Cargando…

Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics

Heightened aesthetic considerations in modern dentistry have generated increased interest in metal-free “zirconia-supported dentures.” The lifespan of the denture is largely determined by the strength of adhesion between zirconia and the acrylic resin. Thus, the effect on shear bond strength (SBS) w...

Descripción completa

Detalles Bibliográficos
Autores principales: Shimoe, Saiji, Peng, Tzu-Yu, Wakabayashi, Yuki, Takenaka, Hiroto, Iwaguro, Shogo, Kaku, Masato
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7240430/
https://www.ncbi.nlm.nih.gov/pubmed/32260358
http://dx.doi.org/10.3390/polym12040817
_version_ 1783536880766156800
author Shimoe, Saiji
Peng, Tzu-Yu
Wakabayashi, Yuki
Takenaka, Hiroto
Iwaguro, Shogo
Kaku, Masato
author_facet Shimoe, Saiji
Peng, Tzu-Yu
Wakabayashi, Yuki
Takenaka, Hiroto
Iwaguro, Shogo
Kaku, Masato
author_sort Shimoe, Saiji
collection PubMed
description Heightened aesthetic considerations in modern dentistry have generated increased interest in metal-free “zirconia-supported dentures.” The lifespan of the denture is largely determined by the strength of adhesion between zirconia and the acrylic resin. Thus, the effect on shear bond strength (SBS) was investigated by using an acrylic resin on two types of zirconia ceramics with differently sized microslits. Micromechanical reticular retention was created on the zirconia surface as the novel treatment (microslits (MS)), and air-abrasion was used as the control (CON). All samples were primed prior to acrylic resin polymerization. After the resin was cured, the SBS was tested. The obtained data were analyzed by using multivariate analysis of variance(α = 0.05). After the SBS test, the interface failure modes were observed by scanning electron microscopy. The MS exhibited significantly higher bond strength after thermal cycles (p < 0.05) than the CON. Nevertheless, statistically comparisons resulted in no significant effect of the differently sized microslits on SBS (p > 0.05). Additionally, MS (before thermal cycles: 34.8 ± 3.6 to 35.7 ± 4.0 MPa; after thermal cycles: 26.9 ± 3.1 to 32.6 ± 3.3 MPa) demonstrated greater SBS and bonding durability than that of CON (before thermal cycles: 17.3 ± 4.7 to 17.9 ± 5.8 MPa; after thermal cycles: 1.0 ± 0.3 to 1.7 ± 1.1 MPa), confirming that the micromechanical retention with laser-milled microslits was effective at enhancing the bonding strength and durability of the acrylic resin and zirconia. Polycrystalline zirconia-based ceramics are a newly accessible material for improving removable prosthodontic treatment, as the bond strength with acrylic resin can be greatly enhanced by laser milling.
format Online
Article
Text
id pubmed-7240430
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-72404302020-06-11 Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics Shimoe, Saiji Peng, Tzu-Yu Wakabayashi, Yuki Takenaka, Hiroto Iwaguro, Shogo Kaku, Masato Polymers (Basel) Article Heightened aesthetic considerations in modern dentistry have generated increased interest in metal-free “zirconia-supported dentures.” The lifespan of the denture is largely determined by the strength of adhesion between zirconia and the acrylic resin. Thus, the effect on shear bond strength (SBS) was investigated by using an acrylic resin on two types of zirconia ceramics with differently sized microslits. Micromechanical reticular retention was created on the zirconia surface as the novel treatment (microslits (MS)), and air-abrasion was used as the control (CON). All samples were primed prior to acrylic resin polymerization. After the resin was cured, the SBS was tested. The obtained data were analyzed by using multivariate analysis of variance(α = 0.05). After the SBS test, the interface failure modes were observed by scanning electron microscopy. The MS exhibited significantly higher bond strength after thermal cycles (p < 0.05) than the CON. Nevertheless, statistically comparisons resulted in no significant effect of the differently sized microslits on SBS (p > 0.05). Additionally, MS (before thermal cycles: 34.8 ± 3.6 to 35.7 ± 4.0 MPa; after thermal cycles: 26.9 ± 3.1 to 32.6 ± 3.3 MPa) demonstrated greater SBS and bonding durability than that of CON (before thermal cycles: 17.3 ± 4.7 to 17.9 ± 5.8 MPa; after thermal cycles: 1.0 ± 0.3 to 1.7 ± 1.1 MPa), confirming that the micromechanical retention with laser-milled microslits was effective at enhancing the bonding strength and durability of the acrylic resin and zirconia. Polycrystalline zirconia-based ceramics are a newly accessible material for improving removable prosthodontic treatment, as the bond strength with acrylic resin can be greatly enhanced by laser milling. MDPI 2020-04-04 /pmc/articles/PMC7240430/ /pubmed/32260358 http://dx.doi.org/10.3390/polym12040817 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shimoe, Saiji
Peng, Tzu-Yu
Wakabayashi, Yuki
Takenaka, Hiroto
Iwaguro, Shogo
Kaku, Masato
Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics
title Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics
title_full Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics
title_fullStr Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics
title_full_unstemmed Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics
title_short Laser-Milled Microslits Improve the Bonding Strength of Acrylic Resin to Zirconia Ceramics
title_sort laser-milled microslits improve the bonding strength of acrylic resin to zirconia ceramics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7240430/
https://www.ncbi.nlm.nih.gov/pubmed/32260358
http://dx.doi.org/10.3390/polym12040817
work_keys_str_mv AT shimoesaiji lasermilledmicroslitsimprovethebondingstrengthofacrylicresintozirconiaceramics
AT pengtzuyu lasermilledmicroslitsimprovethebondingstrengthofacrylicresintozirconiaceramics
AT wakabayashiyuki lasermilledmicroslitsimprovethebondingstrengthofacrylicresintozirconiaceramics
AT takenakahiroto lasermilledmicroslitsimprovethebondingstrengthofacrylicresintozirconiaceramics
AT iwaguroshogo lasermilledmicroslitsimprovethebondingstrengthofacrylicresintozirconiaceramics
AT kakumasato lasermilledmicroslitsimprovethebondingstrengthofacrylicresintozirconiaceramics