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Magnetic resonance imaging assessment of the lateral pterygoid muscle in Class Ⅲ malocclusion subjects

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Author:: No author available

Journal Title:: Chinese Journal of Stomatology

Issue:: 1

DOI:: 10.3760/cma.j.issn.1002-0098.2012.01.003

Key Word:: 错(牙合),安氏Ⅲ类;磁共振成像;咀嚼肌;Malocclusion,Angle Class Ⅲ;Magnetic resonance imaging;Masticatory muscles

Abstract： Objective To analyze the relationship between Class Ⅲ malocclusion and pathological changes in temporomandibular joint (TMJ) structures using magnetic resenonce imaging (MRI).Methods Twenty-four Class Ⅲ malocclusion adult patients and 10 normal control cases were included in the study.The characteristics of lateral pertygoid muscle ( LPM ) in the sample group and the control group were assessed.Results More pathological changes of LPM were found in Class Ⅲ malocclusion adult patients (36 TMJ).The changes included hypertrophy,atrophy and contracture.And there was no relation between the pathological changes of LPM and the symptom of temporomandibular disorders (TMD). Conclusions The frequency of pathological changes of LPM was greater in patients with Class Ⅲ malocclusion than in the control group.

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