-equipped silicone implants can be a viable and durable treatment option. Surgeons should be aware of this potentially severe complication, as delayed intervention may preclude the use of silicone implants altogether due to extensive bone loss.