Internal adaptation of cast titanium crowns
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of applied oral science (Online) |
Texto Completo: | https://www.revistas.usp.br/jaos/article/view/3471 |
Resumo: | As the adaptation of titanium crowns obtained by Rematitan Plus investment, specific for titanium, is not recognized to be suitable, this study evaluated the effect of the concentration of the specific liquid and the temperature of the mold of investments on the internal misfit of crowns cast on commercially pure titanium. Individual dies of epoxy resin were obtained, representing teeth prepared for full-crown restoration with a 6-degree axial surface convergence angle and shoulder (1.0 mm). For the waxing of each crown, a ring-shaped stainless steel matrix (8.0mm internal diameter; 7.5 mm height) was adapted above the individual dies of epoxy resin. The Rematian Plus investment was mixed according to the manufacturer's instructions using two different concentrations of the specific liquid: 100%, 75%. Casting was performed in a Discovery Plasma Ar-arc vacuum-pressure casting machine with molds at temperatures of 430ºC, 515ºC and 600ºC. The crowns were cleaned individually in a solution (1% HF + 13% HNO3) for 10 min using a ultrasonic cleaner, with no internal adaptations, and luted with zinc phosphate cement under a 5 kg static load. The crown and die assemblies were embedded in resin and sectioned longitudinally. The area occupied by cement was observed using stereoscopic lens (10X) and measured by the Leica Qwin image analysis system (mm²). The data for each experimental condition (n=8) were analyzed by Kruskal-Wallis non-parametric test (á=0.05). The results showed that liquid dilution and the increase in mold temperature did not significantly influence the levels of internal fit of the cast titanium crowns. The lowest means (±SD) of internal misfit were obtained for the 430ºC/100%: (7.25 mm² ±1.59) and 600ºC/100% (8.8 mm² ±2.25) groups, which presented statistically similar levels of internal misfit. |
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Internal adaptation of cast titanium crowns Dental casting investmentDental alloysTitanium As the adaptation of titanium crowns obtained by Rematitan Plus investment, specific for titanium, is not recognized to be suitable, this study evaluated the effect of the concentration of the specific liquid and the temperature of the mold of investments on the internal misfit of crowns cast on commercially pure titanium. Individual dies of epoxy resin were obtained, representing teeth prepared for full-crown restoration with a 6-degree axial surface convergence angle and shoulder (1.0 mm). For the waxing of each crown, a ring-shaped stainless steel matrix (8.0mm internal diameter; 7.5 mm height) was adapted above the individual dies of epoxy resin. The Rematian Plus investment was mixed according to the manufacturer's instructions using two different concentrations of the specific liquid: 100%, 75%. Casting was performed in a Discovery Plasma Ar-arc vacuum-pressure casting machine with molds at temperatures of 430ºC, 515ºC and 600ºC. The crowns were cleaned individually in a solution (1% HF + 13% HNO3) for 10 min using a ultrasonic cleaner, with no internal adaptations, and luted with zinc phosphate cement under a 5 kg static load. The crown and die assemblies were embedded in resin and sectioned longitudinally. The area occupied by cement was observed using stereoscopic lens (10X) and measured by the Leica Qwin image analysis system (mm²). The data for each experimental condition (n=8) were analyzed by Kruskal-Wallis non-parametric test (á=0.05). The results showed that liquid dilution and the increase in mold temperature did not significantly influence the levels of internal fit of the cast titanium crowns. The lowest means (±SD) of internal misfit were obtained for the 430ºC/100%: (7.25 mm² ±1.59) and 600ºC/100% (8.8 mm² ±2.25) groups, which presented statistically similar levels of internal misfit. Universidade de São Paulo. Faculdade de Odontologia de Bauru2007-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/347110.1590/S1678-77572007000400002Journal of Applied Oral Science; Vol. 15 No. 4 (2007); 247-252 Journal of Applied Oral Science; Vol. 15 Núm. 4 (2007); 247-252 Journal of Applied Oral Science; v. 15 n. 4 (2007); 247-252 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/3471/4161Copyright (c) 2007 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessRocha, Sicknan Soares daAdabo, Gelson LuisRibeiro, Ricardo FariaFonseca, Renata Garcia2012-04-27T11:57:34Zoai:revistas.usp.br:article/3471Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T11:57:34Journal of applied oral science (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Internal adaptation of cast titanium crowns |
