Journal of Biomedical Materials Research Part B: Applied Biomaterials
It was previously showed that PLLA nanofiber mesh promoted good endothelial cell proliferation. A new technique was developed to produce nanofibers by air jet spinning inside the tubular shape of vascular prostheses and to characterize this nanofiber mesh. Polymer macromolecule stability was assessed by gel permeation chromatography. Thermal analyses were conducted with differential scanning calorimetry...
Implant failure has been attributed to loosening of an implant from the host bone possibly due to poor osseointegration. One promising strategy for improving osseointegration is to develop a functional implant surface that promotes osteoblast differentiation. In this study, a titanium (Ti) surface was functionalized by an anodic oxidation process and was loaded with recombinant human bone morphogenetic...
The cell adhesion in a multiwalled carbon nanotube‐coated collagen sponge (MWCNT‐coated sponge) was investigated. Immediately after seeding, the cells adhered to the inner surface of the MWCNT‐coated sponge and a significantly larger number of cells were observed there than for a pure collagen sponge used as control. On the MWCNT‐coated sponge, the cells appeared favorable adhesion and spread in the...
Solid freeform fabrication (SFF) enables the fabrication of anatomically shaped porous components required for formation of tissue engineered implants. This article reports on the characterization of a three‐dimensional‐printing method, as a powder‐based SFF technique, to create reproducible porous structures composed of calcium polyphosphate (CPP). CPP powder of 75–150 μm was mixed with 10 wt % polyvinyl...
Fluoropassivation and gelatin coating have been applied to polyethylene terephthalate (PET) vascular prosthesis to combine the advantages of both polytetrafluoroethylene (PTFE) and PET materials, and to eliminate the preclotting procedure. The morphological, chemical, physical, and mechanical properties of such prostheses were investigated and compared with its original model. Fluoropassivation introduced...
Low compliance with medication is the major cause of poor outcome in schizophrenia treatment. While surgically implantable solvent‐cast pellets were produced to improve outcome by increased compliance with medication, this process is laborious and time‐consuming, inhibiting its broader application (Siegel et al., Eur J Pharm Biopharm 2006;64:287–293). In this study, the previous fabrication process...
The aim of this study was to evaluate the effect of primers, luting systems and aging on bond strength to zirconium oxide substrates. Eighteen zirconia discs (19.5 × 4 mm) were polished and treated (n = 3) either with a MDP primer (Md) or with a MDP and VBATDT primer (MV). In the control group (n = 3) no surface chemical treatment was performed. Zirconia specimens were cemented to prepolymerized composite...
A peptide containing a RGD (arginine‐glycine‐aspartic acid) sequence as well as a hydrophobic N‐fluorenyl‐9‐methoxycarbonyl (FMOC) tail was prepared via a standard FMOC solid‐phase peptide synthesis technique. The supramolecular self‐assembly of such peptide through π–π stacking from FMOC tail can transfer the peptide aqueous solution into a three‐dimensional hydrogel. The biocompatibility of the...
In this work, the characterization of a biodegradable bilayer system, used as controlled and combined drug delivery platform, is reported. For this aim, a bilayer system, composed of poly(lactic‐co‐glycolic acid) and poly(3‐hydroxybutyric‐co‐3‐hydroxyvaleric acid), was investigated under physicochemical and functional aspects by evaluating polymer/polymer and polymer/stent material interactions, the...
Local delivery of antibiotics may provide the advantage of reducing the potential side effects associated with their systemic administration. This study assessed, in vitro, the antimicrobial efficacy of tetracycline hydrochloride (TCH) adsorbed onto Bio‐Oss® bone grafts against a range of pathogenic bacteria. Various levels of TCH were adsorbed onto Bio‐Oss® granules by immersing in TCH aqueous solutions...
The following article from Journal of Biomedical Materials Research Part B: Applied Biomaterials, “Push‐out bond strengths of two fiber post types bonded with different dentin bonding agents” by Fulya Toksoy Topcu, Ugur Erdemir, Gunes Sahinkesen, Emre Mumcu, Esra Yildiz, and Ibrahim Uslan, published online on January 20, 2010, in Wiley Online Library (www.wiley onlinelibrary.com <http://www.wiley...
The implantation of controlled drug release devices represents a new strategy in the treatment of neurodegenerative disorders. Sol–gel titania implants filled with valproic acid, have been used for this purpose to treat induced epilepsy in rats. The kinetics of the drug release depend on: (a) porosity, (b) chemical interactions between valproic acid and surface hydroxyl groups of titania, (c) particle...
Polyetheretherketone (PEEK) is a thermoplastic engineering plastic with excellent mechanical properties. In this article, PEEK and its composites filled with ultrahigh‐molecular‐weight polyethylene (UHMWPE) were prepared by vacuum hot‐pressing method. Tribological properties of these materials were investigated by block‐on‐ring friction and wear rig. An alloy (CoCrMo) ring and a ceramic (Si3N4) ring...
Development of porous scaffolds with open surface pore structures is required for tissue engineering to deliver cells into the three‐dimensional spaces in the scaffolds and improve cell distribution. This study demonstrated a new type of funnel‐like chitosan sponge prepared using ice particulates as a template. The funnel‐like chitosan sponges had a hierarchical bilayer porous structure of a surface...
This study aimed to evaluate the effect of the smear layer on the micro‐tensile bond strength when two self‐etching adhesives were used with different techniques. Flat dentine surfaces were prepared using either medium grit diamond burs or tungsten carbide burs. Ten specimens from each prepared surfaces were subjected for smear layer evaluation under SEM. Forty specimens from each of the prepared...
The properties of new calcium phosphate/calcium silicate/bismutite (CPCSBi) cement were compared with those of calcium hydroxide (CH) and Dycal cements in dental pulp‐capping applications. CPCSBi is composed of hydroxyapatite, tetracalcium phosphate, bismutite, and calcium silicate, which was analyzed by SEM, FTIR, and XRD. The results of ion release from CPCSBi showed that the concentrations of Bi...
clinical application of tissue engineered palatal mucosa is hampered by unavailability of suitable oral keratinocytes as seeding cells. The aim of this study is to fabricate a tissue engineered palatal mucosa equivalent from the oral keratinocytes which cultured from cryopreserved lip mucosa tissues. Abundant lip mucosa tissues during cheilorrhaphy were firstly cryopreserved in liquid nitrogen for...
Thiol groups were introduced to unfractionated heparin (UFH) and end‐aminated heparin (HepNH2) by reaction with 2‐iminothiolane under conditions favoring selective modification of terminal over primary amines. End‐thiolated heparin retained anticoagulant activity as shown by the activated partial thromboplastin time (aPTT) and anti‐Factor Xa (anti‐FXa) assays. Thiolated heparins were linked to pyridyl‐disulfide...
Micropatterns were fabricated in nanofibrous poly‐L‐lactic acid (PLLA) films by laser micromachining and the resulting scaffolds were characterized with respect to architecture, thermal, mechanical, and mass transport properties. Also, human neural stem cells were successfully cultured in these micropatterned nanofibrous scaffolds (MNFSs). The scaffolds were incorporated in high‐density well plates...
Human Salivary Derived Esterases (HSDE) are part of the salivary group of enzymes which show strong degradative activity toward the breakdown of one of the most common monomers used in dental composites and adhesives, 2,2‐[4(2‐hydroxy 3‐methacryloxypropoxy)‐phenyl] propane (Bis‐GMA), to form the degradation product 2,2‐bis [4 (2,3‐hydroxy‐propoxy)phenyl] propane (Bis‐HPPP). This study was aimed to...