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79630

EFFECT OF CURING PROCESS OF DENTAL NANOCOMPOSITE RESIN ON SHORE HARDNESS

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Last updated: 25 Dec 2024

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Abstract

The objectives of this study is to determine the effect of light curing modes and curing times on the Shore hardness of hybrid composite resin filled with titanium dioxide (TiO2) nanoparticle. The materials used were hybrid composite resin and titanium dioxide nanoparticles (TiO2 nanoparticles). Four groups of composite resin specimens were prepared; one as received and three groups reinforced with   TiO2 nanoparticles in concentrations of 0.1, 0.2 and 0.3 wt. %. TiO2 nanoparticles were manually mixed with hybrid composites resin. The resulting paste was packed into plastic bars. The specimens were then polymerized from both sides for 10, 20, 40, 60 and 80 seconds using a visible light curing unit. The light polymerization modes used were gradually strong, flashing and strong mode. Surface hardness was measured using Shore D durometer test.  The use of gradually strong curing mode resulted in lower hardness for the unreinforced hybrid composites resin filled with TiO2 nanoparticles compared with the hardness obtained using the flashing mode and strong curing mode. Specimens of curing time 10, 20 and 40 seconds exhibited lower hardness compared to 60 and 80 seconds curing time. This study indicated that, strong curing mode produced dental nanocomposite resin with higher Shore hardness, where 80 seconds curing time gave higher values of Shore hardness. Shore hardness results are significantly affected by curing times compared to curing modes.

DOI

10.21608/jest.2016.79630

Keywords

Titanium dioxide, Nanoparticles, hybrid composite resin, dental nanocomposite, shore hardness, polymerization modes, curing times

Authors

First Name

A. A.

Last Name

Meshref

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Affiliation

Production Engineering and Design Department, Faculty of Engineering, Minia University,

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First Name

A. A.

Last Name

Mazen

MiddleName

-

Affiliation

Production Engineering and Design Department, Faculty of Engineering, Minia University,

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Orcid

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First Name

M. A.

Last Name

El-Giushi

MiddleName

-

Affiliation

Production Engineering and Design Department, Faculty of Engineering, Minia University,

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City

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Orcid

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First Name

W. Y.

Last Name

Ali

MiddleName

-

Affiliation

Production Engineering and Design Department, Faculty of Engineering, Minia University,

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-

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Volume

13

Article Issue

2

Related Issue

11884

Issue Date

2016-04-01

Receive Date

2016-01-30

Publish Date

2016-04-01

Page Start

25

Page End

37

Print ISSN

2090-5882

Online ISSN

2090-5955

Article File

JEST_Volume 13_Issue 2_Pages 25-37.pdf

PDF . 524.6kB

Link

https://jest.journals.ekb.eg/article_79630.html

Detail API

https://jest.journals.ekb.eg/service?article_code=79630

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3

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Original Article

Type Code

1,211

Publication Type

Journal

Publication Title

Journal of the Egyptian Society of Tribology

Publication Link

https://jest.journals.ekb.eg/

MainTitle

EFFECT OF CURING PROCESS OF DENTAL NANOCOMPOSITE RESIN ON SHORE HARDNESS

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Article

Created At

22 Jan 2023