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Tytuł:
Experimental investigations of the PMMA bone cement distribution inside a model of lumbar vertebrae
Autorzy:
Bonik, Artur
Tyfa, Zbigniew
Ciupik, Lechosław Franciszek
Sobczak, Krzysztof
Kierzkowska, Agnieszka
Obidowski, Damian Stanisław
Witkowski, Dariusz
Pałczyński, Tomasz
Elgalal, Marcin
Komorowski, Piotr
Słoński, Edward
Jóźwik, Krzysztof
Walkowiak, Bogdan
Powiązania:
https://bibliotekanauki.pl/articles/2232172.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
percutaneous vertebroplasty
osteoporotic spinal fractures
spinal cement injection
cement distribution
bone cement preparation
Opis:
The use of bone cement in procedures such as vertebroplasty and kyphoplasty can reduce pain and mechanically support the spine. This study aimed to evaluate whether air entrapped within bone cement affected its distribution in a vertebral body model. The study included 3D printed anatomical models of vertebrae together with their internal trabecular structure. Aeration was achieved by mixing the bone cement using three different altered procedures, whilst the control sample was prepared according to the manufacturer’s instructions. The further two samples were prepared by reducing or increasing the number of cycles required to mix the bone cement. A test rig was used to administer the prepared bone cement and introduce it into the vertebral model. Each time the injection was stopped when either the cement started to flow out of the vertebral model or when the entire cement volume was administered. The computer tomography (CT) scanning was performed to evaluate aerification and its influence on the bone cement distribution in each of the patient-specific models. The large number of small pores visible within the cement, especially in the cannula vicinity, indicated that the cement should not be treated as a homogenous liquid. These results suggest that a high level of aerification can influence the further cement distribution.
Źródło:
Engineering of Biomaterials; 2022, 25, 165; 23--30
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of selected properties of cements modified with glassy carbon and cancellous bone
Autorzy:
Choryłek, P.
Powiązania:
https://bibliotekanauki.pl/articles/1818495.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
bone cement
PMMA
acrylic bone cement
vertebroplasty
kyphoplasty
glassy carbon
cancellous bone
cement kostny
akrylowy cement kostny
wertebroplastyka
kyfoplastyka
węgiel szklisty
kość gąbczasta
Opis:
Purpose: The aim of this manuscript was to study and analyse the properties of bone cement (VertaPlex) before and after modification with glassy carbon (Alfa Aesar) and human bone (MaxGraft). Design/methodology/approach: To achieve the assumed goal, a series of samples was made - five samples for each mixture, where: 5 bone cement samples, 5 bone cement samples mixed with 20-50 μm glassy carbon in the ratio of 1 g carbon per 40 g of cement, and 5 samples of bone cement mixed with 20-50 μm glassy carbon and human bone in the ratio of 1 g of carbon per 40 g of cement and 0.4 g of bone per 40 g of cement. The produced samples (4 for each mixture, 1 was the reference sample) were subjected to tests - compression test, microscopic observations with a 3D microscope, surface profile tests and hardness tests. Findings: The study has shown that modifications with glassy carbon and bone change the mechanical properties, as well as the strength of the samples. Compression tests have shown that the material without admixtures is characterized by the highest compressive strength and the doping of the glassy carbon itself makes the material more brittle. A significant increase in hardness was also observed for samples with glassy carbon and bones after the pressing process. Practical implications: The study was made synthetically, without taking into account the effect of the environment of body fluids and the human body temperature. This study is an introduction to further considerations where samples for which these conditions will be applied are currently being prepared. Originality/value: For commercial use, in treatment of patients, cements modified with glassy carbon and bone glassy carbon have not been used so far. Due to the prerequisites of a positive effect of glassy carbon addition on osseointegration and biocompatibility, the study in this area has been undertaken.
Źródło:
Archives of Materials Science and Engineering; 2020, 105, 1; 31--41
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical prediction of component-ratio-dependent compressive strength of bone cement
Autorzy:
Machrowska, Anna
Karpiński, Robert
Jonak, Józef
Szabelski, Jakub
Krakowski, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/117777.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
artificial neural networks
mathematical modelling
biomaterials
bone cement
sztuczne sieci neuronowe
modelowanie matematyczne
biomateriały
cement kostny
Opis:
Changes in the compression strength of the PMMA bone cement with a variable powder/liquid component mix ratio were investigated. The strength test data served to develop basic mathematical models and an artificial neural network was employed for strength predictions. The empirical and numerical results were compared to determine modelling errors and assess the effectiveness of the proposed methods and models. The advantages and disadvantages of mathematical modelling are discussed.
