STUDY OF THE STRESS-DEFORMED STATE OF THE “PELVIS-ENDOPROSTHESIS” SYSTEM WHEN FILLING A CAVITY DEFECT OF THE ACETABULUM WITH BIODEGRADABLE CEMENTS

  2. 2023
  3. STUDY OF THE STRESS-DEFORMED STATE OF THE “PELVIS-ENDOPROSTHESIS” SYSTEM WHEN FILLING A CAVITY DEFECT OF THE ACETABULUM WITH BIODEGRADABLE CEMENTS

Poplavska K. S., Filipenko V. A., Karpinsky M. M., Yaresko O. V.

STUDY OF THE STRESS-DEFORMED STATE OF THE "PELVIS-ENDOPROSTHESIS" SYSTEM WHEN FILLING A CAVITY DEFECT OF THE ACETABULUM WITH BIODEGRADABLE CEMENTS

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About the author:

Poplavska K. S., Filipenko V. A., Karpinsky M. M., Yaresko O. V.

Heading:

METHODS AND METHODOLOGIES

Type of article:

Scientific article

Annotation:

The instability of endoprosthesis components of various genesis occurs most often among complications of hip joint replacement. The presence of defects in the acetabulum is one of the factors that negatively affect the stability of the implant-bone tissue system. The purpose of the study was to determine the changes in the mechanical stresses arising in the acetabulum during endoprosthesis, which occur in the presence of cavity defects, and the change in indicators when filling these defects with biodegradable cement (of two types). Mathematical modelling of the stress-deformation state of the "pelvis-endoprosthesis" system while filling the acetabulum's cavity defect with biodegradable cement was carried out. Cavity defects of the upper and back walls of the acetabulum were modelled. It has been proven that cavity defects of the upper and back walls of the acetabulum lead to increased mechanical stress, both around the defect and in other areas of the acetabulum. Filling bone tissue defects with biodegradable bone cement can reduce the acetabulum's stress level. When a cavity defect occurs, an increase in the amount of stress in the acetabulum can negatively affect the stability of the acetabular component of the endoprosthesis. The presence of defects, without their plastic replacement, provokes the appearance of overload zones and negatively affects the fixation of the acetabular component. The use of biodegradable cement based on tricalcium phosphate allows to reduce the stress level in the acetabulum, and the addition of hydroxylapatite to the cement composition brings the stress indicators closer to the level of the model without a defect, which creates conditions for the formation of a full-fledged contact at the endoprosthesis/ bone tissue interface.

Tags:

acetabulum, bone cement, cavity defect, endoprosthesis

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Publication of the article:

«Bulletin of problems biology and medicine», 2023 Issue 2, 169, 331-345 pages, index UDC 616.718.4-001.5-053.9-089.843:004.942](045)

DOI:

10.29254/2077-4214-2023-2-169-331-345

2023 Issue 2, 169
acetabulum bone cement cavity defect endoprosthesis
29.06.2023
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