Profile of infected synovial samples. All cases were diagnosed with secondary osteoarthritis.
| Case | Age/sex | Years from THR to Revision | Type of Prosthesis | Type of Alloy | Wear | Black Particles | PMMA Particles | No. of Neutrophils (cells/HPF) | Pathogen |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 67 F | 7 | YU | TiA16V4 | + | – | + | > 5 | CNS |
| 2 | 56 F | 5 | YU | TiA16V4 | – | – | – | > 5 | SA |
| 3 | 51 M | 4 | YU | TiA16V4 | – | – | – | > 5 | SE |
| 4 | 79 M | 7 | YU | TiA16V4 | + | – | – | > 5 | CNS |
| 5 | 67 F | 7 | YU | TiA16V4 | – | + | – | > 5 | EC |
| Average | 64 | 6 |
YU: Yamagata University System; THR: total hip arthroplasty; PMMA: polymethyl methacrylate; TiA16V4: titanium-aluminum-vanadium; HPF: high power field; SE: Staph. epidermidis; SA: Staph. aureus; CNS: Coagulase-negative staphylococci; EC: Escherichia coli.