Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Dental Press Journal of Orthodontics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512013000100024 |
Resumo: | OBJECTIVE: The purpose of this study was to compare dental size measurements, their reproducibility and the application of Tanaka and Johnston regression equation in predicting the size of canines and premolars on plaster and digital dental casts. METHODS: Thirty plaster casts were scanned and digitized. Mesiodistal measurements of the teeth were then performed with a digital caliper on the plaster and digital casts using O3d software system (Widialabs©).The sum of the sizes of the lower incisors was used to obtain predictive values of the sizes of the premolars and canines using the regression equation, and these values were compared with the actual sizes of the teeth. The data were statistically analyzed by applying to the results Pearson's correlation test, Dahlberg's formula, paired t-test and analysis of variance (p<0.05). RESULTS: Excellent intraexaminer agreement was observed in the measurements performed on both dental casts. No random error was present in the measurements obtained with the caliper and systematic error (bias) was more frequent in the digital casts. Space prediction obtained by applying the regression equation was greater than the sum of the canines and premolars on the plaster and digital casts. CONCLUSIONS: Despite an adequate reproducibility of the measurements performed on both casts, most measurements on the digital casts were higher than those on the plaster casts. The predicted space was overestimated in both models and significantly higher in the digital casts. |
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Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equationThree-dimensional imageDental castsTest reproducibilityOBJECTIVE: The purpose of this study was to compare dental size measurements, their reproducibility and the application of Tanaka and Johnston regression equation in predicting the size of canines and premolars on plaster and digital dental casts. METHODS: Thirty plaster casts were scanned and digitized. Mesiodistal measurements of the teeth were then performed with a digital caliper on the plaster and digital casts using O3d software system (Widialabs©).The sum of the sizes of the lower incisors was used to obtain predictive values of the sizes of the premolars and canines using the regression equation, and these values were compared with the actual sizes of the teeth. The data were statistically analyzed by applying to the results Pearson's correlation test, Dahlberg's formula, paired t-test and analysis of variance (p<0.05). RESULTS: Excellent intraexaminer agreement was observed in the measurements performed on both dental casts. No random error was present in the measurements obtained with the caliper and systematic error (bias) was more frequent in the digital casts. Space prediction obtained by applying the regression equation was greater than the sum of the canines and premolars on the plaster and digital casts. CONCLUSIONS: Despite an adequate reproducibility of the measurements performed on both casts, most measurements on the digital casts were higher than those on the plaster casts. The predicted space was overestimated in both models and significantly higher in the digital casts.Dental Press International2013-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512013000100024Dental Press Journal of Orthodontics v.18 n.1 2013reponame:Dental Press Journal of Orthodonticsinstname:Dental Press International (DPI)instacron:DPI10.1590/S2176-94512013000100024info:eu-repo/semantics/openAccessSanches,Júlia OlienSantos-Pinto,Lourdes Aparecida Martins dosSantos-Pinto,Ary dosGrehs,BetinaJeremias,Fabianoeng2013-05-15T00:00:00Zoai:scielo:S2176-94512013000100024Revistahttp://www.scielo.br/dpjoONGhttps://old.scielo.br/oai/scielo-oai.phpartigos@dentalpress.com.br||davidnormando@hotmail.com2177-67092176-9451opendoar:2013-05-15T00:00Dental Press Journal of Orthodontics - Dental Press International (DPI)false |
dc.title.none.fl_str_mv |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation |
title |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation |
spellingShingle |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation Sanches,Júlia Olien Three-dimensional image Dental casts Test reproducibility |
title_short |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation |
title_full |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation |
title_fullStr |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation |
title_full_unstemmed |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation |
title_sort |
Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation |
author |
Sanches,Júlia Olien |
author_facet |
Sanches,Júlia Olien Santos-Pinto,Lourdes Aparecida Martins dos Santos-Pinto,Ary dos Grehs,Betina Jeremias,Fabiano |
author_role |
author |
author2 |
Santos-Pinto,Lourdes Aparecida Martins dos Santos-Pinto,Ary dos Grehs,Betina Jeremias,Fabiano |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Sanches,Júlia Olien Santos-Pinto,Lourdes Aparecida Martins dos Santos-Pinto,Ary dos Grehs,Betina Jeremias,Fabiano |
dc.subject.por.fl_str_mv |
Three-dimensional image Dental casts Test reproducibility |
topic |
Three-dimensional image Dental casts Test reproducibility |
description |
OBJECTIVE: The purpose of this study was to compare dental size measurements, their reproducibility and the application of Tanaka and Johnston regression equation in predicting the size of canines and premolars on plaster and digital dental casts. METHODS: Thirty plaster casts were scanned and digitized. Mesiodistal measurements of the teeth were then performed with a digital caliper on the plaster and digital casts using O3d software system (Widialabs©).The sum of the sizes of the lower incisors was used to obtain predictive values of the sizes of the premolars and canines using the regression equation, and these values were compared with the actual sizes of the teeth. The data were statistically analyzed by applying to the results Pearson's correlation test, Dahlberg's formula, paired t-test and analysis of variance (p<0.05). RESULTS: Excellent intraexaminer agreement was observed in the measurements performed on both dental casts. No random error was present in the measurements obtained with the caliper and systematic error (bias) was more frequent in the digital casts. Space prediction obtained by applying the regression equation was greater than the sum of the canines and premolars on the plaster and digital casts. CONCLUSIONS: Despite an adequate reproducibility of the measurements performed on both casts, most measurements on the digital casts were higher than those on the plaster casts. The predicted space was overestimated in both models and significantly higher in the digital casts. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-02-01 |
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=S2176-94512013000100024 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512013000100024 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S2176-94512013000100024 |
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 |
Dental Press International |
publisher.none.fl_str_mv |
Dental Press International |
dc.source.none.fl_str_mv |
Dental Press Journal of Orthodontics v.18 n.1 2013 reponame:Dental Press Journal of Orthodontics instname:Dental Press International (DPI) instacron:DPI |
instname_str |
Dental Press International (DPI) |
instacron_str |
DPI |
institution |
DPI |
reponame_str |
Dental Press Journal of Orthodontics |
collection |
Dental Press Journal of Orthodontics |
repository.name.fl_str_mv |
Dental Press Journal of Orthodontics - Dental Press International (DPI) |
repository.mail.fl_str_mv |
artigos@dentalpress.com.br||davidnormando@hotmail.com |
_version_ |
1754122396389867520 |