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Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin
PURPOSE: The discoloration of acrylic resin denture bases may lead to significant esthetic problems. The aim of this in vitro study was to investigate the effects of frequently consumed drinks on the color changes of fresh and aged, heat-polymerized, conventional acrylic resin. MATERIALS AND METHODS...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Istanbul University Faculty of Dentisty
2016
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5573510/ https://www.ncbi.nlm.nih.gov/pubmed/28955571 http://dx.doi.org/10.17096/jiufd.28587 |
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author | Altinci, Pinar Durkaya, Pinar |
author_facet | Altinci, Pinar Durkaya, Pinar |
author_sort | Altinci, Pinar |
collection | PubMed |
description | PURPOSE: The discoloration of acrylic resin denture bases may lead to significant esthetic problems. The aim of this in vitro study was to investigate the effects of frequently consumed drinks on the color changes of fresh and aged, heat-polymerized, conventional acrylic resin. MATERIALS AND METHODS: Eighty-four, heat-polymerized acrylic resin specimens (4 mm x 5 mm x 30 mm) were fabricated. Half of the specimens were aged by thermal cycling (between 5°C and 55°C, 60-second dwell time, 3000 cycles). The specimens were stored at 37°C in different drinks as non-aged and aged subgroups including water (control group), black tea, green tea, sour cherry juice, coke and coffee (n=7). The discoloration of each specimen after 1 and 7 days storage in the drinks were measured by a colorimeter based on CIE Lab system. The data of colour differences (ΔE) were analyzed by ANOVA and Dunnet’s tests. RESULTS: Thermal cycling and storage in water induced a slight color change. The highest ΔE values were observed in the aged groups, which was also noticeable for black tea and sour cherry juice after 7 days of storage (ΔE>1.5) (p<0.05). The ΔE values of all test groups were detected within the acceptable clinical limits (ΔE<3.5). CONCLUSION: These results suggest that the color stability of denture base acrylic resins is influenced by ageing. Black tea, sour cherry juice and coke can cause significant discolorations on acrylic resin denture bases. |
format | Online Article Text |
id | pubmed-5573510 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Istanbul University Faculty of Dentisty |
record_format | MEDLINE/PubMed |
spelling | pubmed-55735102017-09-27 Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin Altinci, Pinar Durkaya, Pinar J Istanb Univ Fac Dent Articles PURPOSE: The discoloration of acrylic resin denture bases may lead to significant esthetic problems. The aim of this in vitro study was to investigate the effects of frequently consumed drinks on the color changes of fresh and aged, heat-polymerized, conventional acrylic resin. MATERIALS AND METHODS: Eighty-four, heat-polymerized acrylic resin specimens (4 mm x 5 mm x 30 mm) were fabricated. Half of the specimens were aged by thermal cycling (between 5°C and 55°C, 60-second dwell time, 3000 cycles). The specimens were stored at 37°C in different drinks as non-aged and aged subgroups including water (control group), black tea, green tea, sour cherry juice, coke and coffee (n=7). The discoloration of each specimen after 1 and 7 days storage in the drinks were measured by a colorimeter based on CIE Lab system. The data of colour differences (ΔE) were analyzed by ANOVA and Dunnet’s tests. RESULTS: Thermal cycling and storage in water induced a slight color change. The highest ΔE values were observed in the aged groups, which was also noticeable for black tea and sour cherry juice after 7 days of storage (ΔE>1.5) (p<0.05). The ΔE values of all test groups were detected within the acceptable clinical limits (ΔE<3.5). CONCLUSION: These results suggest that the color stability of denture base acrylic resins is influenced by ageing. Black tea, sour cherry juice and coke can cause significant discolorations on acrylic resin denture bases. Istanbul University Faculty of Dentisty 2016-10-01 /pmc/articles/PMC5573510/ /pubmed/28955571 http://dx.doi.org/10.17096/jiufd.28587 Text en Copyright © 2016 Journal of Istanbul University Faculty of Dentistry This article is licensed under Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license ( (https://creativecommons.org/licenses/by-nc-nd/4.0/) ). Users must give appropriate credit, provide a link to the license, and indicate if changes were made. Users may do so in any reasonable manner, but not in any way that suggests the journal endorses its use. The material cannot be used for commercial purposes. If the user remixes, transforms, or builds upon the material, he/she may not distribute the modified material. No warranties are given. The license may not give the user all of the permissions necessary for his/her intended use. For example, other rights such as publicity, privacy, or moral rights may limit how the material can be used. |
spellingShingle | Articles Altinci, Pinar Durkaya, Pinar Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin |
title | Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin |
title_full | Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin |
title_fullStr | Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin |
title_full_unstemmed | Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin |
title_short | Effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin |
title_sort | effects of thermocycling and various drinks on the color stability of heat-polymerized acrylic resin |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5573510/ https://www.ncbi.nlm.nih.gov/pubmed/28955571 http://dx.doi.org/10.17096/jiufd.28587 |
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