National Repository of Grey Literature 13 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Optimizing and Evaluating the Biocompatibility of Fiber Composites with CaP Additives
Suchý, Tomáš ; Sucharda, Zbyněk ; Balík, Karel ; Sochor, M. ; Bačáková, Lucie
Composite materials based on a polyamide fabric (aramid) and a polydymethyl-siloxane (PDMS) matrix were designed for application in bone surgery. In order to increase the bioactivity, 2, 5, 10, 15, 20 and 25 vol. % of nano/micro hydroxyapatite (HA) and tricalcium phosphate (TCP) were added. The effect of the additives on the biocompatibility was studied. It appears that nano additives have a more favorable effect than micro particles on mechanical properties. For final application of the composites as substitutes for bone tissues, 15 vol. % of nano hydroxyapatite additives is an optimum amount: in this case both the mechanical properties and the biological properties are optimized without distinct changes in the inner structure of the composite.
The Influence of Steam Sterilization Processes on the Micro- and Macromechanical Properties of Polyamide Fiber-Reinforced PDMS Composites for Medical Device Applications
Sochor, M. ; Balík, Karel ; Sedláček, R. ; Suchý, Tomáš ; Sucharda, Zbyněk ; Šepitka, J. ; Lukeš, J.
The effect of multiple steam sterilization processes on the structural integrity of the polymer matrix composite polydimethylsiloxane (PDMS) reinforced with polyamide fibers (Aramid) is investigated by 3- and 4-point bending tests and by nanoindentation.
Sterilization Decomposition Evaluation of Radiolucent Composite Materials for Use in Medicine
Sochor, M. ; Balík, Karel ; Suchý, Tomáš ; Sedláček, R. ; Sucharda, Zbyněk ; Beneš, J. ; Prokop, J.
This study evaluates the resistance against multiple sterilization processes of radiolucent composite materials for use in medicine as an intraoperative imaging device material. The composite materials under investigation here are composed of carbon fibers, polyphenylene sulfide and polyetheretherketone matrix. The influence of multiple sterilization processes on changes in their mechanical and structural properties are determined. The radiolucency of the proposed composites is verified.
Strength, elasticity, and fracture of composites with pyrolysed matrices based on methylsiloxane resins with optimized ratio of “T” and “D” components
Černý, Martin ; Žaloudková, Margit ; Glogar, Petr ; Sucharda, Zbyněk ; Strachota, Adam ; Chlup, Zdeněk
The investigated composites reinforced with Nextel720 fibers reveal acceptable mechanical properties for applications exposed to temperature up to 1300 °C. Mechanical properties were studied after three-hour exposition at 1300, 1400 and 1500 °C without a protective atmosphere. This temperature treatment increases the mechanical strength up to 15 %.
Particulate composites based on nano HA/TCP particles for bone graft replacements
Suchý, Tomáš ; Rýglová, Šárka ; Balík, Karel ; Sucharda, Zbyněk ; Denk, F.
Particulate composite materials have been developed for applications in the form of an intervertebral cage (for use in spine treatment). The intervertebral cage is composed of a bearing cage made of PEEK and a composite core with the surface contacting the bone surface and ensuring elastic linkage of two vertebral bodies, resulting in good adhesion to the bone. Mechanical analysis of different kinds of particulate composites was performed. The effect of hydroxyapatite and tri-calcium phosphate nanofiller volume fractions on the mechanical properties of particulate composites was investigated.
Biocompatibility optimization of fabric composites by calcium phosphates
Sochor, M. ; Balík, Karel ; Suchý, Tomáš ; Sucharda, Zbyněk
Composite materials based on a polyamide fabric and a polydimethylsiloxane matrix were designed for application in bone surgery. In order to increase the bioactivity, 2, 5, 10, 15, 20 and 25 vol. % of nano/micro hydroxyapatite and tricalcium phosphate were added. The effect of the additives on the mechanical properties was studied. Simultaneously, changes in the inner structure of the composites were investigated by means of image analysis.
Biologicky inspirované nanokompozitní struktury s želatinovými nanovlákny pro regeneraci kostní tkáně
Šupová, Monika ; Hrušková, Daniela ; Sucharda, Zbyněk ; Svobodová, J.
The aims of this work has been the preparation of bioinspired composite materials composed of gelatin matrix, gelatin nanofibers and hydroxyapaptite powder and verifying the influence of nanofibers on the mechanical properties of the composites.
Mechanické chování kompozitů na bázi aramidových vláken a polysiloxanové matrice modifikované bioaktivními nano/mikro částicemi
Sochor, M. ; Balík, Karel ; Suchý, Tomáš ; Sucharda, Zbyněk ; Černý, Martin
This study is aimed at verification of influence of hydroxyapatite/tri-calcium phosphate nano/micro particles additives, commonly used to improve the bioactivity of implants, on mechanical properties of composite material consisting of polyamide fabrics embedded in poly (dimethyl siloxane) matrix potentially applicable in the bone surgery.
Kompozitní materiál na bázi aramidových vláken a polysiloxanové matrice modifikované hydroxyapatitovými částicemi
Sochor, M. ; Balík, Karel ; Suchý, Tomáš ; Sucharda, Zbyněk ; Černý, Martin
This study is aimed at verification of influence of hydroxyapatite nanoparticles additives, commonly used to improve the bioactivity of implants, on mechanical properties (namely ultimate strength in bending and modulus of elasticity in bending) of composite material potentially applicable in the bone surgery.
Biocomposite for hard tissue replacement design with respect to its osseointegration
Sochor, M. ; Balík, Karel ; Bačáková, Lucie ; Vagaská, Barbora ; Suchý, T. ; Černý, Martin ; Sucharda, Zbyněk
The study presented is aimed at development of an advanced porous composite material with suitable mechanical properties for potential use in the bone tissue engineering, hierarchically organized at both micrometer and nanometer scale.

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