Abstract
PMMA has important micro structural heterogeneities such as cavities, and its elastic behavior is greatly affected by the presence of defects that may imply its weakening and cause failure. In areas of high concentrations of stress and due to the presence of cavities, micro cracks appear after crushing cavities due to patient movements, and grow and weld to each other until they form a macro fissure that propagates until the total removal of the prosthesis.. In this study, the existence of a crack emanating from a cavity with a diameter of 0.7 mm was assumed; our assessment takes into account two parameters, the position of the crack in the cement and we calculated the stress intensity factor (SIF) in the proximal part of orthopedic cement.
Highlights
D uring total hip arthroplasty, the surgeon replaces the two surfaces of the natural joint (the femoral head and the acetabulum of the iliac bone) with two prosthetic components: the cupule and the femoral implant
D uring total hip arthroplasty, the surgeon replaces the two surfaces of the natural joint with two prosthetic components: the cupule and the femoral implant
The existence of a crack emanating from a cavity was assumed; its assessment takes into account two parameters, the position of the crack in the cement and the stress intensity factor (SIF) that was calculated in the proximal part of orthopedic cement
Summary
D uring total hip arthroplasty, the surgeon replaces the two surfaces of the natural joint (the femoral head and the acetabulum of the iliac bone) with two prosthetic components: the cupule and the femoral implant.
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