Źródło:
Applied Computer Science; 2020, 16, 3; 87-101
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of glassy carbon and cancellous bone admixture on performance and thermal properties of acrylic bone cements
Autorzy:
Choryłek, P.
Postawa, P.
Powiązania:
https://bibliotekanauki.pl/articles/1818510.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
bone cement
PMMA
acrylic bone cement
vertebroplasty
kyphoplasty
glassy carbon
cancellous bone
cement kostny
akrylowy cement kostny
wertebroplastyka
kyfoplastyka
węgiel szklisty
kość gąbczasta
Opis:
Purpose: of the research is to physically modify the composition of bone cements with glassy carbon and cancellous bone to improve its performance, reduce polymerization temperature and reduce the ability of cements the effect of admixture on the phenomenon of relaxation. Design/methodology/approach: SpinePlex bone cement was modified with glassy carbon powder with 20-50 pm granulation with Maxgraft®. Maxgraft cancellous bone has been ground to 20-50 pm grains. Samples of unmodified cements (reference) and modified with glassy carbon and cancellous bone were prepared for the tests. The glassy carbon powder and ground cancellous bone were premixed with the cement copolymer powder, and then the premix prepared this way was spread in a liquid monomer. To delay the polymerization process, all components were cooled before mixing to 15°C. The addition of glassy carbon was 0.4 g and the addition of cancellous bone was 0.2 g per 20 g of cement powder, i.e. about 1.96% by mass. Polymerization temperature, relaxation and differential scanning calorimetry tests were performed on the samples made. Findings: Additives used allow: to reduce the polymerization temperature, as well as rheological properties. During the studies it was found that the additive which can meet the requirements is glassy carbon in form of powder and cancellous bone. Research limitations/implications: The results presented in the publication require further advanced research, which will be the subject of further modification attempts by the research team. Practical implications: The conducted tests showed a significant effect of glassy carbon as a modifier on the mechanical properties of cement after its solidification, but also on the course of the polymerization process. Temperature registration tests during crosslinking, tests of mechanical properties (behaviour of cement samples under load) and DSC differential scanning calorimetry analysis confirmed that the addition of glassy carbon had an effect on each of these aspects. Originality/value: The original in these studies is the possibility to improve fundamental properties of the selected bone cements by using different than commonly used additives.
Źródło:
Archives of Materials Science and Engineering; 2020, 104, 1; 30--40
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of structure and properties of PMMA-based bone cements with hydroxyapatite after degradation process
Autorzy:
Laska-Leśniewicz, Anna
Raczyńska, Małgorzata
Wrotniak, Maciej
Sobczyk-Guzenda, Anna
Powiązania:
https://bibliotekanauki.pl/articles/286094.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
bone cement
PMMA
hydroxyapatite
vertebroplasty
Opis:
PMMA-based bone cements are commonly used for implant fixation or as bone void fillers. Hydroxyapatite added as a filler to bone cement may positively affect the final properties of the material, in particular its biological properties. In this study, the preparation of poly(methyl methacrylate)-based bone cements with incorporated hydroxyapatite (HAp) is reported. The purpose of this article is to examine the proper-ties of bone cements enriched with HAp filler (the concentration of 3wt% and 6wt%) and reveal the changes in the composites properties (chemical structure, surface morphology and distribution of HAp in the composite matrix, moisture absorption, hardness in Shore D scale) during the long-term incubation in the PBS (phosphate-buffered saline) solution at 37°C. The incubation lasted up to 21 days, but only the period when the changes actually occurred was analysed. The studies have shown that the samples containing HAp absorb more moisture and have a lower hardness. These characteristics vary depending on the concentration of HAp. There is no elution of HAp and ZrO2 from the composite during the incubation. The surface morphology and chemical structure do not change during long-term studies. The obtained bone cements are characterized by high stability in the PBS solution.
Źródło:
Engineering of Biomaterials; 2019, 22, 151; 9-16
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertebroplasty and kyphoplasty - advantages and disadvantages used bone cement of PMMA
Autorzy:
Choryłek, P.
