Reliability of a Centroid method to estimate head position in cephalometric diagnosis
ABSTRACT Objective The objective of this study was to 1) evaluate the reproducibility of natural head position (NHP) in different professional groups; 2) compare three cephalometric methods of estimating head position to the established natural head position and 3) investigate the applicability of a new method to estimated head position using a Centroid method. Methods The sample consisted of 105 individual cephalometric tracings and photographs. For the first evaluation, copies of the lateral photographs were reproduced for each patient and 3 professionals with different expertise (experienced orthodontists, orthodontic students and orthognatic surgeon) were instructed to position the photographs in NHP. Later, 3 different methods to obtain NHP were assessed: 1) the Frankfort Horizontal Plane (FRANK), 2) Sella-Nasion 7º Line (SN7) and 3) proposed Horizontal Reference Line based on Centroid. Angles formed by the evaluated planes/lines and True Vertical Line obtained were measured. Gender and skeletal discrepancy were considered. Results The results showed a significant difference between NHP obtained from orthodontists and surgeons compared to students (p<0.0001). Also results showed no effect of skeletal classification and gender did on measurement (p>0.05). Both SN minus 7º and FRANK methods showed a high variability (p < 0,01) compared to Centroid method. Conclusion NHP may be affected by the professional experience. The proposed horizontal line based on Centroid is a valid method for estimating head position, thus, may be indicated to use as a diagnostic tool in Orthodontics and Orthognatic Surgery.
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Faculdade São Leopoldo Mandic
2020
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oai:scielo:S1981-863720200001003262020-10-02Reliability of a Centroid method to estimate head position in cephalometric diagnosisSUZUKI,HideoSUZUKI,Selly SayuriGARCEZ,Aguinaldo SilvaCARVALHAES,Juliana MandelloFUJII,Denise NamiLIMA-ARSATI,Ynara Bosco Orthodontics Diagnosis Orthognatic surgery ABSTRACT Objective The objective of this study was to 1) evaluate the reproducibility of natural head position (NHP) in different professional groups; 2) compare three cephalometric methods of estimating head position to the established natural head position and 3) investigate the applicability of a new method to estimated head position using a Centroid method. Methods The sample consisted of 105 individual cephalometric tracings and photographs. For the first evaluation, copies of the lateral photographs were reproduced for each patient and 3 professionals with different expertise (experienced orthodontists, orthodontic students and orthognatic surgeon) were instructed to position the photographs in NHP. Later, 3 different methods to obtain NHP were assessed: 1) the Frankfort Horizontal Plane (FRANK), 2) Sella-Nasion 7º Line (SN7) and 3) proposed Horizontal Reference Line based on Centroid. Angles formed by the evaluated planes/lines and True Vertical Line obtained were measured. Gender and skeletal discrepancy were considered. Results The results showed a significant difference between NHP obtained from orthodontists and surgeons compared to students (p<0.0001). Also results showed no effect of skeletal classification and gender did on measurement (p>0.05). Both SN minus 7º and FRANK methods showed a high variability (p < 0,01) compared to Centroid method. Conclusion NHP may be affected by the professional experience. The proposed horizontal line based on Centroid is a valid method for estimating head position, thus, may be indicated to use as a diagnostic tool in Orthodontics and Orthognatic Surgery.info:eu-repo/semantics/openAccessFaculdade São Leopoldo MandicRGO - Revista Gaúcha de Odontologia v.68 20202020-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1981-86372020000100326en10.1590/1981-863720200004520190017 |
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SUZUKI,Hideo SUZUKI,Selly Sayuri GARCEZ,Aguinaldo Silva CARVALHAES,Juliana Mandello FUJII,Denise Nami LIMA-ARSATI,Ynara Bosco |
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SUZUKI,Hideo SUZUKI,Selly Sayuri GARCEZ,Aguinaldo Silva CARVALHAES,Juliana Mandello FUJII,Denise Nami LIMA-ARSATI,Ynara Bosco Reliability of a Centroid method to estimate head position in cephalometric diagnosis |
author_facet |
SUZUKI,Hideo SUZUKI,Selly Sayuri GARCEZ,Aguinaldo Silva CARVALHAES,Juliana Mandello FUJII,Denise Nami LIMA-ARSATI,Ynara Bosco |
author_sort |
SUZUKI,Hideo |
title |
Reliability of a Centroid method to estimate head position in cephalometric diagnosis |
title_short |
Reliability of a Centroid method to estimate head position in cephalometric diagnosis |
title_full |
Reliability of a Centroid method to estimate head position in cephalometric diagnosis |
title_fullStr |
Reliability of a Centroid method to estimate head position in cephalometric diagnosis |
title_full_unstemmed |
Reliability of a Centroid method to estimate head position in cephalometric diagnosis |
title_sort |
reliability of a centroid method to estimate head position in cephalometric diagnosis |
description |
ABSTRACT Objective The objective of this study was to 1) evaluate the reproducibility of natural head position (NHP) in different professional groups; 2) compare three cephalometric methods of estimating head position to the established natural head position and 3) investigate the applicability of a new method to estimated head position using a Centroid method. Methods The sample consisted of 105 individual cephalometric tracings and photographs. For the first evaluation, copies of the lateral photographs were reproduced for each patient and 3 professionals with different expertise (experienced orthodontists, orthodontic students and orthognatic surgeon) were instructed to position the photographs in NHP. Later, 3 different methods to obtain NHP were assessed: 1) the Frankfort Horizontal Plane (FRANK), 2) Sella-Nasion 7º Line (SN7) and 3) proposed Horizontal Reference Line based on Centroid. Angles formed by the evaluated planes/lines and True Vertical Line obtained were measured. Gender and skeletal discrepancy were considered. Results The results showed a significant difference between NHP obtained from orthodontists and surgeons compared to students (p<0.0001). Also results showed no effect of skeletal classification and gender did on measurement (p>0.05). Both SN minus 7º and FRANK methods showed a high variability (p < 0,01) compared to Centroid method. Conclusion NHP may be affected by the professional experience. The proposed horizontal line based on Centroid is a valid method for estimating head position, thus, may be indicated to use as a diagnostic tool in Orthodontics and Orthognatic Surgery. |
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Faculdade São Leopoldo Mandic |
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2020 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1981-86372020000100326 |
work_keys_str_mv |
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