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Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism

Objectives. To investigate the correlation between frontal gaps and skeletal stability after intraoral vertical ramus osteotomy (IVRO) for correction of mandibular prognathism. Materials and Methods. Thirty-three patients with frontal gaps after IVRO-based mandibular prognathism correction were incl...

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Autores principales: Tseng, Yu-Chuan, Hsu, Kun-Jung, Chen, Ker-Kong, Wu, Ju-Hui, Chen, Chun-Ming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5059647/
https://www.ncbi.nlm.nih.gov/pubmed/27774457
http://dx.doi.org/10.1155/2016/7046361
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author Tseng, Yu-Chuan
Hsu, Kun-Jung
Chen, Ker-Kong
Wu, Ju-Hui
Chen, Chun-Ming
author_facet Tseng, Yu-Chuan
Hsu, Kun-Jung
Chen, Ker-Kong
Wu, Ju-Hui
Chen, Chun-Ming
author_sort Tseng, Yu-Chuan
collection PubMed
description Objectives. To investigate the correlation between frontal gaps and skeletal stability after intraoral vertical ramus osteotomy (IVRO) for correction of mandibular prognathism. Materials and Methods. Thirty-three patients with frontal gaps after IVRO-based mandibular prognathism correction were included. Three lateral and frontal cephalometric radiographs were obtained: preoperatively (T1), immediately postoperatively (T2), and 2 years postoperatively (T3). Two linear measurements (menton [Me] and frontal gap) were compared from T1 to T3 (T21: immediate surgical changes; T32: postoperative stability; T31: 2-year surgical change). Data were analyzed using Pearson's correlation coefficient and multiple linear regression. Results. The T21 mean surgical horizontal change in the Me position was 12.4 ± 4.23 mm. Vertically, the mean downward Me movement was 0.6 ± 1.73 mm. The mean frontal gaps were 4.7 ± 2.68 mm and 4 ± 2.48 mm in the right and left gonial regions, respectively. Postoperative stability (T32) significantly correlated with the amount of setback. Frontal gaps did not have a significant effect on postoperative stability. However, multiple regression model (R (2) = 0.341, P = 0.017) showed value predictability, especially in the amount of setback. Conclusion. Frontal gaps occur after IVRO but have no significant effect on long-term postoperative skeletal stability. The primary risk factor for postoperative relapse remains the amount of mandibular setback.
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spelling pubmed-50596472016-10-23 Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism Tseng, Yu-Chuan Hsu, Kun-Jung Chen, Ker-Kong Wu, Ju-Hui Chen, Chun-Ming Biomed Res Int Research Article Objectives. To investigate the correlation between frontal gaps and skeletal stability after intraoral vertical ramus osteotomy (IVRO) for correction of mandibular prognathism. Materials and Methods. Thirty-three patients with frontal gaps after IVRO-based mandibular prognathism correction were included. Three lateral and frontal cephalometric radiographs were obtained: preoperatively (T1), immediately postoperatively (T2), and 2 years postoperatively (T3). Two linear measurements (menton [Me] and frontal gap) were compared from T1 to T3 (T21: immediate surgical changes; T32: postoperative stability; T31: 2-year surgical change). Data were analyzed using Pearson's correlation coefficient and multiple linear regression. Results. The T21 mean surgical horizontal change in the Me position was 12.4 ± 4.23 mm. Vertically, the mean downward Me movement was 0.6 ± 1.73 mm. The mean frontal gaps were 4.7 ± 2.68 mm and 4 ± 2.48 mm in the right and left gonial regions, respectively. Postoperative stability (T32) significantly correlated with the amount of setback. Frontal gaps did not have a significant effect on postoperative stability. However, multiple regression model (R (2) = 0.341, P = 0.017) showed value predictability, especially in the amount of setback. Conclusion. Frontal gaps occur after IVRO but have no significant effect on long-term postoperative skeletal stability. The primary risk factor for postoperative relapse remains the amount of mandibular setback. Hindawi Publishing Corporation 2016 2016-09-27 /pmc/articles/PMC5059647/ /pubmed/27774457 http://dx.doi.org/10.1155/2016/7046361 Text en Copyright © 2016 Yu-Chuan Tseng et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Tseng, Yu-Chuan
Hsu, Kun-Jung
Chen, Ker-Kong
Wu, Ju-Hui
Chen, Chun-Ming
Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism
title Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism
title_full Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism
title_fullStr Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism
title_full_unstemmed Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism
title_short Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism
title_sort relationship between frontal gap and postoperative stability in the treatment of mandibular prognathism
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5059647/
https://www.ncbi.nlm.nih.gov/pubmed/27774457
http://dx.doi.org/10.1155/2016/7046361
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