The advancement of 3D printing technology offers a sophisticated solution for tissue engineering and regenerative medicine. Several printable hydrogels have been developed with specific designs certain tissues. However, there are few effective 3D-printed cartilage due to challenges the hydrogel printability redifferentiation capacity articular chondrocytes on hydrogel. This research study combined PEG–PLA copolymer gelatin develop scaffolds regeneration. Different samples were prepared...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructures of Oxyethylene/Oxybutylene Diblock Copolymers in Their Solid and Liquid StatesYung-Wei Yang, Siriporn Tanodekaew, Shao-Min Mai, Colin Booth, Anthony J. Ryan, Wim Bras, Kyriakos VirasCite this: Macromolecules 1995, 28, 18, 6029–6041Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August...

The photocurable polylactide (PLA) and hydroxyapatite (HA) composites were prepared for solid free-form fabrication of three-dimensional scaffolds by stereolithography (SLA). influence varying pore feature HA amount PLA/HA on cell growth differentiation was evaluated with MC3T3-E1 pre-osteoblasts. Morphology adherent cells examined SEM. Alamar Blue assay employed to observe proliferation cytotoxicity scaffold. Alkaline phosphatase activity (ALP) calcium content in cell-cultured samples also...

Abstract Diblock copolymers of ethylene oxide and DL ‐lactide (E m L n copolymers) were prepared by sequential anionic polymerisation characterised gel permeation chromatography (GPC) 13 C NMR. Their association surface properties in aqueous solution studied tension dynamic static light scattering. Comparison the critical micelle concentrations (cmc) numbers ( N w ) E with published values for oxyethylene/oxybutylene B indicated a slightly lower hydrophobicity lactide unit: i.e. ≃ 0.75B. The...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicellization and gelation of block-copoly(oxyethylene/oxybutylene) in aqueous solutionSiriporn Tanodekaew, Nan Jie Deng, Sibyl Smith, Yung Wei Yang, David Attwood, Colin BoothCite this: J. Phys. Chem. 1993, 97, 45, 11847–11852Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.1021/j100147a044https://doi.org/10.1021/j100147a044research-articleACS...

Abstract The micellization and gelation properties of oxyethylene/oxybutylene diblock copolymers E 40 B 10 41 8 in aqueous K 2 SO 4 solutions were investigated. thermodynamic hydrodynamic volumes the micelles salt various concentrations up to 0.4 mol dm −3 determined by static dynamic light scattering, respectively. related changes behavior concentrated micellar explained as (excluded) volume effects. measured moderately solution used successfully predict critical gel solutions. ©1995 John...

This study prepared low-toxicity, elemental-releasing resin-modified glass ionomer cements (RMGICs). The effect of 2-hydroxyethyl methacrylate (HEMA, 0 or 5 wt%) and Sr/F-bioactive nanoparticles (Sr/F-BGNPs, 10 on chemical/mechanical properties cytotoxicity were examined. Commercial RMGIC (Vitrebond, VB) calcium silicate cement (Theracal LC, TC) used as comparisons. Adding HEMA increasing Sr/F-BGNPs concentration decreased monomer conversion enhanced elemental release but without significant...

Abstract The thermally‐reversible gelation of aqueous solutions diblock copolymers ethylene oxide (E) and D , L ‐lactide (L), E 42 12 38 16 39 20 41 26 78 14 77 has been studied using temperature measurements, polarised light microscopy NMR spectroscopy. showed a high gel‐sol boundary but no low boundary. Polarised that the gel phase was isotropic, dependence sol‐gel on concentration suggested micelles were prolate ellipsoidal, rather then spherical. spectroscopy below ca. 60°C, block in...

This study aimed to develop resin coatings containing monocalcium phosphate monohydrate (MCPM), Sr/F-doped bioactive glass (Sr/F-BAGs), and pre-reacted ionomer fillers (SPG) that enhance ion release without detrimentally affecting the mechanical properties of GIC. The objective this was evaluate degree monomer conversion (DC), biaxial flexural strength, surface microhardness, GICs coated with experimental coating materials compared a commercial product (EQUIA Coat, EC). Four 10–20 wt% MCPM...

