Hydroxyapatite
Mostrando 25-36 de 654 artigos, teses e dissertações.
-
25. Sulfonated poly(ether ether ketone)/hydroxyapatite membrane as biomaterials: process evaluation
Abstract Poly(ether ether ketone) (PEEK) has excellent properties, such as high biocompatibility and an elastic modulus similar to bone, which makes it a suitable biomaterial. When modified with sulfuric acid (H2SO4) and hydroxyapatite (HA), its workability and bioactivity is enhanced, and this makes it of great importance in medicine. This study investigat
Polímeros. Publicado em: 18/03/2019
-
26. Influence of the geometry of nanostructured hydroxyapatite and alginate composites in the initial phase of bone repair
Abstract Purpose: To analyze, histomorphologically, the influence of the geometry of nanostructured hydroxyapatite and alginate (HAn/Alg) composites in the initial phase of the bone repair. Methods: Fifteen rats were distributed to three groups: MiHA - bone defect filled with HAn/Alg microspheres; GrHA - bone defect filled with HAn/Alg granules; and DV - e
Acta Cir. Bras.. Publicado em: 28/02/2019
-
27. RADIOACTIVE CEMENT OF PMMA AND HAP-Sm-153, Ho-166, OR RE-188 FOR BONE METASTASIS TREATMENT
RESUMO Polymethylmetacrylte (PMMA) é um composto utilizado na indústria e desde os anos 80's também tem sido empregado nas áreas odontológica e biomédica como constituinte de cimentos ósseos. A hydroxyapatite (HAp) é uma biocerâmica produzida naturalmente nos ossos. Esses dois componentes são constituintes fundamentais no preparo de cimentos ósseo
Acta ortop. bras.. Publicado em: 2019-02
-
28. Obtaining hydroxyapatite with different precursors for application as a biomaterial
Resumo A hidroxiapatita (HAp) é um biomaterial cerâmico com ampla aplicação na regeneração óssea. Pode ser obtida por diferentes rotas e diferentes precursores. Neste estudo, a síntese da HAp foi realizada por precipitação e tratamento térmico subsequente utilizando diferentes precursores de cálcio: hidróxido de cálcio de origem sintética e ó
Cerâmica. Publicado em: 2019-01
-
29. Desenvolvimento de biomaterial composto por hidroxiapatita e clorexidina para aplicação na cavidade oral
Resumo A hidroxiapatita (HAp) está presente no organismo humano nos tecidos ósseos e dentários, em que do total da massa de cada tecido 30 a 70% correspondem a HAp, podendo ser aplicada como revestimentos de próteses ou até substituição de pequenas partes ósseas. Assim, o objetivo foi sintetizar HAp por precipitação, incorporar clorexidina (CHX) e
Cerâmica. Publicado em: 2019-01
-
30. Comparative study between natural and synthetic Hydroxyapatite: structural, morphological and bioactivity properties
ABSTRACT In this work, a study of hydroxyapatite (HAp) powders obtained using both, porcine bones and chemical precursors was carried put. In the case of HAp obtained by means of porcine bones, physical processes as cooking, washing and milling were developed, for removing the organic material from the bones; after that, the powders were submitted to a therm
Matéria (Rio J.). Publicado em: 06/12/2018
-
31. Effects of in-office bleaching agent combined with different desensitizing agents on enamel
Abstract Objective: To analyze color change, microhardness and chemical composition of enamel bleached with in-office bleaching agent with different desensitizing application protocols. Materials and Methods: One hundred and seventeen polished anterior human enamel surfaces were obtained and randomly divided into nine groups (n = 13). After recording initi
J. Appl. Oral Sci.. Publicado em: 08/11/2018
-
32. BONEFILL ® block as alternative for bone substitute: a toxicological evaluation
ABSTRACT Bone substitutes based on hydroxyapatite (HA) and Bonefill® (BO - inorganic bovine bone) associated with poly(lactic-co-glycolic acid) (PLGA) (HA/PLGA and BO/PLGA) were evaluated concerning cytotoxicity, genotoxicity and mutagenicity as potential candidates for bone repair. The materials were developed and provided by Bionnovation Biomedical Produc
Braz. J. Pharm. Sci.. Publicado em: 26/07/2018
-
33. Fabricación de recubrimientos compuestos de Bioglass®/poli(ɛ-capro-lactona) obtenidos por co-deposición electroforética sobre acero inoxidable
ABSTRACT In this work two kinds of "soft coatings" were obtained by co-electrophoretic deposition technique (co-EPD). In all cases a bioglass was used as inorganic phase, and a commercial poly(ɛ-caprolactone), (PCLC), and an anionic synthesized PCL modified with maleic anhydride (PCLS) were used as organic phase. To ensure an adequate coating over the metal
Matéria (Rio J.). Publicado em: 19/07/2018
-
34. Obtención de compuesto de titanio con gradiente de porosidad mediante técnica pulvimetalúrgica
ABSTRACT Within the study of biomaterials for implantological use titanium is among the most widely employed metals due to its excellent corrosion and mechanical resistance. In spite of the advances made, there are some issues remaining with the value of the elastic moduli of the titanium (110GPa) in comparison with the elastic moduli of the cortical bone (2
Matéria (Rio J.). Publicado em: 19/07/2018
-
35. A comparison of different bone graft materials in peri-implant guided bone regeneration
Abstract The aim of this study was to compare the effects of hydroxyapatite (HA), deproteinized bovine bone (DPB), human-derived allogenic bone (HALG), and calcium sulfate (CAP) graft biomaterials used with titanium barriers for bone augmentation to treat peri-implant defects in rat calvarium treated by guided bone regeneration (GBR). Thirty-two female Sprag
Braz. oral res.. Publicado em: 10/07/2018
-
36. In Situ Formation of Hydroxyapatite During Powder Metallurgy Preparation of Porous Ti/HA Nano Composite: A Candidate for Dental Implants
Porous Ti/HA nano-composite was prepared for implant fixtures and in situ formation of Hydroxyapatite. At first, Ca(OH)2 nanoparticles were synthesized by precipitation. Raw materials included Ca(NO3)2.4H2O, NaOH, a mixture of deionized water and ethanol. Synthesized Ca(OH)2 nano powder was mixed with (NH4)2HPO4 and the mixture was calcined at 700 ºC for 30
Mat. Res.. Publicado em: 28/05/2018