Does fracture of cementless femoral stem at the mid-stem junction in modular revision hip arthroplasty systems?
We concluded that the stem failure was initiated by a fretting fatigue mechanism and was propagated by a pure bending fatigue mechanism. Risk factors for fractures of the modular junction include excessive body weight and inadequate proximal osseous support because of trochanteric osteotomy, reduced preoperative bone stock, osteolysis, loosening, and/or implant undersizing. Surgeons should consider the use of implants with strengthened junctions when using modular stems in such patients.
Inadequate antibiotic therapy is associated with longer LOS and higher costs in complicated SSIs. Risk factors for IAT include prior antibiotic therapy, polymicrobial infection, infection with P. aeruginosa or Enterococcus spp., and abdominal incisions.