Results 1 to 10 of about 55,204 (195)

Microhardness of bulk-fill composite materials

Acta Clinica Croatica, 2016
The aim of the study was to determine microhardness of high- and low-viscosity bulk-fill composite resins and compare it with conventional composite materials. Four materials of high-viscosity were tested, including three bulk-fills: QuiXfi l (QF), x-tra
Katarina Kelić, Sanja Matić, Danijela Marović, Eva Klarić, Zrinka Tarle   +4 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

Comparison of microhardness of three interim restorative materials: PEEK, PMMA and indirect composite

Journal of Dental School, 2021
Objectives Interim restorations play a critical role in success of restorative treatments. However, they need to preserve their integrity in the oral environment.
Parinaz Ansari, Mehran Nourbakhsh, Sara Koosha   +2 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

Measurement and Analysis of Hydrogen Distribution in Stress Environment Using Vickers Microhardness Technique

Advances in Materials Science and Engineering, 2018
In this paper, the stress distribution field in front of the crack tip was obtained by loading a modified WOL specimen using a bolt. Considering the relationship between microhardness and hydrogen content or internal stress in the metal, a model based on
Lei Gu, Jing Wang, Xiaoyang Li, Yanjun Zeng   +3 more
doaj   +1 more source

ENAMEL MICROHARDNESS AFTER APPLICATION OF 30% CARBAMIDE PEROXIDE AND SUBSEQUENTLY AFTER APPLICATION OF FLUORIDE

Journal of Dentistry Indonesia, 2015
Thirty percent carbamide peroxide is widely used as in extra-coronal bleaching method. Its current effect on enamel (e.g. enamel microhardness) is still uncertain. In dentistry, fluoride is recommended to be applied in 60 seconds.
Inawati Muljadi, Kamizar Kamizar, Narlan Sumawinata   +2 more
doaj   +1 more source