Qaisar Nawaz

3D-printed polycaprolactone-bioactive glass composite scaffolds for bone tissue engineering: the effect of filler content on different surface modifications

Minjoo Kim, Qaisar Nawaz, Bastian Hartmann, Giles Michael Cheers et autres

Composite material technology and advanced surface modifications are the two most substantial components in designing an effective bone scaffold. In this study, the extrusion of polycaprolactone (PCL)-45S5 Bioglass® (BG) composite filaments using a dry-mix hot-melt extrusion method was investigated. PCL-45S5 BG (PCL-BG) …

de, ch (code pays fourni par la source)

Star-shaped PCL nanoparticles combining quercetin release and α-amylase surface functionalization enable AFM-quantified removal of biofilms of clinical Staphylococcus aureus isolates

Giovanni Lo Bello, Pier Francesco Ferrari, Elisa Schinca, Giacomo Damonte et autres

Healthcare-associated infections (HAIs) driven by multi-drug-resistant biofilms remain a critical challenge in clinical settings. The emergence of antibiotic-resistant strains has intensified the need for innovative antimicrobial strategies, particularly for effective surface treatments in clinical environments. This study presents a novel bifunctional nanoplatform …

it, de (code pays fourni par la source)

Synthesis of composite chitosan/Ge-containing mesoporous bioactive glass nanoparticle coatings on titanium surfaces by electrophoretic deposition

Guadalupe Ureiro‐Cueto, Qaisar Nawaz, Rezvan Azari, Aldo R. Boccaccini

mx, de (code pays fourni par la source)

ADA-GEL composite hydrogel films incorporating mesoporous bioactive glass nanoparticles and silver-doped bioactive glass nanoparticles for biomedical applications

Asimenia Lekidou, Thomas Papatasos, Qaisar Nawaz, Xanthippi Chatzistavrou et autres

Hydrogels made from natural polymers are widely used in biomedical engineering as they resemble the extracellular matrix. Alginate dialdehyde-gelatin (ADA-GEL) hydrogels are notable for their biocompatibility, biodegradability, and adjustable crosslinking. However, their limited mechanical strength and bioactivity present significant challenges for use …

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Antibacterial and anti-inflammatory chitosan films incorporating recombinant collagen functionalized mesoporous bioactive glass nanoparticles for skin wound healing

Sreelakshmi K. Narayanan, Svetlana; id_orcid 0000-0001-6621-7649 Zolotovskaya, Bruno Silvester Lopes, Qaisar Nawaz et autres

Chitosan (CH) is a well-known biocompatible, antibacterial biopolymer with distinct merits (e.g., infection control) for wound healing. However, like many other biopolymers, its bioactivity and mechanical stability are limited and need to be improved to promote the wound healing process. In this …

in, gb, de, cn (code pays fourni par la source)

Biofunctional coatings for 3D-printed bone scaffolds: A comparative study on polydopamine-assisted bioactive ceramic coatings

MinJoo Kim, Qaisar Nawaz, Bastian Hartmann, Pedro Henrique da Rosa Braun et autres

Polycaprolactone (PCL) is one of the most intensively studied biomaterials for three-dimensional (3D) printing in bone tissue engineering. However, without modification, it lacks bioactivity and osteogenic properties to function as a bone scaffold alone. Here, a facile single-step co -deposition to graft …

de, ch (code pays fourni par la source)

Effects of S53P4 bioactive glass coatings on double-size laser-textured zirconia substrates: cell adhesion and mineralisation behaviour

L.M. Pereira, Qaisar Nawaz, N.M. Ferreira, António B. Pereira et autres

Commercial zirconia dental implants are usually surface-treated by well-established methods to improve osseointegration, traditionally relying on grit blasting and acid-etching procedures. However, laser surface texturing (LST) has recently emerged as an eco-friendly alternative to treat zirconia implants, offering the capability to create …

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Powder Aging Effects on Mechanical and Fire Properties of a Flame Retardant PA12 in Laser Powder Bed Fusion

Paul Roumeliotis, Samuel Schlicht, Rainer Detsch, Qaisar Nawaz et autres

Flame retardant polymer based powders for laser based powder bed fusion (PBF-LB/P) are currently not reusable. This leads to crucial economic and environmental disadvantages of the process, when using flame retardant powder. In this study, we demonstrate the processability and emerging part …

de (code pays fourni par la source)

Low‐temperature sintered boron‐doped S53P4 bioactive glass scaffolds fabricated by robocasting

Ertugrul Varlik, Lenka Drotárová, Abel W. Ourgessa, Martina Vitázková et autres

Abstract This study investigates boron‐doped S53P4 bioactive glass (BG) scaffolds fabricated via robocasting in the context of bone regeneration strategies by comparing their mechanical performance and bioactive behavior to undoped S53P4 BG scaffolds. Three‐dimensional scaffolds with grid‐like macro architectures were fabricated using …

de, sk, cz, gb (code pays fourni par la source)

FABRICATION OF RADIOPAQUE BIOACTIVE GLASS COATINGS WITH ENHANCED ANTIBACTERIAL ACTIVITY BY APS THERMAL SPRAY

G.A. Clavijo-Mejía, Martin Michálek, Qaisar Nawaz, Laurène Youssef et autres

Bioactive glass 45S5 (composition: 45SiO2, 24.5CaO, 24.5Na2O, 6P2O5 wt. %) has shown significant potential in biomedical applications due to its extensive research and promising clinical outcomes. Its versatile glass structure enables the development of novel bioactive glasses by incorporating additional ions into …

sk, de, fr, gb (code pays fourni par la source)

Bioactive glass (BG) particle shape affects the mechanical and biological properties of PLA/BG scaffolds for bone regeneration

Ertugrul Varlik, Lucille Viviant, Fatih Kurtuldu, Qaisar Nawaz et autres

• Spheroidized glass microspheres improved PLA filament tensile strength. • 3D-printed scaffolds with microspheres show higher compressive strength at 30% strain. • MG-63 cells show highest viability on scaffolds containing microspheres after seven days of incubation. • Glass microspheres are uniformly distributed …

de, sk, fr (code pays fourni par la source)

Silane-based particle-matrix coupling in intumescent flame retardant systems for PBF-LB/P

Paul Roumeliotis, Samuel Schlicht, Rainer Detsch, Qaisar Nawaz et autres

Flame retardancy for samples manufactured in laser-based powder bed fusion (PBF-LB/P) is one of the major concerns to overcome for the application of the materials in environments with high safety standards. However, the trade-off between flame retardant and mechanical properties remains challenging. …

de (code pays fourni par la source)