Results 71 to 80 of about 98,119 (208)

Effect of the increase of energy density on Knoop hardness of dental composites light-cured by conventional QTH, LED and xenon plasma arc.

Brazilian Dental Journal, 2005
The aim of this study was to evaluate the effect of the increase of energy density on Knoop hardness of Z250 and Esthet-X composite resins. Cylindrical cavities (3 mm in diameter X 3 mm in depth) were prepared on the buccal surface of 144 bovine incisors.
A. Correr, M. Sinhoreti, L. C. Sobrinho, R. Tango, L. F. Schneider, S. Consani   +5 more
semanticscholar   +1 more source

Effect of ageing and immersion in different beverages on properties of denture lining materials

Journal of Applied Oral Science, 2010
OBJECTIVES: To evaluate the color stability and hardness of two denture liners obtained by direct and indirect techniques, after thermal cycling and immersion in beverages that can cause staining of teeth.
Vanessa M. F. Leite, Marina X. Pisani, Helena F. O. Paranhos, Raphael F. Souza, Cláudia H. Silva-Lovato   +4 more
doaj   +1 more source

Análise de metodologias de microdureza aplicadas a compósitos: é possível comparar resultados utilizando-se diferentes protocolos? [PDF]

, 2010
Objective: Firstly, to evaluate correlation between load and dwell time in composite resin microhardness tests, using Vickers and Knoop mechanic test methods. Secondly, to correlate time and load on Knoop microhardness test over a composite resin, and to
Barbosa, Gustavo Frainer
core  

Assessing the Impact of Vegan Toothpastes on Enamel Color Change and Surface Properties

Journal of Esthetic and Restorative Dentistry, Volume 37, Issue 9, Page 2104-2115, September 2025.
ABSTRACT Objective To evaluate color (ΔE00) and whiteness index (ΔWID) changes, surface hardness loss (SHL), roughness (Ra), mineral content, and morphology of enamel brushed with vegan toothpastes. Methods Enamel blocks (n = 10/group) were stained with black tea (T0) underwent 15.000 (T1) and 30.000 (T2) toothbrushing cycles with: (n = 10): (AS ...
Reginna Vyctoria da Trindade Souza de Melo Carneiro, Raissa Manoel Garcia, Tais Scaramucci, Vanessa Cavalli   +3 more
wiley   +1 more source

Influence of Thickener and Mineral Supplementation of Bleaching Gels on Enamel Demineralization

Journal of Esthetic and Restorative Dentistry, Volume 37, Issue 9, Page 2144-2153, September 2025.
ABSTRACT Objective This study evaluated the effect of the type of thickener and mineral supplementation of bleaching gels on enamel demineralization. Materials and Methods Enamel specimens were divided into five groups according to the type of thickener: CA‐Carbopol, AE‐Aerosil 200, PO‐Poloxamer 407, GG‐Guar gum, and HEC‐Hydroxyethyl cellulose.
Adrielle Caroline Moreira Andrade, Allegra Comba, Nicola Scotti, Leila Es Sebar, Carlos Rocha Gomes Torres   +4 more
wiley   +1 more source

Effect of different modes of light modulation on the bond strength and knoop hardness of a dental composite.

Brazilian Dental Journal, 2008
This study evaluated the bond strength and Knoop hardness of Z250 composite resin, light activated with XL2500 curing unit, using different protocols: continuous mode - high intensity (CH) (700 mW/cm(2)) for 20 s; continuous mode - low intensity (CL ...
Eduardo Dalli'Magro, M. Sinhoreti, A. Correr, R. Consani, E. Sicoli, Marcio José Mendoça, L. Correr-Sobrinho   +6 more
semanticscholar   +1 more source

Thermal Behavior in the Lens Process [PDF]

, 1998
Direct laser metal deposition processing is a promising manufacturing technology which could significantly impact the length oftime between initial concept and finished part.
Baldwin, M. D., Brooks, J., Ensz, M. T., Essien, M., Griffith, M., Harwell, L. D., Hofineister, W. H., Nelson, D. V., Oliver, M. S., Robino, C. V., Schlienger, M. E., Smugeresky, J. E., Wert, M. J.   +12 more
core   +1 more source

Evaluation of compressive and adhesive strengths of a hybrid ceramic and 5Y‐PSZ zirconia cemented with three different materials

European Journal of Oral Sciences, Volume 133, Issue 4, August 2025.
Abstract This study aimed to evaluate the compressive and adhesive strengths of ceramic restorations (PICN and 5Y‐PSZ zirconia) cemented with one of three types of cements: conventional glass ionomer cement (GI), resin‐modified glass ionomer cement (RM‐GI), and self‐adhesive resin cement (R).
Letícia Moreschi, João Paulo De Carli, Marciele Cristiane Spanemberg Fuhr, Renan Brandenburg dos Santos, Paulo Renato Pulga da Silva, Pedro Henrique Corazza   +5 more
wiley   +1 more source

Evaluation of depth of cure and Knoop hardness in a dental composite photo-activated using different methods.

Brazilian Dental Journal, 2004
The aim of this study was to evaluate the depth of cure and Knoop hardness in the P60 composite resin photo-activated using different methods. A bipartite brass matrix (3 mm in diameter X 11 mm in height) was filled with the composite and photo ...
Andresa Carla Obici, M. Sinhoreti, L. Correr Sobrinho, M. D. De Goes, S. Consani   +4 more
semanticscholar   +1 more source

Surface Hardness of Resin Cement Polymerized under Different Ceramic Materials

International Journal of Dentistry, 2012
Objectives. To evaluate the surface hardness of two light-cured resin cements polymerized under different ceramic discs. Methods. 40 experimental groups of 2 light-cured resin cement specimens (Variolink Veneer and NX3) were prepared and polymerized ...
Pimmada Kesrak, Chalermpol Leevailoj
doaj   +1 more source