Abstract Xylan was first modified with maleic anhydride (MA) to obtain xylan‐MA. The derivative then blended polyvinyl alcohol (PVA) generate xylan‐MA/PVA hydrogel. Xylan‐MA prepared by reacting xylan MA under an acidic condition. A ring opening of occurred, yielding ester linkages between and MA, as verified 13 C‐NMR FTIR. effects reaction temperature weight ratio on esterification were examined. Thermal stability derivatives compared that pure using TGA. blends xylan‐MA PVA became...

The aim of this study was to prepare experimental resin-modified glass ionomer cements (RMGICs) containing low levels hydroxyethyl methacrylate (HEMA) for pulp protection. Liquid and powder phases the RMGICs were polyacid functionalized with groups spherical pre-reacted fillers (SPG). Two types liquid phase 0 wt. % HEMA (CM liquid) or 5 (CMH formulated. prepared by mixing SPG CM (F1) CMH (F2). Rheological properties examined using a strain-controlled rheometer (n = 5). Vickers microhardness...

The aim of this study was to prepare RMGICs for pulp protection that contain polyacids functionalized with methacrylate groups (CMs) enable light-activated polymerization without the need toxic 2-hydroxyethyl (HEMA) monomers. effects using CM liquids 0 or 5 wt% HEMA on physical/mechanical properties and cytotoxicity experimental were assessed. Spherical pre-reacted glass fillers (SPG) used as powder phase. prepared by mixing SPG liquid (0 HEMA, F1) CMH (5 F2). Commercial materials...

Three triblock copolymers of ethylene oxide and ε-caprolactone, nominally CL2E90CL2, CL4E90CL4 CL6E90CL6 have been prepared characterised. The micellar surface properties in aqueous solution the with CL-block lengths four six were investigated as a function temperature concentration using tension static dynamic light scattering techniques. Reversible gelation on cooling solutions was observed at critical concentrations temperatures ranging from 130 g kg–1 25 °C to 300 kg–1, 80 °C.

Abstract The merging of stereolithography (SLA) technology to the medical field certainly benefits manufacturing parts, especially those patient‐specific for clinical use. This technique, however, has hardly been exploited medically due a limited number biodegradable resins SLA processing. To extend application in biomedical field, photocurable oligolactide were developed and examined biodegradation biocompatibility. degradation was studied by monitoring changes weight loss, thermal...

Porous oligolactide-hydroxyapatite composite scaffolds were obtained by stereolithographic fabrication. Gentamicin was then coated on the afterwards, to achieve antimicrobial delivery ability treat bone infection. The examined stereomicroscope, SEM, and μCT-scan showed a well-ordered pore structure with uniform distribution interconnectivity. physical mechanical properties of investigated. It shown that not only porosity but also scaffold played critical role in governing strength scaffolds....

The fabrication of hydroxyapatite scaffolds for bone tissue engineering applications by using lithography-based additive manufacturing techniques has been introduced due to the abilities control porous structures with suitable resolutions. In this research, use cellular structures, which are processed machine, as a scaffold was investigated. utilization digital light processing system machine in laboratory scale performed order fabricate scaffold, biocompatibilities were eventually evaluated...

In this paper, we report on the enhanced strength of glass ionomer cement (GIC) by using process pre acid-base reaction and spray drying in preparation. The was induced prior mixing powder with poly(alkenoic acid). weight ratios to acid) were varied investigate extent glass. effect which produced spherical particles also studied discussed. results show that adding 2%-wt liquid pre-reacted step improved strength. GICs prepared a mixture both irregular powders at 60:40 exhibited highest...

Abstract The dressing prepared from GTMAC modified chitin–PAA was introduced with the aim of facilitating wound healing, particularly those effectively absorbing exudates, maintaining a moist environment and controlling bacterial proliferation. Chitin chemically acrylic acid to encourage healing environment. highly water‐absorbable resulting product (chitin–PAA) further reacted glycidyltrimethylammonium chloride (GTMAC) impart antibacterial activities. final product, chitin–PAA–GTMAC...