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Information × Registration Number 0225U003280, (0118U003563) , R & D reports Title Improvement of diagnostic and treatment methods of periprosthetic fractures of the femur after the hip joint replacement with osteoporosis popup.stage_title Удосконалення методів діагностики та лікування перепротезних переломів стегнової кістки після ендопротезування кульшового суглоба при остеопорозі. Head Henrikh I. Hertsen, Доктор медичних наук Registration Date 11-06-2025 Organization Shupyk National Healthcare University of Ukraine popup.description1 popup.description2  For the first time, it has been established that patients after primary total cementless hip arthroplasty (HA) experience changes in bone tissue quality over 5-10 years depending on patient age. For instance, the bone mineral density (BMD) of the femur in patients aged (71.08±4.44) years in Gruen zone 5 is significantly lower by 16.6% (p<0.05), and the bone mineral content (BMC) of the femur in Gruen zones 2 and 3 is significantly lower by 34.4% (p<0.03) and 24.3% (p<0.03) respectively, compared to patients aged (62.05±2.25) years. For the first time, using computer 3D modeling, the stress-strain state of the "endoprosthesis stem-femur" model was investigated under axial loading with average human body weight (750 N), establishing that the maximum stress concentration in the cortical layer of the femur of 1.81 MPa is located in the projection zone of the endoprosthesis stem tip, which increases the risk of periprosthetic femoral fractures (PFF) in this area. Product Description popup.authors popup.nrat_date 2025-06-11 Close