Results: 41

Porosity, water sorption and solubility of denture base acrylic resins polymerized conventionally or in microwave

J. appl. oral sci; 26 (), 2018
Abstract The proper selection of polymerization cycle is important to prevent overheating of the monomer that could cause degradation, porosity and, consequently, deleterious effects on the denture base properties. Objective This study evaluated the porosity, water sorption and solubility of acrylic res...

Solubility, porosity and fluid uptake of calcium silicate-based cements

J. appl. oral sci; 26 (), 2018
Abstract Objective: To evaluate the absorption/fluid uptake, solubility and porosity of White mineral trioxide aggregate (MTA) Angelus, Biodentine (BIO), and zinc oxide-eugenol (ZOE). Material and Methods: Solubility was evaluated after immersion in distilled water for 7 and 30 days. Porosity was evalu...

Micro-CT analysis of filling ability and porosity of root-end filling materials

Introduction: Filling ability of retrograde cavity and porosity are important properties for root-end filling materials and may be evaluated by using microcomputed tomography (micro-CT). Objective: To evaluate filling ability and porosity of root-end filling materials using microcomputed tomography (mic...

A Novel Porous Diamond - Titanium Biomaterial: Structure, Microstructure, Physico-Mechanical Properties and Biocompatibility

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°...

Porosidades de fundição e suas causas
Porosities casting and their causes

Prosthes. Lab. Sci; 6 (22), 2017
A técnica moderna de fundição laboratorial permite um maior controle das ligas metálicas se comparada aos processos utilizados antigamente. O processo de fundição apresenta muitas variáveis e exige experiência. Durante a transformação de fase do resfriamento, o metal sofre várias modificaçõe...

Porosity of temporary denture soft liners containing antifungal agents

J. appl. oral sci; 24 (5), 2016
ABSTRACT Incorporation of antifungals in temporary denture soft liners has been recommended for denture stomatitis treatment; however, it may affect their properties. Objective: To evaluate the porosity of a tissue conditioner (Softone) and a temporary resilient liner (Trusoft) modified by minimum inhib...

Efeito da incorporação de agentes antifúngicos na resistência à tração e porosidade de materiais resilientes temporários para base de próteses

Este estudo investigou a resistência à tração (ou limite de resistência à tração- LRT) e a porosidade de reembasadores resilientes temporários modificados por concentrações inibitórias mínimas (CIMs) de agentes antifúngicos para o biofilme Candida albicans (SC5314). Para os testes de LRT, c...

A influência da incorporação de clorexidina nas propriedades mecânicas de resinas macias para bases de dentaduras

A incorporação do diacetato de clorexidina em resinas macias para o reembasamento de próteses removíveis pode se tornar um método eficaz no combate à Candida albicans, principal agente causador da Estomatite Protética. Dessa forma, este trabalho teve como objetivo avaliar os efeitos da incorporaç...

Effect of chlorhexidine gluconate on porosity and compressive strength of a glass ionomer cement

Introduction: For presenting wide antibacterial activity, chlorhexidine (CHX) has been extensively used in dentistry and can be easily incorporated into the glass ionomer cement (GIC) and consequently released into the oral cavity. Aim: The aim of this study was porosity and compression strength of a GIC...

Cyclodextrin glucanotransferase immobilization onto functionalized magnetic double mesoporous core-shell silica nanospheres

Electron. j. biotechnol; 17 (2), 2014
Background Cyclodextrin glucanotransferase (CGTase) from Amphibacillus sp. NPST-10 was covalently immobilized onto amino-functionalized magnetic double mesoporous core-shell silica nanospheres (mag@d-SiO2@m-SiO2-NH2), and the properties of the immobilized enzyme were investigated. The synthesis process o...