Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study

The lateral pterygoid muscle (LPM) is important in the physiology and dysfunction of the temporomandibular joint (TMJ), which has described the presence of a third head in the lateral pterygoid muscle (THLPM). The purpose of this study was to evaluate the prevalence of THLPM and its relationship wit...

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Autores principales:	Pompei Filho,Horácio, Guimarães,Antonio Sergio, Suazo Galdames,Iván Claudio
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2009
Materias:	Lateral pterygoid muscle Temporomandibular joint Articular disc Temporomandibular dysfunction
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400014
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spelling	oai:scielo:S0717-950220090004000142010-05-18Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image StudyPompei Filho,HorácioGuimarães,Antonio SergioSuazo Galdames,Iván Claudio Lateral pterygoid muscle Temporomandibular joint Articular disc Temporomandibular dysfunction The lateral pterygoid muscle (LPM) is important in the physiology and dysfunction of the temporomandibular joint (TMJ), which has described the presence of a third head in the lateral pterygoid muscle (THLPM). The purpose of this study was to evaluate the prevalence of THLPM and its relationship with the TMJ disc through magnetic resonance imaging (MRI). It was evaluated 178 MRI of the TMJ of healthy individuals, in images that presented THLPM, and these were defined and measured at the surface inserted into the disc. The prevalence of THLPM was 20.22% (n = 36). Insertion of THLPM was made entirely on the TMJ disc, the average area of insertion was 4.14mm (SD 1.35) in women and 4.67 (SD 2.68) in men, but these differences were not significant. We concluded that the LPM has a complex structure, and that a THLPM could contribute in the development of TMJ disc function alterations and anterior disc displacement.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.27 n.4 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400014en10.4067/S0717-95022009000400014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Lateral pterygoid muscle Temporomandibular joint Articular disc Temporomandibular dysfunction
spellingShingle	Lateral pterygoid muscle Temporomandibular joint Articular disc Temporomandibular dysfunction Pompei Filho,Horácio Guimarães,Antonio Sergio Suazo Galdames,Iván Claudio Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study
description	The lateral pterygoid muscle (LPM) is important in the physiology and dysfunction of the temporomandibular joint (TMJ), which has described the presence of a third head in the lateral pterygoid muscle (THLPM). The purpose of this study was to evaluate the prevalence of THLPM and its relationship with the TMJ disc through magnetic resonance imaging (MRI). It was evaluated 178 MRI of the TMJ of healthy individuals, in images that presented THLPM, and these were defined and measured at the surface inserted into the disc. The prevalence of THLPM was 20.22% (n = 36). Insertion of THLPM was made entirely on the TMJ disc, the average area of insertion was 4.14mm (SD 1.35) in women and 4.67 (SD 2.68) in men, but these differences were not significant. We concluded that the LPM has a complex structure, and that a THLPM could contribute in the development of TMJ disc function alterations and anterior disc displacement.
author	Pompei Filho,Horácio Guimarães,Antonio Sergio Suazo Galdames,Iván Claudio
author_facet	Pompei Filho,Horácio Guimarães,Antonio Sergio Suazo Galdames,Iván Claudio
author_sort	Pompei Filho,Horácio
title	Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study
title_short	Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study
title_full	Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study
title_fullStr	Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study
title_full_unstemmed	Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study
title_sort	prevalence of the third head of the lateral pterygoid muscle: a magnetic resonance image study
publisher	Sociedad Chilena de Anatomía
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400014
work_keys_str_mv	AT pompeifilhohoracio prevalenceofthethirdheadofthelateralpterygoidmuscleamagneticresonanceimagestudy AT guimaraesantoniosergio prevalenceofthethirdheadofthelateralpterygoidmuscleamagneticresonanceimagestudy AT suazogaldamesivanclaudio prevalenceofthethirdheadofthelateralpterygoidmuscleamagneticresonanceimagestudy
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Prevalence of the Third Head of the Lateral Pterygoid Muscle: A Magnetic Resonance Image Study

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