title |
Internal adaptation of cast titanium crowns |
spellingShingle |
Internal adaptation of cast titanium crowns Rocha, Sicknan Soares da Dental casting investment Dental alloys Titanium |
title_short |
Internal adaptation of cast titanium crowns |
title_full |
Internal adaptation of cast titanium crowns |
title_fullStr |
Internal adaptation of cast titanium crowns |
title_full_unstemmed |
Internal adaptation of cast titanium crowns |
title_sort |
Internal adaptation of cast titanium crowns |
author |
Rocha, Sicknan Soares da |
author_facet |
Rocha, Sicknan Soares da Adabo, Gelson Luis Ribeiro, Ricardo Faria Fonseca, Renata Garcia |
author_role |
author |
author2 |
Adabo, Gelson Luis Ribeiro, Ricardo Faria Fonseca, Renata Garcia |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Rocha, Sicknan Soares da Adabo, Gelson Luis Ribeiro, Ricardo Faria Fonseca, Renata Garcia |
dc.subject.por.fl_str_mv |
Dental casting investment Dental alloys Titanium |
topic |
Dental casting investment Dental alloys Titanium |
description |
As the adaptation of titanium crowns obtained by Rematitan Plus investment, specific for titanium, is not recognized to be suitable, this study evaluated the effect of the concentration of the specific liquid and the temperature of the mold of investments on the internal misfit of crowns cast on commercially pure titanium. Individual dies of epoxy resin were obtained, representing teeth prepared for full-crown restoration with a 6-degree axial surface convergence angle and shoulder (1.0 mm). For the waxing of each crown, a ring-shaped stainless steel matrix (8.0mm internal diameter; 7.5 mm height) was adapted above the individual dies of epoxy resin. The Rematian Plus investment was mixed according to the manufacturer's instructions using two different concentrations of the specific liquid: 100%, 75%. Casting was performed in a Discovery Plasma Ar-arc vacuum-pressure casting machine with molds at temperatures of 430ºC, 515ºC and 600ºC. The crowns were cleaned individually in a solution (1% HF + 13% HNO3) for 10 min using a ultrasonic cleaner, with no internal adaptations, and luted with zinc phosphate cement under a 5 kg static load. The crown and die assemblies were embedded in resin and sectioned longitudinally. The area occupied by cement was observed using stereoscopic lens (10X) and measured by the Leica Qwin image analysis system (mm²). The data for each experimental condition (n=8) were analyzed by Kruskal-Wallis non-parametric test (á=0.05). The results showed that liquid dilution and the increase in mold temperature did not significantly influence the levels of internal fit of the cast titanium crowns. The lowest means (±SD) of internal misfit were obtained for the 430ºC/100%: (7.25 mm² ±1.59) and 600ºC/100% (8.8 mm² ±2.25) groups, which presented statistically similar levels of internal misfit. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/3471 10.1590/S1678-77572007000400002 |
url |
https://www.revistas.usp.br/jaos/article/view/3471 |
identifier_str_mv |
10.1590/S1678-77572007000400002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/3471/4161 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2007 Journal of Applied Oral Science info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2007 Journal of Applied Oral Science |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
dc.source.none.fl_str_mv |
Journal of Applied Oral Science; Vol. 15 No. 4 (2007); 247-252 Journal of Applied Oral Science; Vol. 15 Núm. 4 (2007); 247-252 Journal of Applied Oral Science; v. 15 n. 4 (2007); 247-252 1678-7765 1678-7757 reponame:Journal of applied oral science (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Journal of applied oral science (Online) |
collection |
Journal of applied oral science (Online) |
repository.name.fl_str_mv |
Journal of applied oral science (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
||jaos@usp.br |
_version_ |
1800221673463480320 |