Evaluation of the lateral pterygoid muscle using magnetic resonance imaging

Evaluation of the lateral pterygoid muscle using magnetic resonance imaging

Author D'Ippolito, S. M. Google Scholar
Wolosker, Angela Maria Borri Autor UNIFESP Google Scholar
D'Ippolito, Giuseppe Autor UNIFESP Google Scholar
Souza, B. Herbert de Autor UNIFESP Google Scholar
Fenyo-Pereira, M. Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Abstract Objectives: the aims of this study were to evaluate the visibility of the lateral pterygoid muscle (LPM) in temporomandibular joint (TMJ) images obtained by MRI, using different projections and to compare image findings with clinical symptoms of patients with and without temporomandibular disorders (TMD).Methods: in this study, LPM images of 50 participants with and without TMDs were investigated by MRI. the images of the LPM in different projections of 100 TMJs from 35 participants (70 TMJs) with and 15 participants (30 TMJs) without clinical signs and symptoms of TMD were visible and analysed.Results: the oblique sagittal and axial images of the TMJ clearly showed the LPM. Hypertrophy (1.45%), atrophy (2.85%) and contracture (2.85%) were the abnormalities found in the LPM. TMD signs, such as hypermobility (11.4%), hypomobility (12.9%) and disc displacement (20.0%), could be seen in TMJ images. Related clinical symptoms, such as pain (71.4%), articular sounds (30.4%), bruxism (25.7%) and headache (22.9%), were observed.Conclusions: Patients with TMD can present with alterations in the LPM thickness. Patients without TMD also showed alterations, such as atrophy and contracture, in TMJ images. Recognition of alterations in the LPM will improve our understanding of clinical symptoms and pathophysiology of TMD, and may lead to a more specific diagnosis of these disorders. Dentomaxillofacial Radiology (2010) 39, 494-500. doi: 10.1259/dmfr/80928433
Keywords lateral pterygoid muscle
magnetic resonance imaging
temporomandibular joint
temporomandibular disorders
Language English
Date 2010-12-01
Published in Dentomaxillofacial Radiology. London: British Inst Radiology, v. 39, n. 8, p. 494-500, 2010.
ISSN 0250-832X (Sherpa/Romeo, impact factor)
Publisher British Inst Radiology
Extent 494-500
Origin http://dx.doi.org/10.1259/dmfr/80928433
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000283994800005
URI http://repositorio.unifesp.br/handle/11600/33098

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