A mathematical model of the pelvis for calculation of its stress-strain state

Tyazhelov, Olexiy; Filipenko, Volodymyr; Yaresko, Oleksandr; Bondarenko, Stanislav

doi:10.15674/0030-59872015125-33

Cited by 8 publications

(5 citation statements)

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“…Біодеградація вищевказаних матеріалів була доведена експериментальними методами [6,7]. Моделювали дефекти верхньої та задньої стінок кульшової западини [8,9], бо ці зони є найбільш навантаженими, через що мають більше клінічне значення.…”

Section: Discussionunclassified

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Study of the Stress-Deformed State of the "Pelvis-Endoprosthesis" System When Filling a Cavity Defect of the Acetabulum With Biodegradable Cements

Poplavska

Filipenko

Karpinsky

et al. 2023

VPBM

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Connection of the publication with planned research works.The research was carried out as part of the scientific topic "Experimental study of bone tissue reactions and biomechanical properties of the "implant-bone" system in the case of using innovative 3d-printed materials from polylactic acid and trabecular titanium", state registration number 0119U102449. Introduction.A positive manifestation of improving the quality of human life is the lengthening of the average life expectancy of the population in developed countries [1]. People want to stay active for as long as possible. It is directly related to the increase in surgical interventions, especially endoprosthesis of large joints [2].Among the complications of the endoprosthesis of the hip joint, instability of the components of the endoprosthesis, of various genesis, is most often singled out. According to the studies, instability is formed in the acetabular component twice as often as in the leg [3,4]. Revision endoprosthesis is indicated in 25% of cases, according to the German Register of Endoprostheses, precisely because of the instability of the endoprosthesis cup [5]. Degenerative diseases such as coxarthrosis contribute to the thinning of bone tissue, the formation of areas of sclerosis, and cysts of the acetabulum. One of the factors that negatively affect the stability of the implant-bone tissue system is the presence of defects

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Section: Discussionunclassified

“…Biodegradation of the above materials was proven by experimental methods [6,7]. Defects of the upper and back walls of the acetabulum were modelled [8,9] because these zones are the most loaded, which is why they have greater clinical significance.…”

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Study of the Stress-Deformed State of the "Pelvis-Endoprosthesis" System When Filling a Cavity Defect of the Acetabulum With Biodegradable Cements

Poplavska

Filipenko

Karpinsky

et al. 2023

VPBM

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“…Для цього зразки навантажували вертикальною розподіленою силою величиною 540 Н, що відповідає середній вазі людини без урахування ваги опорної кінцівки. Між великим вертлюгом лівої стегнової кістки та крилом здухвинної кістки імітували дію привідних м'язів стегна, шляхом введення відповідних сил: m. gluteusmedius (середній сідничний м'яз) -1 150 Н та m. gluteusminimus (малий сідничний м'яз) -50 Н [11,12]. У ділянці колінного суглоба на рівні виростків лівої стегнової кістки всі моделі мали жорстке закріплення.…”

Section: матеріал і методиunclassified

Mathematical modeling of the acetabulum fracture (type 62-B1.3 by AO/ASIF) deformities and hip endoprosthetics in combination with osteosynthesis

Vyrva¹,

Vatamanitsa²,

Karpinsky³

et al. 2023

OTP

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Secondary degenerative disabling changes in the hip joint often develop in the long term after surgical treatment of hip fractures. A well-founded differential approach to the selection of endoprosthesis components and additional means of stabilizing bone fragments is necessary. Objective. To investigate changes in relative deformation values in a hip joint model with a acetabulum fractures 62–B1.3 type by AO/ASIF classification under the conditions of its endoprosthesis using various osteosynthesis options. Methods. A basic finite-element model of the pelvic girdle of a person with a fracture of the bottom of the cruciate ligament type 62-B1.3 (АО/ASIF) was developed, on which 7 variants of endoprosthesis of the left hip joint were modeled: without fracture (1); without osteosynthesis of fragments (2); fixation of a fragment of the acetabulum back wall with two screws (3), two screws and a bone plate (4), two screws and a bone plate with a Jumbo cup implantation (5); 5 case, long screw in the front column (6); option 5, long screws in the front and rear columns (7). Results. When using a large-sized Jumbo cup, the relative deformations of the bone regenerate in the center of the bottom of the KZ were reduced to 1.0 %, regardless of the osteosynthesis option. Around the free fragment of the short circuit, the largest relative deformations (3.0 %) were found in version 5 of the model. The use of long rods in the columns led to decrease in the relative deformations of the bone regenerate around the free fragment of the KZ to 2.0 %. Conclusions. Mathematical models proved that an increase in the number of osteosynthesis tools under the conditions of the total hip endoprosthesis replacement, 62-B1.3 (АО/ASIF) type KZ fracture leads to a decrease in the relative deformations of the bone regenerate along the entire fracture line. The use of a large-sized Jumbo cup makes it possible to reduce the level of relative deformations of the bone regenerate in the central part of the KZ.

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“…Подана робота є продовженням проведених раніше досліджень на математичній моделі таза [9,10]. У модель були внесені певні зміни.…”

Section: матеріал та методиunclassified

“…У математичних розрахунках використано програму ANSYS 14.0. Докладніше умови навантаження описані в попередніх дослідженнях [9,10].…”

Section: матеріал та методиunclassified

Stress-strain state of proximal femur after joint arthoroplasty with neck defect conditions at the minor trochanter level with different stem types

Filipenko¹,

Bondarenko²,

Volodymyr³

et al. 2017

ORTHOPAEDICS, TRAUMATOLOGY and PROSTHETICS

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A mathematical model of the pelvis for calculation of its stress-strain state

Cited by 8 publications

References 0 publications

Study of the Stress-Deformed State of the "Pelvis-Endoprosthesis" System When Filling a Cavity Defect of the Acetabulum With Biodegradable Cements

Study of the Stress-Deformed State of the "Pelvis-Endoprosthesis" System When Filling a Cavity Defect of the Acetabulum With Biodegradable Cements

Mathematical modeling of the acetabulum fracture (type 62-B1.3 by AO/ASIF) deformities and hip endoprosthetics in combination with osteosynthesis

Stress-strain state of proximal femur after joint arthoroplasty with neck defect conditions at the minor trochanter level with different stem types

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