Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures

Bibliographic Details
Main Author: Rodrigues,Renata Cristina Silveira
Publication Date: 2008
Other Authors: Macedo,Ana Paula, Torres,Érica Miranda de, Mattos,Maria da Glória Chiarello de, Ribeiro,Ricardo Faria
Format: Article
Language: eng
Source: Brazilian Dental Journal
Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402008000300006
Summary: The objective of this study was to evaluate the retention force of T-bar clasps made from commercially pure titanium (CP Ti) and cobalt-chromium (Co-Cr) alloy by the insertion/removal test simulating 5 years use. Thirty-six frameworks were cast from CP Ti (n=18) and Co-Cr alloy (n=18) with identical prefabricated patterns on refractory casts from a distal extension mandibular hemi-arch segment. The castings were made on a vacuum-pressure machine, under vacuum and argon atmosphere. Each group was subdivided in three, corresponding to 0.25 mm, 0.50 mm and 0.75 mm undercuts, respectively. No polishing procedures were performed to ensure uniformity. The specimens were subjected to an insertion/removal test and data was analyzed statistically to compare CP Ti and Co-Cr alloy in the same undercut (Student's t-test for independent samples) and each material in different undercuts (one-way ANOVA) (p=0.05). Comparisons between materials revealed significant differences (p=0.017) only for the 0.50-mm undercut. No significant differences (p>0.05) were found when comparing the same material for the undercuts. It may be concluded that for different undercuts, both Co-Cr alloy and CP Ti had no significant differences for T-bar clasps; CP Ti showed the lowest retention force values when compared to Co-Cr alloy in each undercut, but with significant difference only for the 0.50-mm undercut; and both materials maintained the retentive capacity during the simulation test.
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spelling Retention force of T-bar clasps for titanium and cobalt-chromium removable partial denturestitaniumdental claspsdenture retentiondenturepartialremovablechromium alloysThe objective of this study was to evaluate the retention force of T-bar clasps made from commercially pure titanium (CP Ti) and cobalt-chromium (Co-Cr) alloy by the insertion/removal test simulating 5 years use. Thirty-six frameworks were cast from CP Ti (n=18) and Co-Cr alloy (n=18) with identical prefabricated patterns on refractory casts from a distal extension mandibular hemi-arch segment. The castings were made on a vacuum-pressure machine, under vacuum and argon atmosphere. Each group was subdivided in three, corresponding to 0.25 mm, 0.50 mm and 0.75 mm undercuts, respectively. No polishing procedures were performed to ensure uniformity. The specimens were subjected to an insertion/removal test and data was analyzed statistically to compare CP Ti and Co-Cr alloy in the same undercut (Student's t-test for independent samples) and each material in different undercuts (one-way ANOVA) (p=0.05). Comparisons between materials revealed significant differences (p=0.017) only for the 0.50-mm undercut. No significant differences (p>0.05) were found when comparing the same material for the undercuts. It may be concluded that for different undercuts, both Co-Cr alloy and CP Ti had no significant differences for T-bar clasps; CP Ti showed the lowest retention force values when compared to Co-Cr alloy in each undercut, but with significant difference only for the 0.50-mm undercut; and both materials maintained the retentive capacity during the simulation test.Fundação Odontológica de Ribeirão Preto2008-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402008000300006Brazilian Dental Journal v.19 n.3 2008reponame:Brazilian Dental Journalinstname:Fundação Odontológica de Ribeirão Preto (FUNORP)instacron:FUNORP10.1590/S0103-64402008000300006info:eu-repo/semantics/openAccessRodrigues,Renata Cristina SilveiraMacedo,Ana PaulaTorres,Érica Miranda deMattos,Maria da Glória Chiarello deRibeiro,Ricardo Fariaeng2008-10-16T00:00:00Zoai:scielo:S0103-64402008000300006Revistahttps://www.scielo.br/j/bdj/https://old.scielo.br/oai/scielo-oai.phpbdj@forp.usp.br||sergio@fosjc.unesp.br1806-47600103-6440opendoar:2008-10-16T00:00Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)false
dc.title.none.fl_str_mv Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
title Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
spellingShingle Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
Rodrigues,Renata Cristina Silveira
titanium
dental clasps
denture retention
denture
partial
removable
chromium alloys
title_short Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
title_full Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
title_fullStr Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
title_full_unstemmed Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
title_sort Retention force of T-bar clasps for titanium and cobalt-chromium removable partial dentures
author Rodrigues,Renata Cristina Silveira
author_facet Rodrigues,Renata Cristina Silveira
Macedo,Ana Paula
Torres,Érica Miranda de
Mattos,Maria da Glória Chiarello de
Ribeiro,Ricardo Faria
author_role author
author2 Macedo,Ana Paula
Torres,Érica Miranda de
Mattos,Maria da Glória Chiarello de
Ribeiro,Ricardo Faria
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rodrigues,Renata Cristina Silveira
Macedo,Ana Paula
Torres,Érica Miranda de
Mattos,Maria da Glória Chiarello de
Ribeiro,Ricardo Faria
dc.subject.por.fl_str_mv titanium
dental clasps
denture retention
denture
partial
removable
chromium alloys
topic titanium
dental clasps
denture retention
denture
partial
removable
chromium alloys
description The objective of this study was to evaluate the retention force of T-bar clasps made from commercially pure titanium (CP Ti) and cobalt-chromium (Co-Cr) alloy by the insertion/removal test simulating 5 years use. Thirty-six frameworks were cast from CP Ti (n=18) and Co-Cr alloy (n=18) with identical prefabricated patterns on refractory casts from a distal extension mandibular hemi-arch segment. The castings were made on a vacuum-pressure machine, under vacuum and argon atmosphere. Each group was subdivided in three, corresponding to 0.25 mm, 0.50 mm and 0.75 mm undercuts, respectively. No polishing procedures were performed to ensure uniformity. The specimens were subjected to an insertion/removal test and data was analyzed statistically to compare CP Ti and Co-Cr alloy in the same undercut (Student's t-test for independent samples) and each material in different undercuts (one-way ANOVA) (p=0.05). Comparisons between materials revealed significant differences (p=0.017) only for the 0.50-mm undercut. No significant differences (p>0.05) were found when comparing the same material for the undercuts. It may be concluded that for different undercuts, both Co-Cr alloy and CP Ti had no significant differences for T-bar clasps; CP Ti showed the lowest retention force values when compared to Co-Cr alloy in each undercut, but with significant difference only for the 0.50-mm undercut; and both materials maintained the retentive capacity during the simulation test.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01
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=S0103-64402008000300006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402008000300006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-64402008000300006
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 Fundação Odontológica de Ribeirão Preto
publisher.none.fl_str_mv Fundação Odontológica de Ribeirão Preto
dc.source.none.fl_str_mv Brazilian Dental Journal v.19 n.3 2008
reponame:Brazilian Dental Journal
instname:Fundação Odontológica de Ribeirão Preto (FUNORP)
instacron:FUNORP
instname_str Fundação Odontológica de Ribeirão Preto (FUNORP)
instacron_str FUNORP
institution FUNORP
reponame_str Brazilian Dental Journal
collection Brazilian Dental Journal
repository.name.fl_str_mv Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)
repository.mail.fl_str_mv bdj@forp.usp.br||sergio@fosjc.unesp.br
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