Powiązania:
https://bibliotekanauki.pl/articles/368484.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
vertebroplasty
kyphoplasty
bone cement
PMMA
compression fractures
wertebroplastyka
kyfoplastyka
cement kostny
poli(metakrylan metylu)
złamanie kompresyjne
Opis:
Purpose: This paper is a review of literature where the analyses of the commonly used bone cements were carried out especially: methods of manufacturing, surgical techniques, mechanical properties, biocompatibility studies as well as possibility of improvement some properties by using additives. Design/methodology/approach: The aim of this publication is the analysis of the state of knowledge and treatment methods on compression fractures, approximation of the specifics of compression fractures, presentation of minimally invasive percutaneous surgical techniques, description of features of the most common used bone cement on matrix Poly(methyl methacrylate) – (PMMA) and presentation cement parameters which affect potential postoperative complications. Findings: In considering to review of actual state of knowledge there is a need to find the additives which allow: to reduce the polymerization temperature, improve the biocompatibility as well as mechanical properties. During the studies it was found that the additive which can meet the requirements is glassy carbon in form of powder. Practical implications: Discussion allows to prepare samples during practical work with new kind additives in composite with bone cement as matrix. Originality/value: The original in this discussion is the possibility to improve fundamental properties of the selected bone cements by using different than commonly used additives.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2019, 92, 1-2; 36-49
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antibacterial activity assessment of bioactive modifiers for bone cements
Autorzy:
Wekwejt, M.
Pałubicka, A.
Świeczko-Żurek, B.
Powiązania:
https://bibliotekanauki.pl/articles/286133.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
bone cement
bioactivity
modification
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 58
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pullout evaluation of sawbone experiment in different types of pedicle screws combined with bone cement augmentation for severe osteoporotic spine
Autorzy:
Yang, S.-C.
Liu, P.-H.
Tu, Y.-K.
Powiązania:
https://bibliotekanauki.pl/articles/307271.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
osteoporoza
kości
wytrzymałość
osteoporosis
bone cement augmentation
cannulated pedicle screw
sawbone
pullout strength
Opis:
Purpose: The conventional screw is unable to provide enough screw-bone interface strength for osteoporotic cencellous bone, and complications resulting from loosening or failure of the implants remain a significant clinical problem. Hence, the purpose of this study is to investigate pullout strength and energy in three types of the pedicle screws, including conventional solid pedicle screw, cannulated pedicle screw, and cannulated pedicle screw with a central pin, using osteoporotic sawbone test block with different bone cement volumes through pullout force testing. Methods: The control group (n = 15) of the osteoporotic sawbone test block includes groups A, B, and C to reflect three types of the pedicle screws without bone cement augmentation. The cemented group (n = 45) of the osteoporotic sawbone test block includes groups D1, D2, D3, E1, E2, E3, F1, F2, and F3 to reflect three types of the pedicle screws with PMMA bone cement of 2, 3, and 4 mL augmentation. Results: The results showed that the pullout strength and energy in the cemented group were significantly larger than that in the control group. Moreover, the best performances of the pullout strength and energy in the cemented group were evidenced obviously in the case of cannulated pedicle screw with a central pin with 4 mL bone cement augmentation. Conclusions: This study concludes that cement argumentation in the cannulated pedicle screw with a central pin can increase a pullout strength of pedicle screw for severe osteoporotic patients while bone cement of injective volume is limited.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 2; 55-64
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acrylic bone cements modified with PEG/alginic acid shape stabilized phase change materials
Autorzy:
Sobota, D.
Król-Morkisz, K.
Pielichowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/283945.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
bone cement
biomaterials
bone tissue
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 57
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the choice of thickness of the cement mantle in cemented hip arthroplasty
Autorzy:
Levadnyi, I.
Awrejcewicz, J.
Loskutov, A.
Szymanowska, O.
Powiązania:
https://bibliotekanauki.pl/articles/279791.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
total hip replacement
bone cement
femur
stress state
finite elements method
Opis:
Recommendations for the optimal thickness of the cement mantle in cemented hip arthroplasty are outlined based on the results obtained with the finite element method. The investigations show that distal femur cement thickness higher than 2 mm positively affects mechanical behaviour of the cement mantle and can be useful in reducing stress-strain levels in the distal part of the femur what leads to prevention of development of a stress-shielding effect. The results of the study can contribute to the success of long-term implants.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1235-1244
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential degradation of bone cement used in maxillo-facial surgery
Autorzy:
Wekwejt, M.
