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Mechanical stability of the cementless acetabular component with three spikes
Y Hamada1, N Akamatsu, Y Yamamoto
1Department of Orthopaedic Surgery, Yamanashi Medical University, Japan.
Artificial Organs
|October 23, 1997
Summary
This study shows a cementless acetabular component with 3 spikes offers favorable stability and prevents osteolysis. Optimal insertion angles and bone grafting enhance mechanical stability, especially in osteoarthritis patients.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
Background:
- Cementless acetabular components are crucial for hip arthroplasty.
- Assessing long-term stability and osteolysis prevention is essential for component design.
Purpose of the Study:
- To evaluate the 5-year stability of a novel cementless acetabular component with 3 spikes.
- To assess the component's efficacy in preventing osteolysis and enhancing mechanical stability.
Main Methods:
- A prospective study followed 65 patients with cementless acetabular components for over 5 years.
- Radiographic analysis and clinical assessment were used to evaluate component stability and radiolucency.
- Specific insertion angles (35° open, 10° anteversion) and bone grafting techniques were employed.
Main Results:
- Favorable stability was achieved in 50 out of 65 patients across various diagnoses, including osteoarthritis, aseptic necrosis, and rheumatoid arthritis.
- One case showed osteolysis around the femoral component, but not the acetabular component.
- Radiolucent lines and component movement were observed in specific cases of osteoarthritis with acetabular hypoplasia and rapidly destructive coxarthrosis.
Conclusions:
- The cementless acetabular component with 3 spikes demonstrates effectiveness in preventing osteolysis.
- Optimized insertion angles and bone grafting contribute to superior mechanical stability, particularly in osteoarthritic patients.