Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Dental Journal |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000100002 |
Resumo: | This study evaluated the influence of retorque on loosening torque (Lt) of prosthetic screws in implant-supported dentures with different fit levels. Ten mandibular implant-supported dentures were fabricated and then 20 cast models were then prepared using prosthetic structures to create 2 fit levels: passive fit (Pf) and misfit (Mf). Two tightening techniques were also evaluated: initial torque only (T1); and initial torque and retorque after 10 min (T2). Gold or titanium screws were used, resulting in 4 groups to each one: Pf/T1, Pf/T2, Mf/T1, Mf/T2. The Lt was measured 24 h after the tightening torque using digital torque meter. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05), separately for each screw material. For titanium screws, no significant difference (p>0.05) was found between Pf/T1 and Pf/T2, or between Pf/T2 and Mf/T2. However, statistically significant difference (p<0.05) was found between Pf/T1 and Mf/T1, and between Mf/T1 and Mf/T2. Mf reduced the Lt using T1, while and T2 increased the Lt for Mf. Retorque and fit were shown to have no significant influence on the Lt of the gold screws. Retorque application made insignificant the misfit effect on the Lt of the titanium screws, suggesting that this procedure should be performed routinely during the screw tightening in multi-unit dentures. |
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Brazilian Dental Journal |
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Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported denturesimplant prosthesismisfitretorqueprosthetic screwloosening torqueThis study evaluated the influence of retorque on loosening torque (Lt) of prosthetic screws in implant-supported dentures with different fit levels. Ten mandibular implant-supported dentures were fabricated and then 20 cast models were then prepared using prosthetic structures to create 2 fit levels: passive fit (Pf) and misfit (Mf). Two tightening techniques were also evaluated: initial torque only (T1); and initial torque and retorque after 10 min (T2). Gold or titanium screws were used, resulting in 4 groups to each one: Pf/T1, Pf/T2, Mf/T1, Mf/T2. The Lt was measured 24 h after the tightening torque using digital torque meter. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05), separately for each screw material. For titanium screws, no significant difference (p>0.05) was found between Pf/T1 and Pf/T2, or between Pf/T2 and Mf/T2. However, statistically significant difference (p<0.05) was found between Pf/T1 and Mf/T1, and between Mf/T1 and Mf/T2. Mf reduced the Lt using T1, while and T2 increased the Lt for Mf. Retorque and fit were shown to have no significant influence on the Lt of the gold screws. Retorque application made insignificant the misfit effect on the Lt of the titanium screws, suggesting that this procedure should be performed routinely during the screw tightening in multi-unit dentures.Fundação Odontológica de Ribeirão Preto2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000100002Brazilian Dental Journal v.21 n.1 2010reponame:Brazilian Dental Journalinstname:Fundação Odontológica de Ribeirão Preto (FUNORP)instacron:FUNORP10.1590/S0103-64402010000100002info:eu-repo/semantics/openAccessSpazzin,Aloísio OroHenrique,Guilherme Elias PessanhaNóbilo,Mauro Antônio de ArrudaConsani,Rafael Leonardo XediekCorrer-Sobrinho,LourençoMesquita,Marcelo Ferrazeng2010-05-04T00:00:00Zoai:scielo:S0103-64402010000100002Revistahttps://www.scielo.br/j/bdj/https://old.scielo.br/oai/scielo-oai.phpbdj@forp.usp.br||sergio@fosjc.unesp.br1806-47600103-6440opendoar:2010-05-04T00:00Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)false |
dc.title.none.fl_str_mv |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures |
title |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures |
spellingShingle |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures Spazzin,Aloísio Oro implant prosthesis misfit retorque prosthetic screw loosening torque |
title_short |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures |
title_full |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures |
title_fullStr |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures |
title_full_unstemmed |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures |
title_sort |
Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures |
author |
Spazzin,Aloísio Oro |
author_facet |
Spazzin,Aloísio Oro Henrique,Guilherme Elias Pessanha Nóbilo,Mauro Antônio de Arruda Consani,Rafael Leonardo Xediek Correr-Sobrinho,Lourenço Mesquita,Marcelo Ferraz |
author_role |
author |
author2 |
Henrique,Guilherme Elias Pessanha Nóbilo,Mauro Antônio de Arruda Consani,Rafael Leonardo Xediek Correr-Sobrinho,Lourenço Mesquita,Marcelo Ferraz |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Spazzin,Aloísio Oro Henrique,Guilherme Elias Pessanha Nóbilo,Mauro Antônio de Arruda Consani,Rafael Leonardo Xediek Correr-Sobrinho,Lourenço Mesquita,Marcelo Ferraz |
dc.subject.por.fl_str_mv |
implant prosthesis misfit retorque prosthetic screw loosening torque |
topic |
implant prosthesis misfit retorque prosthetic screw loosening torque |
description |
This study evaluated the influence of retorque on loosening torque (Lt) of prosthetic screws in implant-supported dentures with different fit levels. Ten mandibular implant-supported dentures were fabricated and then 20 cast models were then prepared using prosthetic structures to create 2 fit levels: passive fit (Pf) and misfit (Mf). Two tightening techniques were also evaluated: initial torque only (T1); and initial torque and retorque after 10 min (T2). Gold or titanium screws were used, resulting in 4 groups to each one: Pf/T1, Pf/T2, Mf/T1, Mf/T2. The Lt was measured 24 h after the tightening torque using digital torque meter. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05), separately for each screw material. For titanium screws, no significant difference (p>0.05) was found between Pf/T1 and Pf/T2, or between Pf/T2 and Mf/T2. However, statistically significant difference (p<0.05) was found between Pf/T1 and Mf/T1, and between Mf/T1 and Mf/T2. Mf reduced the Lt using T1, while and T2 increased the Lt for Mf. Retorque and fit were shown to have no significant influence on the Lt of the gold screws. Retorque application made insignificant the misfit effect on the Lt of the titanium screws, suggesting that this procedure should be performed routinely during the screw tightening in multi-unit dentures. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 |
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=S0103-64402010000100002 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000100002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-64402010000100002 |
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.21 n.1 2010 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 |
_version_ |
1754204091299397632 |