Świeczko-Żurek, B.
Bartmański, M.
Powiązania:
https://bibliotekanauki.pl/articles/285419.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
maxillofacial surgery
biodegradation
bone cement
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 31
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cement i implanty szkło-jonomerowe do stosowania w otochirurgii
Glass-ionomer cement and implants for use in otosurgery
Autorzy:
Skarżyński, H.
Karaś, J.
Floriańczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/167969.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
Tematy:
otochirurgia
niedosłuch
ubytki kostne
rekonstrukcje
cement szkło-jonomerowy
implanty szkło-jonomerowe
badania kliniczne
otosurgery
hypoacusia
bone defects
reconstructions
glass-ionomer cement
glass-ionomer implants
clinical studies
Opis:
W artykule przedstawiono cement i implanty szkło-jonomerowe, do stosowania w otochirurgii, opracowane i wytworzone w Instytucie Ceramiki i Materiałów Budowlanych. Leczenie niedosłuchu wymaga rekonstrukcji ubytków w łańcuchu kosteczek słuchowych w uchu środkowym w przypadkach patologicznych spowodowanych przewlekłymi stanami zapalnymi, urazem lub wadami wrodzonymi. Kliniczne badania zostały przeprowadzone w Instytucie Fizjologii i Patologii Słuchu w Kajetanach. W artykule zaprezentowano wyniki tych długoterminowych badań. Zastosowanie materiałów szkło-jonomerowych jest najlepszym sposobem trwałego odtworzenia uszkodzonego układu przewodzącego w uchu środkowym, umożliwia szeroki zakres anatomicznych rekonstrukcji ubytków kostnych będących rezultatem procesów chorobowych lub usunięcia chirurgicznego. Anatomiczne rekonstrukcje pozwalają odzyskać pierwotną i optymalną funkcję leczonych struktur. Zastosowanie implantów szkło-jonomerowych znacząco skraca czas operacji. W jednakowym stopniu są one przydatne w leczeniu otochirurgicznym dzieci i dorosłych.
In this paper glass-ionomer cement and implants for use in otosurgery, which were developed and produced at the Institute of Ceramics and Building Materials, were presented. Treatment of hypoacusia requires defects to be reconstructed in the ossicular chain of middle ear in the cases of pathology resulting from chronic ear inflammations, trauma or congenital malformations. The clinical studies have been performed at the Institute of Physiology and Pathology of Hearing in Kajetany. Results of these long-term studies were presented. The application of glass-ionomer materials is the best method giving excellent results with regard to the reconstruction of a damaged conducting system in the middle ear. The use of cement and implants allows the wide range of anatomical reconstructions of bone defects that are result of disease processes or surgical removal. The anatomic reconstructions allow to restore primary and optimal function of the treated tissues. Application of glass-ionomer implants enables significant reduction in operation time. The glass-ionomer cement and implants are equally useful for reconstructive surgery in children and adults.
Źródło:
Szkło i Ceramika; 2013, R. 64, nr 1, 1; 1-7
0039-8144
Pojawia się w:
Szkło i Ceramika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical properties of the novel biphasic hydroxyapatite–magnesium phosphate biomaterial
Autorzy:
Pijocha, D.
Zima, A.
Paszkiewicz, Z.
Ślósarczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/307424.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
composite
bone substitute
hydroxyapatite
magnesium phosphate cement
kompozyty
hydroksyapatyt
materiałoznawstwo
Opis:
Besides high-temperature calcium phosphates (CaPs), low-temperature calcium phosphate bone cements (CPCs), due to excellent biological properties: bioactivity, biocompability and osteoconductivity, are successfully used as bone substitutes. However, some disadvantages, related mainly to their low resorption rate and poor mechanical properties result in limited range of applications of these implant materials to non-loaded places in the skeletal system. To overcome this problem, magnesium phosphate cements (MPCs) with high strength have been considered as biomaterials. The main disadvantage of MPCs is that the acid-base setting reaction is an exothermic process that must be strictly controlled to avoid tissue necrosis. In this work, a new composite bone substitute (Hydroxyapatite Magnesium Phosphate Material – HMPM) based on hydroxyapatite (HA) and magnesium phosphate cement (MPC) with sodium pyrophosphate applied as a retardant of setting reaction was obtained. Its setting time was adequate for clinical applications. Combining properties of HA and MPC has made it possible to obtain microporous (showing bimodal pore size distribution in the range of 0.005–1.700 micrometers) potential implant material showing good surgical handiness and sufficient mechanical strength. Effectiveness of sodium pyrophosphate as a retardant of exothermic setting reaction of the new cement formulation was confirmed. After setting and hardening, the material consisted of hydroxyapatite and struvite as crystalline phases. Unreacted magnesium oxide was not detected.
