Results 11 to 20 of about 24,480 (261)

The Effect of Human Blood and Platelet-rich Fibrin on the Surface Microhardness of Hydraulic Calcium Silicate-based Cements

Frontiers in Dentistry
Objectives: This study aimed to compare the effect of human blood and platelet-rich fibrin (PRF) on the surface microhardness of hydraulic calcium silicate-based cements (OrthoMTA and RetroMTA).
Noushin Shokouhinejad, Pourya Hosseini, Hasan Razmi   +2 more
doaj   +2 more sources

Theobromine Effects on Enamel Surface Microhardness: In Vitro

Journal of Dentistry Indonesia, 2013
Dental caries is still a dental health problem in Indonesia. Fluoride, one of the dental caries prevention material, but its safety and the danger of fluorosis is still debated. Theobromine is an alkaloid compound contained in cocoa beans. Theobromine is
Grace Syafira, Rina Permatasari, Nina Wardani   +2 more
doaj   +2 more sources

Effect of thermocycling on internal microhardness of high and low viscosity bulk fill composite resins in class I cavities [PDF]

RGO: Revista Gaúcha de Odontologia, 2023
Objective: To evaluate the effect of thermocycling on the Knoop internal microhardness of high- and low viscosity bulk fill resins applied in Class I cavities.
Sâmara Luciana de Andrade LIMA, Lais Lemos CABRAL, Natália Russo CARLOS, Saulo André de Andrade LIMA, Kamila Rosamilia KANTOVITZ, Flávia Lucisano Botelho do AMARAL   +5 more
doaj   +1 more source

Evaluation of Microhardness of Two Bulk-fill Composite Resins Compared to a Conventional Composite Resin on surface and in Different Depths

Journal of Dentistry, 2022
Statement of the Problem: One of the problems with light-cured composite resins is the limitation and inadequate depth of curing and polymerization, resulting in low surface microhardness and restoration failure.
Keyvan Saati , Sheida Khansari , Farnaz Mahdisiar , Sara Valizadeh   +3 more
doaj   +1 more source

Comparative studies of the strength properties of germanum and silicon single crystals

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2022
In this paper, we present the results of microhardness tests performed by Vickers indentation of germanium and silicon single crystals. It’s shown that in the investigated samples there is a dependence of microhardness on the crystallographic directions ...
A.I. Ivanova, P.A. Svesnikov, K.A. Marinicheva, K.A. Gugutsidze, A.D. Vasilev, S.A. Tretiakov, A.Yu. Karpenkov   +6 more
doaj   +1 more source

Long-term effect of acidic pH on the surface microhardness of ProRoot mineral trioxide aggregate, Biodentine, and total fill root repair material putty

Dental Research Journal, 2021
Background: The purpose of this study was to compare the microhardness values of ProRoot mineral trioxide aggregate (MTA), Biodentine, and total fill root repair material (TF-RRM) Putty at varying pH and times.
Koral Bayraktar, Fatima Betul Basturk, Dilek Turkaydin, Mahir Gunday   +3 more
doaj   +1 more source

Influence of SAW Welding Parameters on Microhardness of Steel A516-Gr60 [PDF]

Engineering and Technology Journal, 2018
Submerged Arc Welding (SAW) process is generally used for industries, such as petroleum storage tanks, pressure vessels, and structural components.Good mechanical properties of welded joint lead to crack-free strong joints.
Sadeq Bakhy, Samir Amin, Fouad Abdullah
doaj   +1 more source

Discrete characteristic and edge effect during subsurface microhardness measurement of Ti-6Al-4V alloy

Materials Research Express, 2022
This paper investigates the discrete characteristic and edge effect of subsurface microhardness of Ti-6Al-4V alloy. The results show that the discrete degree of Ti-6Al-4V alloy microhardness decreases with increasing loading force. When the loading force
Ning Hou, Yuxin Zhang, Minghai Wang, Shutao Huang, Xianjun Kong   +4 more
doaj   +1 more source

Vickers micro-hardness study of the effect of fluoride mouthwash on two types of CAD/CAM ceramic materials erosion

BMC Oral Health, 2022
Background The aim of this study was to evaluate the protective effects of fluoride mouthwash on the surface micro-hardness of two types of CAD/CAM ceramics after exposure to acidic solutions.
Hamid Kermanshah, Elham Ahmadi, Niyousha Rafeie, Shiva Rafizadeh, Ladan Ranjbar Omrani   +4 more
doaj   +1 more source

An experimental investigation of the effects of radiation and thermal parameters on the aluminum 1050 obtained from upward directional solidification

Journal of Materials Research and Technology, 2023
During the reactor operation, aluminum tank and the core components can experience radiation damage, resulting in limitation of its life span. Effects of radiation on the aluminum alloys are not yet fully understood, especially when material is obtained ...
Wysllan Jefferson Lima Garção, Davi Ferreira de Oliveira, Olga Maria de Oliveira Araújo, Cesar Giron Camerini, Roberto Carlos Sales, Alexandre Furtado Ferreira   +5 more
doaj   +1 more source