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Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study

AIM: The aim of this study was to evaluate the microtensile bond strength (μTBS) of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum. MATERIALS AND METHODS: Standardized conservative box-shaped Class II cavities were prepared on six...

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Autores principales: Taneja, Sonali, Kumar, Pragya, Kumar, Avnish
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5146768/
https://www.ncbi.nlm.nih.gov/pubmed/27994314
http://dx.doi.org/10.4103/0972-0707.194023
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author Taneja, Sonali
Kumar, Pragya
Kumar, Avnish
author_facet Taneja, Sonali
Kumar, Pragya
Kumar, Avnish
author_sort Taneja, Sonali
collection PubMed
description AIM: The aim of this study was to evaluate the microtensile bond strength (μTBS) of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum. MATERIALS AND METHODS: Standardized conservative box-shaped Class II cavities were prepared on sixty sound-impacted human third molars. The samples were randomly divided into two groups: Group I (n = 30) - horizontal incremental technique and Group II (n = 30) - bulk fill technique (SonicFill). They were further subdivided into three subgroups of (n = 10) samples each according to the different occluso-gingival height: subgroup (A - 4 mm, B - 5 mm, and C - 6 mm). The gingival margins for all the samples were located 1 mm below the cementoenamel junction. The restored samples were subjected to thermocycling (500 cycles) followed by μTBS testing. The scores were statistically analyzed using ANOVA and post hoc test using SPSS software version 16. RESULTS: Subgroups IA and IB showed lower μTBS than subgroups IIA and IIB (P < 0.05) whereas subgroup IC showed higher μTBS than subgroup IIC (P < 0.05). SonicFill showed a significant reduction in μTBS as the depth increased. CONCLUSION: SonicFill should be used in two increments for cavities with a depth of more than 5 mm.
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spelling pubmed-51467682016-12-19 Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study Taneja, Sonali Kumar, Pragya Kumar, Avnish J Conserv Dent Original Article AIM: The aim of this study was to evaluate the microtensile bond strength (μTBS) of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum. MATERIALS AND METHODS: Standardized conservative box-shaped Class II cavities were prepared on sixty sound-impacted human third molars. The samples were randomly divided into two groups: Group I (n = 30) - horizontal incremental technique and Group II (n = 30) - bulk fill technique (SonicFill). They were further subdivided into three subgroups of (n = 10) samples each according to the different occluso-gingival height: subgroup (A - 4 mm, B - 5 mm, and C - 6 mm). The gingival margins for all the samples were located 1 mm below the cementoenamel junction. The restored samples were subjected to thermocycling (500 cycles) followed by μTBS testing. The scores were statistically analyzed using ANOVA and post hoc test using SPSS software version 16. RESULTS: Subgroups IA and IB showed lower μTBS than subgroups IIA and IIB (P < 0.05) whereas subgroup IC showed higher μTBS than subgroup IIC (P < 0.05). SonicFill showed a significant reduction in μTBS as the depth increased. CONCLUSION: SonicFill should be used in two increments for cavities with a depth of more than 5 mm. Medknow Publications & Media Pvt Ltd 2016 /pmc/articles/PMC5146768/ /pubmed/27994314 http://dx.doi.org/10.4103/0972-0707.194023 Text en Copyright: © Journal of Conservative Dentistry http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
spellingShingle Original Article
Taneja, Sonali
Kumar, Pragya
Kumar, Avnish
Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study
title Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study
title_full Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study
title_fullStr Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study
title_full_unstemmed Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study
title_short Comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of Class II cavities with the cervical margin in cementum: An in vitro study
title_sort comparative evaluation of the microtensile bond strength of bulk fill and low shrinkage composite for different depths of class ii cavities with the cervical margin in cementum: an in vitro study
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5146768/
https://www.ncbi.nlm.nih.gov/pubmed/27994314
http://dx.doi.org/10.4103/0972-0707.194023
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