Źródło:
Acta of Bioengineering and Biomechanics; 2013, 15, 3; 53-63
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of changes of thermal properties and structures of the bone cements after ageing processes
Analiza zmian właściwości termicznych i struktury cementu kostnego po procesach starzenia
Autorzy:
Szarek, A.
Gnatowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/98877.pdf
Data publikacji:
2011
Wydawca:
Politechnika Śląska. Katedra Biomechatroniki
Tematy:
bone cement
ageing
thermal properties
structure
cement kostny
starzenie
własności termiczne
struktura
Opis:
This paper presents the results of the investigations of thermal properties and the structure of bone cements developed based on polymethyl methacrylate with addition of fillers and auxiliaries. DSC method was employed to determine glass transition temperature for the studied bone cements before and after the process of aging in water NaCl solution subject to electrolysis. The investigations were carried out for bone cements with different composition and different percentage share of the components. Two types of bone cements were used for the investigations: CMW1 manufactured by CMW and Palamed 40. Thermal properties were analysed using differential scanning calorimetry by means of Netzsch DSC 200 Phox equipment. The structure was examined by means of Nikon Eclipse E 200 optical microscope.
W artykule określono metodą DSC wartości temperatury zeszklenia PMMA przed i po procesie starzenia w roztworze wodnym NaCl poddanym elektrolizie. Badania przeprowadzono dla PMMA o różnym składzie i udziale procentowym składników. Do badań zastosowano dwa rodzaje cementów kostnych: CMW1 oraz Palamed 40. Dla części materiału badawczego przeprowadzono proces przyspieszonego starzenia w celu określenia odporności chemicznej na czynniki powodujące korozję i degradację cementu kostnego. Badania właściwości termicznych wykonano metodą różnicowej kalorymetrii skaningowej, wykorzystując urządzenie DSC 200 Phox firmy Netzsch. Strukturę obserwowano pod mikroskopem optycznym firmy Nikon Eclipse E 200.
Źródło:
Aktualne Problemy Biomechaniki; 2011, 5; 153-158
1898-763X
Pojawia się w:
Aktualne Problemy Biomechaniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ procesów starzenia na wytrzymałość mechaniczną cementu kostnego
Effect of the processes of aging on mechanical strength in bone cements
Autorzy:
Szarek, A.
Powiązania:
https://bibliotekanauki.pl/articles/98821.pdf
Data publikacji:
2010
Wydawca:
Politechnika Śląska. Katedra Biomechatroniki
Tematy:
starzenie
wytrzymałość mechaniczna
cement kostny
sztuczny staw
endoproteza
aging
mechanical strength
bone cement
artificial joint
endoprosthesis
Opis:
Wytrzymałość mechaniczna poszczególnych elementów sztucznych stawów ma zasadnicze znaczenie na ich żywotność w organizmie. Ze względu na złożony stan naprężeń oraz agresywne środowisko wewnątrz organizmu człowieka powoduje, że wraz z upływem czasu zmieniają się właściwości wytrzymałościowe poszczególnych elementów endoprotez. Ponieważ wpływ starzenia na spadek wytrzymałości PMMA stosowanego do mocowania protezy w kości, może spowodować obluzowanie się protezy w kości, w artykule przedstawiono wyniki badań pozwalających na określenie wielkości tych zmian w okresie pierwszych 6 lat po polimeryzacji.
Mechanical strength in each part of artificial joints is of essential importance to their life in the body. A complex distribution of stress combined with aggressive environment inside human body causes that strength properties in the part of endoprostheses change in the course of time. Since the effect of aging on the decline of strength in PMMA used for fixation of the prosthesis in bone might cause that the prosthesis comes loose in the bone, this paper presents the results of the investigations which allow for determination of the extent of these changes in the period of first 6 years after polymerization.
Źródło:
Aktualne Problemy Biomechaniki; 2010, 4; 191-194
1898-763X
Pojawia się w:
Aktualne Problemy Biomechaniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 18

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