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Humberto Fernández-Morán (1924-1999) a pioneer in electron ultra-cryomicroscopy

Romero-Reverón, Rafael.
Int. j. morphol; 39 (6), 2021
SUMMARY: Humberto Fernández-Morán (1924-1999) a Venezuelan physician and biophysicist research, who developed the diamond knife. Furthermore he focused on improving the mechanical performance, accuracy and reliability of mocrotomes and ultramicrotomes which significantly advanced the development of ele...
Microscopía por Crioelectrón/historia, Médicos/historia, Instrumentos Quirúrgicos/historia, Diamante, Venezuela
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Effect of dlc films with and without silver nanoparticles deposited on titanium alloy

Ankha, Milagros del Valle El Abras; Silva, Alecsandro de Moura; Prado, Renata Falchete do; Camalionte, Maiara Penteado; Vasconcellos, Luana Marotta Reis de; Radi, Polyana Alves; Silva Sobrinho, Argemiro Soares da; Vieira, Lucia; Carvalho, Yasmin Rodarte.
Braz. dent. j; 30 (6), 2019
Abstract Diamond-like carbon (DLC) film is a biocompatible hard coating material that can prevent the leaching of metal ions. This study evaluates the structural characteristics of DLC, with and without silver nanoparticles, deposited by plasma (PECVD) on titanium alloy (Ti-6Al-4V) and bone formation in ...
Aleaciones, Carbono, Diamante, Ensayo de Materiales, Nanopartículas del Metal, Plata, Propiedades de Superficie, Titanio
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A Novel Porous Diamond - Titanium Biomaterial: Structure, Microstructure, Physico-Mechanical Properties and Biocompatibility

GUIMARÃES, ZULMIRA A S; DAMATTA, RENATO A; GUIMARÃES, RENAN S; FILGUEIRA, MARCELLO.
An. acad. bras. ciênc; 89 (4), 2017
ABSTRACT With the aim of introducing permanent prostheses with main properties equivalent to cortical human bone, Ti-diamond composites were processed through powder metallurgy. Grade 1 titanium and mixtures of Ti powder with 2%, 5% and 10 wt% diamond were compacted at 100MPa, and then sintered at 1250°...
Materiales Biocompatibles/análisis, Chlorocebus aethiops, Diamante/análisis, Ensayo de Materiales/métodos, Porosidad, Propiedades de Superficie, Resistencia a la Tracción, Titanio/análisis, Células Vero
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The effect of standardised implantoplasty protocol on titanium surface roughness: an in-vitro study

Tawse-Smith, Andrew; Kota, Akash; Jayaweera, Yathen; Vuuren, Wendy Jansen van; Ma, Sunyoung.
Braz. oral res. (Online); 30 (1), 2016
Abstract: To analyse the changes of surface characteristics of machined and moderately roughened titanium disks following a standardised implantoplasty protocol. Forty titanium discs (machined: n = 20; moderately roughened: n = 20) were instrumented with one half of each disc maintained as the control (n...
Pulido Dental/métodos, Diamante/química, Ensayo de Materiales, Microscopía Confocal, Microscopía Electrónica de Rastreo, Valores de Referencia, Espectrometría por Rayos X, Estadísticas no Paramétricas, Propiedades de Superficie, Titanio/química
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Efficiency of different protocols for enamel clean-up after bracket debonding: an in vitro study

Sigilião, Lara Carvalho Freitas; Marquezan, Mariana; Elias, Carlos Nelson; Ruellas, Antônio Carlos; Sant'Anna, Eduardo Franzotti.
Dental press j. orthod. (Impr.); 20 (5), 2015
Objective: This study aimed to assess the efficiency of six protocols for cleaning-up tooth enamel after bracket debonding.Methods:A total of 60 premolars were divided into six groups, according to the tools used for clean-up: 12-blade bur at low speed (G12L), 12-blade bur at high speed (G12H), 30-blade ...
Diente Premolar/anatomía & histología, Desconsolidación Dental/instrumentación, Desconsolidación Dental/métodos, Esmalte Dental/lesiones, Diamante, Microscopía Electrónica de Rastreo, Soportes Ortodóncicos, Resinas Sintéticas, Propiedades de Superficie, Factores de Tiempo, Compuestos de Tungsteno
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Resistência de união e microinfiltração em restaurações de resina composta em função do instrumento de corte

Lima, Luciana Monti; Motisuki, Cristiane; Lopes, Beatriz Maria Valério; Pinto, Lourdes dos Santos.
Rev. odontol. UNESP (Online); 40 (6), 2011
Este estudo in vitro avaliou a resistência de união por microtração (RUM) à dentina e a microinfiltração em restaurações de resina composta após preparos cavitários com ponta diamantada ultrassônica e ponta diamantada em alta rotação. Para o teste de RUM, utilizaram-se seis terceiros molare...
Técnicas In Vitro, Resistencia a la Tracción, Resinas Compuestas, Dentina, Análisis de Varianza, Ultrasonido, Diamante, Preparación de la Cavidad Dental, Filtración Dental
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