Preparation, modification, and characterization of acrylic cements

Basgorenay, B
Ulubayram, K
Serbetci, K
Onurhan, E
Hasırcı, Nesrin
Acrylic cements with different compositions were prepared by mixing the solid part (composed of poly(methyl methacrylate), PMMA, and benzoyl peroxide, BPO) and the liquid part (composed of methyl methacrylate, MMA, and N,N-dimethyl-p-toluidine, DMPT), modified by addition of hydroxyapatite (HA) and ammonium nitrate (AN) and characterized by measuring thermal and mechanical properties. Three sets of samples were prepared. For B-group, the total amount of solid including HA was constant but the PMMA to HA ratio was varied. For C-group, polymer/monomer ratio was constant and varying amounts of HA was added. For D-group, polymer/monomer ratio was kept constant and AN was added in varying amounts. Effects of these composition changes on the properties of the cement such as setting time, curing temperature, tensile and compression strength, and deformation were examined. For B-group samples, no linear change was observed in thermal (curing temperatures were all quite high) and mechanical (between 27 and 19 MPa for tensile, and 98 and 116 MPa for compression strength) properties upon change of HA content with change in solid/liquid ratio. For C and D-group samples, a continuous decrease in curing temperature from 114 to 101 degrees C and from 94 to 73 degrees C was observed upon increasing HA and AN contents, respectively. Also, a linear relation was observed in compression strength (from 98 to 111 MPa) and in tensile strength (from 27 to 21 MPa) upon HA addition, and in the compression strength (from 103 to 85 MPa) and in the tensile strength (from 22 to 17 MPa) with NA addition. (c) 2006 Wiley Periodicals, Inc.


Modification of Acrylic Bone Cements with Oxygen Plasma and Additives
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Acrylic bone cements which are commonly used for the fixation of orthopedic prostheses, were prepared at different formulations, by using either ground poly(methyl methacrylate) (PMMA) particles or homogeneously synthesized PMMA microspheres with application of plasma and addition of various ingredients in order to improve mechanical and thermal properties. PMMA powders having three different particle size (ground and sieved particles with 0-50 mu m (BC1 group, average particle size: 21 mu m) and 50-150 mu ...
Preparation of porous Ca-10(PO4)(6)(OH)(2) and beta-Ca-3(PO4)(2) bioceramics
Engin, NO; Tas, AC (2000-07-01)
Submicrometer-sized, pure calcium hydroxyapatite (HA, (Ca-10(PO4)(6)(OH)(2))) and eta-tricalcium phosphate (beta-TCP, Ca-3(PO4)(2)) bioceramic powders, that have been synthesized via chemical precipitation techniques, were used in the preparation of aqueous slurries that contained methyl cellulose to manufacture porous (70%-95% porosity) HA or beta-TCP ceramics. The pore sizes in HA bioceramics of this study were 200-400 mu m, whereas those of beta-TCP bioceramics were 100-300 mu m. The pore morphology and ...
Effects of Ingredients on Thermal and Mechanical Properties of Acrylic Bone Cements
Endoğan Tanır, Tuğba; Hasırcı, Nesrin (2009-09-15)
There is a very delicate relation between the amounts of all the ingredients present in the cement composition and the properties of the product. In this study, homogeneous poly(methyl methacrylate) (PMMA) microspheres were prepared by suspension polymerization technique, and used in cement formulations. Various acrylic cements with different compositions were prepared by using PMMA microspheres, methyl methacrylate (MMA) monomer, radiopaque agent of barium sulfate (BaSO4), inorganic particles of hydroxyapa...
Synthesis of biomimetic Ca-hydroxyapatite powders at 37 degrees C in synthetic body fluids
Tas, AC (2000-07-01)
An important inorganic phase for synthetic bone applications, calcium hydroxyapatite (HA, Ca-10(PO4)(6)(OH)(2)), was prepared as a nano-sized (similar to 50 nm), homogeneous and high-purity ceramic powder from calcium nitrate tetrahydrate and diammonium hydrogen phosphate salts dissolved in modified synthetic body fluid (SBF) solutions at 37 degrees C and pH of 7.4 using a novel chemical precipitation technique. The synthesized precursors were found to easily reach a phase purity >99% after 6 h of calcinati...
Thermal and mechanical properties of hydroxyapatite impregnated acrylic bone cements
Serbetci, K; Korkusuz, F; Hasırcı, Nesrin (2004-04-01)
Improvement of mechanical, thermal and biological properties of acrylic-based bone cements by adding various chemicals is a novel research area. Among these additives, hydroxyapatite (HA) is proven to be a biocompatible and osteoconductive material and it strongly integrates with bone. In this study, HA-containing acrylic bone cements were prepared and thermal and mechanical properties of the resultant cements were examined.
Citation Formats
B. Basgorenay, K. Ulubayram, K. Serbetci, E. Onurhan, and N. Hasırcı, “Preparation, modification, and characterization of acrylic cements,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 3631–3637, 2006, Accessed: 00, 2020. [Online]. Available: