Modular calcar replacement prosthesis with strengthened taper junction in total hip arthroplasty.

摘要: Whereas femoral component modularity allows the surgeon to address a variety of defects in complex total hip arthroplasty (THA), breakage modular stems is known complication that typically occurs at taper junction. In response, proprietary process roller-hardening increases strength by factor 3.5 was introduced 1999. The authors reviewed consecutive series patients single who underwent cementless revision or difficult primary THA with roller-hardened calcar replacement prosthesis, and have potential for minimum two-year follow up. 116 patients, 123 hips were involved. Two surgeries primary, 101 revision/conversion, 18 reimplantation after treatment infection, two intramedullary femur constructs, one which sepsis. patients' ages surgery averaged 71 years, BMIs 28.12 kg/m2. Nine all involvement, lost contact. Twenty-one three whom had bilateral expired during follow-up period implant outcome known. Follow up survived 44 (range: 18-78) months. Six components been revised: (1.6%) due recurrent sepsis, (2.4%) (0.8%) from periprosthetic fracture, none septic loosening breakage. Survivorship aseptic as end-point 100%. this series, appears improve durability tapered No devices failed However, their use not recommended totally deficient proximal femur, fatigue breaks distally fixed monoblock extensively coated reported. Caution advised when potting anchoring any stem diaphysis without reconstituting bone stock support.