Results: 103

Quantitative evaluation of the regenerated dura mater in a decompressive skull trepanation model in rats

Int. j. morphol; 39 (6), 2021
SUMMARY: Regeneration of the dura mater following duraplasty using a collagen film, a chitosan film, or a combination of both with gelatin, was studied in a craniotomy and penetrating brain injury model in rats. Collagen autofluorescence in the regenerated dura mater was evaluated using confocal microsco...

Associação da quitosana à terapia fotodinâmica para controle de Candida albicans: estudo em culturas planctônicas, biofilmes e células persistentes

A terapia fotodinâmica (TFD) vem se mostrando como um método eficaz no controle de micro-organismos patogênicos, sendo investigada para o tratamento de diversas doenças infecciosas, como a candidose bucal. Recentemente, alguns agentes potencializadores dessa terapia têm sido estudados, incluindo a Q...

Carboxymethyl chitosan hydrogel formulations enhance the healing process in experimental partial-thickness (second-degree) burn wound healing

Acta cir. bras; 36 (3), 2021
ABSTRACT Purpose This study aimed to elaborate a hydrogel constituted by carboxymethyl chitosan (CMC), hyaluronic acid (HA) and silver (Ag) and to evaluate its healing effect on partial-thickness burn wounds experimentally induced in rats. Methods CMC was obtained by chitosan reacting with monochloroac...

Antimicrobial Activity of Colloidal Selenium Nanoparticles in Chitosan Solution against Streptococcus mutans, Lactobacillus acidophilus, and Candida albicans

ABSTRACT Objective: To investigate the antimicrobial activity of colloidal selenium nanoparticles in chitosan solution (Cts-Se-NPs) against Streptococcus mutans, Lactobacillus acidophilus, and Candida albicans. Material and Methods: Cts-Se-NPs solution was prepared using a simple chemical reduction met...

In vitro evaluation of hydroxyapatite, chitosan, and carbon nanotube composite biomaterial to support bone healing

Hydroxyapatite, chitosan, and carbon nanotube composite biomaterial were developed to improve bone healing. Previous studies suggested that a combination of biomaterials and mesenchymal stem cells (MSCs) can potentially help promote bone regeneration. In the present study, we first developed hydroxyapati...

Synthesis of a chitosan nanoparticle suspension and its protective effects against enamel demineralization after an in vitro cariogenic challenge

J. appl. oral sci; 29 (), 2021
Abstract Objective Our study aims to synthesize, characterize, and determine the effects of a ChNPs suspension on human enamel after cariogenic challenge via pH-cycling. Methodology ChNPs were synthesized by ion gelation and characterized by Transmission Electron Microscopy (TEM) and Dynamic Light Sc...

Optimized Chitosan-Coated Gliadin Nanoparticles Improved the Hesperidin Cytotoxicity over Tumor Cells

Braz. arch. biol. technol; 64 (spe), 2021
Abstract Hesperidin is a natural compound which is found in citric fruits and presents antitumor and antimicrobial activities. However, the in vivo efficacy of Hesperidin is reduced due to its low oral bioavailability. Protein-based nanoparticles have been applied to improve biological parameters of drug...

Effect of chitosan treatment on shear bond strength of composite to deep dentin using self-etch and total-etch adhesive systems

Braz. dent. sci; 24 (2), 2021
Objective: To assess the shear bond strength (SBS) of resin composite to deep dentin, using 1 and 2.5% chitosan pretreatment as well as different adhesive systems. Material and Methods: 80 human maxillary molars were randomly divided to eight groups according to the type of adhesive s...

Engenharia tecidual e biotecnologia aplicadas no desenvolvimento de scaffolds multifuncionais para estimular o reparo do complexo dentina-polpa

Este trabalho teve por objetivo empregar diferentes técnicas de engenharia tecidual e biotecnologia para o desenvolvimento de scaffolds biomiméticos em associação com moléculas com reconhecido potencial osteogênico, visando seu emprego em estratégias cell-homing para reparo do complexo dentina-pol...

Biocompatibilidade do gel de quitosana associado ao glicerol fosfato na reparação de defeitos ósseos induzidos experimentalmente no rádio de coelhos (Oryctolagus cuniculus)

A engenharia de tecidos caracteriza-se como ciência interdisciplinar, a qual vem desenvolvendo biomateriais para a regeneração do tecido ósseo no âmbito das medicinas humana e veterinária. O objetivo desta pesquisa foi avaliar a regeneração óssea obtida da aplicação do hidrogel de quitosana as...