Development and assessment of an objective method of colour change measurement for acrylic denture base resins

SUMMARY Current standard specifications for the laboratory evaluation of denture base materials require subjective assessment of colour stability. This study evaluates a new objective measurement technique for translucent denture base materials, by comparing quantitative data with the results obtain...

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Veröffentlicht in:	Journal of oral rehabilitation 1995-06, Vol.22 (6), p.445-449
Hauptverfasser:	LIBERMAN, R., COMBE, E.C., PIDDOCK, V., PAWSON, C., WATTS, D.C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Acrylic Resins - chemistry Analysis of Variance Color - standards Colorimetry - instrumentation Colorimetry - methods Dentistry Denture Bases Light Prosthesis Coloring - standards Reproducibility of Results
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container_end_page	449
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container_title	Journal of oral rehabilitation
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creator	LIBERMAN, R. COMBE, E.C. PIDDOCK, V. PAWSON, C. WATTS, D.C.
description	SUMMARY Current standard specifications for the laboratory evaluation of denture base materials require subjective assessment of colour stability. This study evaluates a new objective measurement technique for translucent denture base materials, by comparing quantitative data with the results obtained from a standard subjective method. Preliminary work on three representative commercial acrylic materials resulted in the selection of a white background for the quantification of colour change of these translucent materials. One half of each sample was exposed to artificial sunlight for 24 h. The colour of both exposed and unexposed resin was measured on the CIE Lab* scale using a photoelectric colorimeter. Significant changes in the b* and E* values (P < 0.001) were observed following light exposure. Objective data for a wide range of commercial materials were compared with the results of a subjective evaluation and it was shown that a change in b* of 1.5 units was discernable subjectively by eye for 100% of the cases. It is suggested that this method and limit value could form the basis of a new objective colour change specification for polymeric dental materials.
doi_str_mv	10.1111/j.1365-2842.1995.tb00799.x
format	Article
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This study evaluates a new objective measurement technique for translucent denture base materials, by comparing quantitative data with the results obtained from a standard subjective method. Preliminary work on three representative commercial acrylic materials resulted in the selection of a white background for the quantification of colour change of these translucent materials. One half of each sample was exposed to artificial sunlight for 24 h. The colour of both exposed and unexposed resin was measured on the CIE Lab* scale using a photoelectric colorimeter. Significant changes in the b* and E* values (P < 0.001) were observed following light exposure. Objective data for a wide range of commercial materials were compared with the results of a subjective evaluation and it was shown that a change in b* of 1.5 units was discernable subjectively by eye for 100% of the cases. 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This study evaluates a new objective measurement technique for translucent denture base materials, by comparing quantitative data with the results obtained from a standard subjective method. Preliminary work on three representative commercial acrylic materials resulted in the selection of a white background for the quantification of colour change of these translucent materials. One half of each sample was exposed to artificial sunlight for 24 h. The colour of both exposed and unexposed resin was measured on the CIE Lab* scale using a photoelectric colorimeter. Significant changes in the b* and E* values (P < 0.001) were observed following light exposure. Objective data for a wide range of commercial materials were compared with the results of a subjective evaluation and it was shown that a change in b* of 1.5 units was discernable subjectively by eye for 100% of the cases. It is suggested that this method and limit value could form the basis of a new objective colour change specification for polymeric dental materials.