Effects of hydroxyapatite on PMMA-HAp cement for biomedical applications

Autor:	Tarcísio Passos Ribeiro de Campos, M.T.P. Aguilar, M.I. Yoshida, C.J. Montaño, Celso V. Lima, Natanael Geraldo Silva Almeida, B.R.S. Lemos
Rok vydání:	2020
Předmět:	Thermogravimetric analysis Materials science Compressive Strength 0206 medical engineering Biomedical Engineering Biocompatible Materials 02 engineering and technology Thermal treatment law.invention Biomaterials Differential scanning calorimetry law Tensile Strength Materials Testing 0202 electrical engineering electronic engineering information engineering Humans Polymethyl Methacrylate Calcination Composite material Cement Bone Cements General Medicine Bone cement 020601 biomedical engineering Vitrification Biomechanical Phenomena Compressive strength Durapatite Bone Substitutes Thermogravimetry 020201 artificial intelligence & image processing Hydroxyapatites Stress Mechanical Glass transition Porosity
Zdroj:	Bio-medical materials and engineering. 31(3)
ISSN:	1878-3619
Popis:	Objective The main goal of this study was to examine the influence of hydroxyapatite (HAp) macroaggreate concentrations on thermal and mechanical properties of radioactive bone cement and to study the relation of glass transition Tg with its mechanical properties. Methods The bone cement as (1-x)PMMA-xHAp binary system was prepared in six [x] distinct concentration parameters of 0.0 up to 0.5. The HAp was synthesized using a solgel procedure following calcination by thermal treatment. The composite was prepared in cold based (non-radioactive) mixing polymethyl methacrylate (PMMA) and HAp. Differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and mechanical compressive strength (CS) were used to measure the thermal and mechanical properties. Results The DSC and TGA thermal profiles in function to concentration parameter [x] were presented. The CS lies in a range of 3.71-7.37 MPa and the glass transition temperature Tg = 126.27 °C. There was a direct relationship between the PMMA-HAp thermoplastic properties with mechanical and thermal properties in function of HAp concentrations. Conclusion The specific PMMA-HAp composite, with a concentration ratio of 1:1 and HAp thermal treatment at the Tg, provides a material with a compression strength of 7.37 MPa and a suitable amount of porous similar to a trabecular bone, possible to apply in bone cement implants, regardless of whether they are radioactive or not.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5380a399e3e922cb775e1884be05a627 https://pubmed.ncbi.nlm.nih.gov/32568169 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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