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    Wyświetlanie 1-7 z 7
    Tytuł:
    Wertebroplastyka w złamaniach kompresyjnych trzonów kręgów – przegląd piśmiennictwa
    Vertebroplasty in vertebral compression fractures – literature review
    Autorzy:
    Przybyłko, Nikodem
    Kocur, Damian
    Sordyl, Ryszard
    Ślusarczyk, Wojciech
    Antonowicz-Olewicz, Anna
    Kukier, Wojciech
    Wojtacha, Maciej
    Suszyński, Krzysztof
    Kwiek, Stanisław J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1037835.pdf
    Data publikacji:
    2014
    Wydawca:
    Śląski Uniwersytet Medyczny w Katowicach
    Tematy:
    vertebral compression fractures
    osteoporosis
    vertebroplasty
    złamanie kompresyjne trzonu kręgu
    osteoporoza
    wertebroplastyka
    Opis:
    Vertebral compression fractures are the most common complication of osteopo-rosis (1.45 per 1000 women yearly). The main symptom of these fractures is chronic back pain and limitation of movement. Vertebroplasty is a modern minimally invasive operative technique that can significantly reduce pain and improve the quality of life in patients with vertebral compression fractures.
    Złamania kompresyjne trzonów kręgów są najczęstszym powikłaniem osteroporozy (1,45 na 1000 kobiet rocznie). Głównym objawem jest ograniczający pacjenta przewlekły ból kręgosłupa. Wertebroplastyka jest nowoczesną, minimalnie inwazyjną metodą operacyjną, pozwalającą znacząco zredukować ból i poprawić komfort życia pacjenta ze złamaniem kompresyjnym trzonu kręgu.
    Źródło:
    Annales Academiae Medicae Silesiensis; 2014, 68, 5; 375-379
    1734-025X
    Pojawia się w:
    Annales Academiae Medicae Silesiensis
    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:
    Analiza numeryczna segmentu ruchowego odcinka lędźwiowego kręgosłupa człowieka w przypadku wystąpienia kręgozmyku
    Numerical analisis of the motor segment of the lumbar spine with the spondylolisthesis
    Autorzy:
    Joszko, Kamil
    Machnia, Karolina
    Powiązania:
    https://bibliotekanauki.pl/articles/2201501.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Katedra Biomechatroniki
    Tematy:
    symulacja numeryczna
    analiza wytrzymałościowa
    odcinek lędźwiowy
    kręgozmyk
    MES
    numerical simulation
    strength analysis
    lumbar spine
    vertebroplasty
    FEM
    Opis:
    Celem przeprowadzonych badań była ocena obciążeń występujących w odcinku lędźwiowym kręgosłupa człowieka na poziomie L4-L5 dla schorzenia kręgozmyku. Modele numeryczne poszczególnych części segmentu ruchowego zostały wysegmentowane w oparciu o zdjęcia tomografii komputerowej. Następnie w oprogramowaniu MES przeprowadzono analizę numeryczną modelu kręgosłupa fizjologicznie prawidłowego oraz modeli z różnymi stopniami kręgozmyku w następującej skali: 4 mm, 6 mm, 8 mm, 10 mm oraz 12 mm.
    The research carried out a numerical analysis of the loads occurring in the lumbar spine at the L4-L5 level. The project started with modeling the spine diseases in the Inventor 2018 software for different values of spondylolisthesis. In ANSYS Workbench 2013, numerical simulations were performed: analysis of a physiologically correct model, analysis of the mathematical model of the spine with various degrees of spondylolisthesis (4 mm, 6 mm, 8 mm, 10 mm and 12 mm). Models were verified on the basis of literature data.
    Źródło:
    Aktualne Problemy Biomechaniki; 2020, 20; 45--53
    1898-763X
    Pojawia się w:
    Aktualne Problemy Biomechaniki
    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:
    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:
    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
      Wyświetlanie 1-7 z 7

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