A second-generation cementless total hip arthroplasty mean 9-year results

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Medical Device Engineering

Background:

• Total hip arthroplasty (THA) is a common procedure for end-stage hip arthritis.
• Cementless fixation offers potential for long-term biological integration.
• Component design, including porous coating and collar presence, influences fixation and outcomes.

Purpose of the Study:

• To assess the long-term clinical and radiographic outcomes of a specific cementless total hip arthroplasty system.
• To evaluate the survivorship and complication rates of circumferentially, proximally porous-coated, collared femoral components and cementless, hemispherical, porous-coated acetabular components.

Main Methods:

• A retrospective review of 258 primary THAs in 231 patients.
• Utilized a circumferentially, proximally porous-coated, collared femoral component and a cementless, hemispherical, porous-coated acetabular component.
• Follow-up averaged 9 years (range 5-14 years), with assessment of component revision, loosening, and osteolysis.

Main Results:

• Ten-year survivorship was 92% (revision or loosening), 98% (femoral aseptic loosening), and 99% (acetabular aseptic loosening).
• Four femoral components required revision (2 infection, 2 aseptic loosening); one additional was radiographically loose.
• Nine hips underwent acetabular revision (instability, infection, loosening, osteolysis); 13% of hips showed osteolysis.

Conclusions:

• The evaluated cementless THA system demonstrates favorable long-term survivorship and low rates of aseptic loosening.
• Infection remains a significant cause for femoral component revision.
• Osteolysis occurred in a notable percentage of cases, warranting continued monitoring.