Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy

Abstract Intraoral vertical ramus osteotomy (IVRO) is used to treat mandibular prognathism and temporomandibular disorders. However, the improvement of temporomandibular disorders after IVRO is considered to be due to the anterior and downward movement of the mandibular condyle, which may lead to co...

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Autores principales:	Satoshi Rokutanda, Shin-Ichi Yamada, Souichi Yanamoto, Hiroshi Sakamoto, Keisuke Omori, Hiromi Rokutanda, Tomoko Yoshimi, Ayumi Fujishita, Yukiko Morita, Noriaki Yoshida, Masahiro Umeda
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bece2fe49c514a4baad539b9cc3e0e3c
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spelling	oai:doaj.org-article:bece2fe49c514a4baad539b9cc3e0e3c2021-12-02T16:51:14ZPredisposing conditions for condylar sag after intraoral vertical ramus osteotomy10.1038/s41598-021-89968-w2045-2322https://doaj.org/article/bece2fe49c514a4baad539b9cc3e0e3c2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89968-whttps://doaj.org/toc/2045-2322Abstract Intraoral vertical ramus osteotomy (IVRO) is used to treat mandibular prognathism and temporomandibular disorders. However, the improvement of temporomandibular disorders after IVRO is considered to be due to the anterior and downward movement of the mandibular condyle, which may lead to condylar sag, and in the worst case, condylar luxation. In this retrospective cohort study, we examined factors potentially associated with condylar sag. Univariate analysis indicated that condylar sag was significantly associated with the following factors: magnitude of setback (P = 0.001), less than 3 mm setback (P < 0.001), presence of temporomandibular joint (TMJ) symptoms (P = 0.002), Wilkes classification (P = 0.039), occlusal cant correction ≥ 2 mm (P = 0.018), and mandibular condyle deformation (P < 0.001). Setback magnitude (P = 0.032) and TMJ symptoms (P = 0.007) remained significant in the multivariate analysis. In the receiver operating characteristic curve, the setback magnitude cut-off value for condylar sag after IVRO was 3.25 mm. Thus, the incidence of condylar sag after IVRO is increased with a smaller setback magnitude (≤ 3.25 mm) and the presence of TMJ symptoms. These factors should be evaluated by surgeons during treatment planning for IVRO to estimate condylar sag, and it may be possible to predict the risk of condylar luxation.Satoshi RokutandaShin-Ichi YamadaSouichi YanamotoHiroshi SakamotoKeisuke OmoriHiromi RokutandaTomoko YoshimiAyumi FujishitaYukiko MoritaNoriaki YoshidaMasahiro UmedaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Satoshi Rokutanda Shin-Ichi Yamada Souichi Yanamoto Hiroshi Sakamoto Keisuke Omori Hiromi Rokutanda Tomoko Yoshimi Ayumi Fujishita Yukiko Morita Noriaki Yoshida Masahiro Umeda Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy
description	Abstract Intraoral vertical ramus osteotomy (IVRO) is used to treat mandibular prognathism and temporomandibular disorders. However, the improvement of temporomandibular disorders after IVRO is considered to be due to the anterior and downward movement of the mandibular condyle, which may lead to condylar sag, and in the worst case, condylar luxation. In this retrospective cohort study, we examined factors potentially associated with condylar sag. Univariate analysis indicated that condylar sag was significantly associated with the following factors: magnitude of setback (P = 0.001), less than 3 mm setback (P < 0.001), presence of temporomandibular joint (TMJ) symptoms (P = 0.002), Wilkes classification (P = 0.039), occlusal cant correction ≥ 2 mm (P = 0.018), and mandibular condyle deformation (P < 0.001). Setback magnitude (P = 0.032) and TMJ symptoms (P = 0.007) remained significant in the multivariate analysis. In the receiver operating characteristic curve, the setback magnitude cut-off value for condylar sag after IVRO was 3.25 mm. Thus, the incidence of condylar sag after IVRO is increased with a smaller setback magnitude (≤ 3.25 mm) and the presence of TMJ symptoms. These factors should be evaluated by surgeons during treatment planning for IVRO to estimate condylar sag, and it may be possible to predict the risk of condylar luxation.
format	article
author	Satoshi Rokutanda Shin-Ichi Yamada Souichi Yanamoto Hiroshi Sakamoto Keisuke Omori Hiromi Rokutanda Tomoko Yoshimi Ayumi Fujishita Yukiko Morita Noriaki Yoshida Masahiro Umeda
author_facet	Satoshi Rokutanda Shin-Ichi Yamada Souichi Yanamoto Hiroshi Sakamoto Keisuke Omori Hiromi Rokutanda Tomoko Yoshimi Ayumi Fujishita Yukiko Morita Noriaki Yoshida Masahiro Umeda
author_sort	Satoshi Rokutanda
title	Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy
title_short	Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy
title_full	Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy
title_fullStr	Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy
title_full_unstemmed	Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy
title_sort	predisposing conditions for condylar sag after intraoral vertical ramus osteotomy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/bece2fe49c514a4baad539b9cc3e0e3c
work_keys_str_mv	AT satoshirokutanda predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT shinichiyamada predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT souichiyanamoto predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT hiroshisakamoto predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT keisukeomori predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT hiromirokutanda predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT tomokoyoshimi predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT ayumifujishita predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT yukikomorita predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT noriakiyoshida predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy AT masahiroumeda predisposingconditionsforcondylarsagafterintraoralverticalramusosteotomy
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Predisposing conditions for condylar sag after intraoral vertical ramus osteotomy

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