Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date

Detalhes bibliográficos
Autor(a) principal: Tirapelli,Camila
Data de Publicação: 2004
Outros Autores: Panzeri,Fernanda de Carvalho, Panzeri,Heitor, Pardini,Luiz Carlos, Zaniquelli,Osvaldo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300006
Resumo: This study observed alteration in the radiopacity and microhardness of expired resin-based materials compared to non-expired materials and the operating characteristics of the X-ray source used. Five 2 mm-thick cured specimens were prepared for each material: composite resins (P60®, Z100®), and a compomer (Dyract AP®). Radiopacity of the specimens was evaluated comparing the density of the resin-based material to an equivalent (mm) density of a 99.5% pure aluminum step wedge using a transmission densitometer. Surface microhardness measurements were carried out using a calibrated Vickers indenter on three different points of the same surface. ANOVA and Tukey tests (pre-set alpha = 0.05) revealed that expired materials showed no significant change in radiopacity. One material (Filtek P60) demonstrated lower radiopacity with lower KVp. Change in microhardness wa s statistically significant for Z100: for this material, the microhardness after expiration was significantly lower than before the expiration date.
id ABMABCABPOL-1_4608e8986d59c905282a2b60423e842b
oai_identifier_str oai:scielo:S1516-14392004000300006
network_acronym_str ABMABCABPOL-1
network_name_str Materials research (São Carlos. Online)
repository_id_str
spelling Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration dateradiopacityexpiration datecompositesoperating voltagemicrohardnessThis study observed alteration in the radiopacity and microhardness of expired resin-based materials compared to non-expired materials and the operating characteristics of the X-ray source used. Five 2 mm-thick cured specimens were prepared for each material: composite resins (P60®, Z100®), and a compomer (Dyract AP®). Radiopacity of the specimens was evaluated comparing the density of the resin-based material to an equivalent (mm) density of a 99.5% pure aluminum step wedge using a transmission densitometer. Surface microhardness measurements were carried out using a calibrated Vickers indenter on three different points of the same surface. ANOVA and Tukey tests (pre-set alpha = 0.05) revealed that expired materials showed no significant change in radiopacity. One material (Filtek P60) demonstrated lower radiopacity with lower KVp. Change in microhardness wa s statistically significant for Z100: for this material, the microhardness after expiration was significantly lower than before the expiration date.ABM, ABC, ABPol2004-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300006Materials Research v.7 n.3 2004reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392004000300006info:eu-repo/semantics/openAccessTirapelli,CamilaPanzeri,Fernanda de CarvalhoPanzeri,HeitorPardini,Luiz CarlosZaniquelli,Osvaldoeng2004-08-16T00:00:00Zoai:scielo:S1516-14392004000300006Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2004-08-16T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
title Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
spellingShingle Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
Tirapelli,Camila
radiopacity
expiration date
composites
operating voltage
microhardness
title_short Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
title_full Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
title_fullStr Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
title_full_unstemmed Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
title_sort Radiopacity and microhardness changes and effect of X-ray operating voltage in resin-based materials before and after the expiration date
author Tirapelli,Camila
author_facet Tirapelli,Camila
Panzeri,Fernanda de Carvalho
Panzeri,Heitor
Pardini,Luiz Carlos
Zaniquelli,Osvaldo
author_role author
author2 Panzeri,Fernanda de Carvalho
Panzeri,Heitor
Pardini,Luiz Carlos
Zaniquelli,Osvaldo
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Tirapelli,Camila
Panzeri,Fernanda de Carvalho
Panzeri,Heitor
Pardini,Luiz Carlos
Zaniquelli,Osvaldo
dc.subject.por.fl_str_mv radiopacity
expiration date
composites
operating voltage
microhardness
topic radiopacity
expiration date
composites
operating voltage
microhardness
description This study observed alteration in the radiopacity and microhardness of expired resin-based materials compared to non-expired materials and the operating characteristics of the X-ray source used. Five 2 mm-thick cured specimens were prepared for each material: composite resins (P60®, Z100®), and a compomer (Dyract AP®). Radiopacity of the specimens was evaluated comparing the density of the resin-based material to an equivalent (mm) density of a 99.5% pure aluminum step wedge using a transmission densitometer. Surface microhardness measurements were carried out using a calibrated Vickers indenter on three different points of the same surface. ANOVA and Tukey tests (pre-set alpha = 0.05) revealed that expired materials showed no significant change in radiopacity. One material (Filtek P60) demonstrated lower radiopacity with lower KVp. Change in microhardness wa s statistically significant for Z100: for this material, the microhardness after expiration was significantly lower than before the expiration date.
publishDate 2004
dc.date.none.fl_str_mv 2004-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392004000300006
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.7 n.3 2004
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
_version_ 1754212657732255744

Registros relacionados