Flexural properties and wear behavior of computer-aided design/computer-aided manufacturing resin blocks

Hajime Oouchi; Toshiki Takamizawa; Tomohiko Tamura; Ryo Ishii; Akimasa Tsujimoto; Masashi Miyazaki; Nobuya Kitahara

doi:10.4012/dmj.2020-381

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Flexural properties and wear behavior of computer-aided design/computer-aided manufacturing resin blocks

Journal article

Open access

Peer reviewed

Flexural properties and wear behavior of computer-aided design/computer-aided manufacturing resin blocks

Hajime Oouchi, Toshiki Takamizawa, Tomohiko Tamura, Ryo Ishii, Akimasa Tsujimoto, Masashi Miyazaki and Nobuya Kitahara

Dental materials journal, Vol.40(4), pp.979-985

07/25/2021

DOI: 10.4012/dmj.2020-381

PMID: 33883355

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https://doi.org/10.4012/dmj.2020-381View

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Abstract

This study investigates the flexural properties, Knoop hardness number (KHN), and wear behavior of computer-aided design and computer-aided manufacturing (CAD/CAM) resin blocks and compares these values with those of conventional resin composites for direct restoration (RCDs). Four CAD/CAM resin blocks and two RCDs are compared. Ten specimens per material are used to obtain the flexural properties according to ISO 6872 specifications, and five specimens per material are used for KHN measurement. For sliding impact wear testing, twelve specimens are prepared. Confocal laser scanning microscopy (LSM) is used to determine maximum facet depth and volume loss. Polished material surfaces and worn surfaces after wear testing are observed using scanning electron microscopy and LSM. While measured flexural properties and KHN are found to be material-dependent, CAD/CAM resin blocks exhibit higher wear resistance than RCDs. CAD/CAM resin blocks polymerized at high-pressure and high-temperature are found to exhibit wear behaviors far superior to those of RCDs.

CAD/CAM resin composite

Flexural properties

Wear behavior

Details

Title: Subtitle: Flexural properties and wear behavior of computer-aided design/computer-aided manufacturing resin blocks
Creators: Hajime Oouchi - Department of Operative Dentistry, Nihon University School of Dentistry
Toshiki Takamizawa - Department of Operative Dentistry, Nihon University School of Dentistry
Tomohiko Tamura - Department of Operative Dentistry, Nihon University School of Dentistry
Ryo Ishii - Department of Operative Dentistry, Nihon University School of Dentistry
Akimasa Tsujimoto - Department of Operative Dentistry, Nihon University School of Dentistry
Masashi Miyazaki - Department of Operative Dentistry, Nihon University School of Dentistry
Nobuya Kitahara - Department of Operative Dentistry, Nihon University School of Dentistry
Resource Type: Journal article
Publication Details: Dental materials journal, Vol.40(4), pp.979-985
DOI: 10.4012/dmj.2020-381
PMID: 33883355
NLM abbreviation: Dent Mater J
ISSN: 0287-4547
eISSN: 1881-1361
Publisher: The Japanese Society for Dental Materials and Devices
Language: English
Date published: 07/25/2021
Academic Unit: Operative Dentistry
Record Identifier: 9984176825502771

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