</description><subject>Acrylic Resins - chemistry</subject><subject>Analysis of Variance</subject><subject>Color - standards</subject><subject>Colorimetry - instrumentation</subject><subject>Colorimetry - methods</subject><subject>Dentistry</subject><subject>Denture Bases</subject><subject>Light</subject><subject>Prosthesis Coloring - standards</subject><subject>Reproducibility of Results</subject><issn>0305-182X</issn><issn>1365-2842</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1995</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqVkF9v0zAUxS0E2srgIyBZe-AtwY7_JXtBqBuFalolxLS-WbZzw9IlcWcno_32JGvVd_xi-Zx7zrV-CF1SktLxfNmklEmRZDnPUloUIu0tIaoo0t0bNDtZb9GMMCISmmfrc_Q-xg0hJGdCnaEzJZmUVMxQdw0v0PhtC12PTVdiEyPE-Pr01ahgbzfg-voFcAv9oy8n2fnGDwG7R9P9mXQThwCvmcoHbFzYN7XD5SiMOrYmAg4Q6y5-QO8q00T4eLwv0P33m9_zH8ntavFz_u02cZzkIsnH33EpM-csUSJzUFaqUoYwC5kxFS-YpTQrJEguBLPMsZy7ilohFDUFLdkF-nzo3Qb_PEDsdVtHB01jOvBD1EpxrjgT4-DVYdAFH2OASm9D3Zqw15ToCbbe6ImonojqCbY-wta7MfzpuGWwLZSn6JHu6H89-H_rBvb_0ayXq9UvzqeG5NBQxx52pwYTnrRUTAn9cLfQy-X6Ti6yuV6zf0BAoIs</recordid><startdate>199506</startdate><enddate>199506</enddate><creator>LIBERMAN, R.</creator><creator>COMBE, E.C.</creator><creator>PIDDOCK, V.</creator><creator>PAWSON, C.</creator><creator>WATTS, D.C.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>199506</creationdate><title>Development and assessment of an objective method of colour change measurement for acrylic denture base resins</title><author>LIBERMAN, R. ; COMBE, E.C. ; PIDDOCK, V. ; PAWSON, C. ; WATTS, D.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4085-83664662ccb0752cedf7f7a03be2aaf493b11296e64553b3c384cf1b5571a91d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1995</creationdate><topic>Acrylic Resins - chemistry</topic><topic>Analysis of Variance</topic><topic>Color - standards</topic><topic>Colorimetry - instrumentation</topic><topic>Colorimetry - methods</topic><topic>Dentistry</topic><topic>Denture Bases</topic><topic>Light</topic><topic>Prosthesis Coloring - standards</topic><topic>Reproducibility of Results</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>LIBERMAN, R.</creatorcontrib><creatorcontrib>COMBE, E.C.</creatorcontrib><creatorcontrib>PIDDOCK, V.</creatorcontrib><creatorcontrib>PAWSON, C.</creatorcontrib><creatorcontrib>WATTS, D.C.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of oral rehabilitation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>LIBERMAN, R.</au><au>COMBE, E.C.</au><au>PIDDOCK, V.</au><au>PAWSON, C.</au><au>WATTS, D.C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Development and assessment of an objective method of colour change measurement for acrylic denture base resins</atitle><jtitle>Journal of oral rehabilitation</jtitle><addtitle>J Oral Rehabil</addtitle><date>1995-06</date><risdate>1995</risdate><volume>22</volume><issue>6</issue><spage>445</spage><epage>449</epage><pages>445-449</pages><issn>0305-182X</issn><eissn>1365-2842</eissn><abstract>SUMMARY Current standard specifications for the laboratory evaluation of denture base materials require subjective assessment of colour stability. This study evaluates a new objective measurement technique for translucent denture base materials, by comparing quantitative data with the results obtained from a standard subjective method. Preliminary work on three representative commercial acrylic materials resulted in the selection of a white background for the quantification of colour change of these translucent materials. One half of each sample was exposed to artificial sunlight for 24 h. The colour of both exposed and unexposed resin was measured on the CIE Lab* scale using a photoelectric colorimeter. Significant changes in the b* and E* values (P < 0.001) were observed following light exposure. Objective data for a wide range of commercial materials were compared with the results of a subjective evaluation and it was shown that a change in b* of 1.5 units was discernable subjectively by eye for 100% of the cases. It is suggested that this method and limit value could form the basis of a new objective colour change specification for polymeric dental materials.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>7636615</pmid><doi>10.1111/j.1365-2842.1995.tb00799.x</doi><tpages>5</tpages></addata></record>
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source	MEDLINE; Wiley Online Library All Journals
subjects	Acrylic Resins - chemistry Analysis of Variance Color - standards Colorimetry - instrumentation Colorimetry - methods Dentistry Denture Bases Light Prosthesis Coloring - standards Reproducibility of Results
title	Development and assessment of an objective method of colour change measurement for acrylic denture base resins
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