Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface

This study assesses the effect of the material type (lithium disilicate, zirconia, and polymer-infiltrated ceramic) and dental bonding substrates (dentin, dentin with intra-coronal cavity, and dentin with composite filling) on the fracture resistance and failure mode of molars restored by occlusal v...

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Autores principales:	Walid Al-Zordk, Alaa Saudi, Abdelraheem Abdelkader, Mansoura Taher, Mohamed Ghazy
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bonded restoration tooth wear table-top non-retentive resin cement Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/0d8d74b8f100464e92c75cb0471b381f
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spelling	oai:doaj.org-article:0d8d74b8f100464e92c75cb0471b381f2021-11-11T18:03:12ZFracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface10.3390/ma142164761996-1944https://doaj.org/article/0d8d74b8f100464e92c75cb0471b381f2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6476https://doaj.org/toc/1996-1944This study assesses the effect of the material type (lithium disilicate, zirconia, and polymer-infiltrated ceramic) and dental bonding substrates (dentin, dentin with intra-coronal cavity, and dentin with composite filling) on the fracture resistance and failure mode of molars restored by occlusal veneers. Methods: Ninety occlusal veneers, fabricated from either lithium disilicate, zirconia, or polymer-infiltrated ceramic, were adhesively bonded to teeth prepared with either dentin, dentin with intra-coronal cavity, or dentin with composite filling. All specimens were thermally aged (5000 cycles), then load cycled (120,000 cycles). Each specimen was subjected to a compressive load through fracture, then was examined (×20) to identify the fracture type. Data were statistically analyzed. Results: Material type and dental substrate had no significant effect on the fracture resistance of adhesively retained occlusal veneer restorations. For each material, no significant differences were found between veneers bonded to dentin, dentin with intra-coronal cavity, and dentin with composite filling. Additionally, within each bonding substrate, there were no significant differences between lithium disilicate, zirconia, and polymer-infiltrated ceramic veneers. The adhesive failure was recorded mainly with zirconia occlusal veneer restorations. Conclusions: Considering the fracture results, lithium disilicate, zirconia, and polymer-infiltrated ceramic occlusal veneers perform well whatever the type of dental bonding surface. When the dental bonding surface varies, different occlusal veneer materials should be considered. Occlusal veneers bonded to dentin, dentin with composite filling, or dentin with an intra-coronal cavity exhibited a fracture resistance exceeding the average human masticatory forces in the molar area.Walid Al-ZordkAlaa SaudiAbdelraheem AbdelkaderMansoura TaherMohamed GhazyMDPI AGarticlebonded restorationtooth weartable-topnon-retentiveresin cementTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6476, p 6476 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bonded restoration tooth wear table-top non-retentive resin cement Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	bonded restoration tooth wear table-top non-retentive resin cement Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Walid Al-Zordk Alaa Saudi Abdelraheem Abdelkader Mansoura Taher Mohamed Ghazy Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface
description	This study assesses the effect of the material type (lithium disilicate, zirconia, and polymer-infiltrated ceramic) and dental bonding substrates (dentin, dentin with intra-coronal cavity, and dentin with composite filling) on the fracture resistance and failure mode of molars restored by occlusal veneers. Methods: Ninety occlusal veneers, fabricated from either lithium disilicate, zirconia, or polymer-infiltrated ceramic, were adhesively bonded to teeth prepared with either dentin, dentin with intra-coronal cavity, or dentin with composite filling. All specimens were thermally aged (5000 cycles), then load cycled (120,000 cycles). Each specimen was subjected to a compressive load through fracture, then was examined (×20) to identify the fracture type. Data were statistically analyzed. Results: Material type and dental substrate had no significant effect on the fracture resistance of adhesively retained occlusal veneer restorations. For each material, no significant differences were found between veneers bonded to dentin, dentin with intra-coronal cavity, and dentin with composite filling. Additionally, within each bonding substrate, there were no significant differences between lithium disilicate, zirconia, and polymer-infiltrated ceramic veneers. The adhesive failure was recorded mainly with zirconia occlusal veneer restorations. Conclusions: Considering the fracture results, lithium disilicate, zirconia, and polymer-infiltrated ceramic occlusal veneers perform well whatever the type of dental bonding surface. When the dental bonding surface varies, different occlusal veneer materials should be considered. Occlusal veneers bonded to dentin, dentin with composite filling, or dentin with an intra-coronal cavity exhibited a fracture resistance exceeding the average human masticatory forces in the molar area.
format	article
author	Walid Al-Zordk Alaa Saudi Abdelraheem Abdelkader Mansoura Taher Mohamed Ghazy
author_facet	Walid Al-Zordk Alaa Saudi Abdelraheem Abdelkader Mansoura Taher Mohamed Ghazy
author_sort	Walid Al-Zordk
title	Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface
title_short	Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface
title_full	Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface
title_fullStr	Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface
title_full_unstemmed	Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface
title_sort	fracture resistance and failure mode of mandibular molar restored by occlusal veneer: effect of material type and dental bonding surface
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0d8d74b8f100464e92c75cb0471b381f
work_keys_str_mv	AT walidalzordk fractureresistanceandfailuremodeofmandibularmolarrestoredbyocclusalveneereffectofmaterialtypeanddentalbondingsurface AT alaasaudi fractureresistanceandfailuremodeofmandibularmolarrestoredbyocclusalveneereffectofmaterialtypeanddentalbondingsurface AT abdelraheemabdelkader fractureresistanceandfailuremodeofmandibularmolarrestoredbyocclusalveneereffectofmaterialtypeanddentalbondingsurface AT mansourataher fractureresistanceandfailuremodeofmandibularmolarrestoredbyocclusalveneereffectofmaterialtypeanddentalbondingsurface AT mohamedghazy fractureresistanceandfailuremodeofmandibularmolarrestoredbyocclusalveneereffectofmaterialtypeanddentalbondingsurface
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Fracture Resistance and Failure Mode of Mandibular Molar Restored by Occlusal Veneer: Effect of Material Type and Dental Bonding Surface

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