Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites

This study investigates the repair bond strength of aged resin composites after removing different thicknesses, determine the repair performance using the same or different resin composites and describe the treated surfaces after ageing. Seventy simulated class I cavities were prepared in extracted...

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Autores principales:	Kai Yu, Minting Wan, Kui Shi, Longjian Xue, Zhi Chen, Lu Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	aged composite repair surface treatment bond strength resin composite class I cavity Technology T
Acceso en línea:	https://doaj.org/article/2870482c55b54a2faa7a1ac7e276c22a
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spelling	oai:doaj.org-article:2870482c55b54a2faa7a1ac7e276c22a2021-12-03T06:32:29ZRemoval of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites2296-801610.3389/fmats.2021.790165https://doaj.org/article/2870482c55b54a2faa7a1ac7e276c22a2021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmats.2021.790165/fullhttps://doaj.org/toc/2296-8016This study investigates the repair bond strength of aged resin composites after removing different thicknesses, determine the repair performance using the same or different resin composites and describe the treated surfaces after ageing. Seventy simulated class I cavities were prepared in extracted human third molars were randomly divided into two groups and restored with a nanofilled (Filtek Z350) or a microhybrid (Clearfil APX) composite. Five specimens without ageing in each group acted as a positive control for microtensile bond strength (MTBS) test. After thermocycling, each group was randomly divided into two subgroups: Group RT1, 1 mm removed and Group RT3, 3 mm removed, followed by roughening. Ten specimens in each subgroup were repaired with the same or different composites, and MTBS tests were conducted. The surface roughness (Sa), and water contact angle of the remaining five specimens in each subgroup were measured. In every combination group, Group RT3 showed significantly higher MTBS values than Group RT1, and identical composite was not compulsory for higher repair bond strength. Removal thickness had no significant effect on the Sa in same composite group. In both the Z350 and APX groups, the water contact angle decreased with increasing removal thickness.Kai YuKai YuMinting WanMinting WanKui ShiLongjian XueZhi ChenZhi ChenLu ZhangLu ZhangFrontiers Media S.A.articleaged composite repairsurface treatmentbond strengthresin compositeclass I cavityTechnologyTENFrontiers in Materials, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aged composite repair surface treatment bond strength resin composite class I cavity Technology T
spellingShingle	aged composite repair surface treatment bond strength resin composite class I cavity Technology T Kai Yu Kai Yu Minting Wan Minting Wan Kui Shi Longjian Xue Zhi Chen Zhi Chen Lu Zhang Lu Zhang Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites
description	This study investigates the repair bond strength of aged resin composites after removing different thicknesses, determine the repair performance using the same or different resin composites and describe the treated surfaces after ageing. Seventy simulated class I cavities were prepared in extracted human third molars were randomly divided into two groups and restored with a nanofilled (Filtek Z350) or a microhybrid (Clearfil APX) composite. Five specimens without ageing in each group acted as a positive control for microtensile bond strength (MTBS) test. After thermocycling, each group was randomly divided into two subgroups: Group RT1, 1 mm removed and Group RT3, 3 mm removed, followed by roughening. Ten specimens in each subgroup were repaired with the same or different composites, and MTBS tests were conducted. The surface roughness (Sa), and water contact angle of the remaining five specimens in each subgroup were measured. In every combination group, Group RT3 showed significantly higher MTBS values than Group RT1, and identical composite was not compulsory for higher repair bond strength. Removal thickness had no significant effect on the Sa in same composite group. In both the Z350 and APX groups, the water contact angle decreased with increasing removal thickness.
format	article
author	Kai Yu Kai Yu Minting Wan Minting Wan Kui Shi Longjian Xue Zhi Chen Zhi Chen Lu Zhang Lu Zhang
author_facet	Kai Yu Kai Yu Minting Wan Minting Wan Kui Shi Longjian Xue Zhi Chen Zhi Chen Lu Zhang Lu Zhang
author_sort	Kai Yu
title	Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites
title_short	Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites
title_full	Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites
title_fullStr	Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites
title_full_unstemmed	Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites
title_sort	removal of different thicknesses influences the repair bond strength of dental resin composites
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/2870482c55b54a2faa7a1ac7e276c22a
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Removal of Different Thicknesses Influences the Repair Bond Strength of Dental Resin Composites

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