Lateral pterygoid muscle volume and migraine in patients with temporomandibular disorders

Lopes, Sérgio Lúcio Pereira de Castro; Costa, André Luiz Ferreira; Gamba, Thiago de Oliveira; Flores, Isadora Luana; Cruz, Adriana Dibo da; Li, Min

doi:10.5624/isd.2015.45.1.1

Cited by 27 publications

(16 citation statements)

References 16 publications

(25 reference statements)

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“…Of the masticatory muscles, the lateral pterygoid muscle may be the most commonly involved in temporomandibular disorders. In patients with such disorders, abnormal activity of the lateral pterygoid muscle is occasionally observed and hyperactivity of the superior head of the lateral pterygoid muscle may lead to degenerative arthritic changes at the TMJ . The findings of the present study indicate that anterior movement of the bite position during unilateral teeth clenching promotes activity of the superior head of the ipsilateral lateral pterygoid muscle and thereby induces the developments of ipsilateral TMJ disorders.…”

Section: Discussionsupporting

confidence: 50%

Evaluation of masticatory activity during unilateral single tooth clenching using muscle functional magnetic resonance imaging

Okada

Yamaguchi

Watanabe

et al. 2016

J of Oral Rehabilitation

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Masticatory muscle activity during teeth clenching is affected by occlusal pattern. However, few studies have performed simultaneous evaluation of all masticatory activities during teeth clenching under various occlusal conditions. The aim of this study was to use muscle functional magnetic resonance imaging (mfMRI) to evaluate the effects of changes in occlusal point on masticatory activity during single tooth clenching. Changes in mean proton transverse relaxation time (∆T2) as an index of activity in all masticatory muscles during left unilateral clenching at the first molar or first premolar for 1 min were examined in nine healthy volunteers. Bite force was maintained at 40% of the maximum voluntary clenching force. The ∆T2 values of the masseter and lateral pterygoid muscles were analysed separately for superficial and deep layers, and for superior and inferior heads. The ∆T2 values for the ipsilateral deep masseter were significantly lower, and for the superior head of the ipsilateral lateral pterygoid muscles were significantly higher, after left first premolar clenching compared to left first molar clenching. These results quantitatively demonstrate a significant increase in activity of the superior head of the ipsilateral lateral pterygoid muscle and a significant decrease in activity of the ipsilateral deep masseter muscle with forward displacement of the occlusal contact point during unilateral tooth clenching.

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Section: Discussionsupporting

confidence: 50%

Evaluation of masticatory activity during unilateral single tooth clenching using muscle functional magnetic resonance imaging

Okada

Yamaguchi

Watanabe

et al. 2016

J of Oral Rehabilitation

View full text Add to dashboard Cite

show abstract

“…The present findings underscore the clinical importance of a detailed evaluation and the application of therapies directed at the LPM. Lopes (2015) 32 found that individuals with simultaneous diagnoses of TMD and migraine tend to exhibit hypertrophy of the LPM and have greater pain symptoms during palpation of this muscle. The authors also found strong associations between myofascial pain and both disc displacement and arthralgia in the diagnosis using the RDC/ TMD.…”

Section: Referencesmentioning

confidence: 99%

Evaluation of pain threshold upon palpation of the masticatory muscles in women with temporomandibular disorder according to the Research Diagnostic Criteria of Temporomandibular Disorders

et al. 2018

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Purpose: to evaluate the pain threshold upon palpation of the masticatory muscles in women with temporomandibular disorder (TMD) according to the Research Diagnostic Criteria of Temporomandibular Disorders (RDC/TMD). Methods: a cross-sectional study was conducted involving the evaluation of pain threshold upon palpation of the extraoral muscles (temporal, masseter, posterior mandibular region, submandibular region) and intraoral muscles (lateral pterygoid area and temporal tendon) in women using the RDC/TMD clinical examination. Results: 60 women were evaluated. Statistically significant differences were found among the muscles evaluated regarding the pain threshold. The lateral pterygoid area, bilaterally, had the lowest pain threshold, followed by the masseter and temporal muscles. Conclusion: this study suggests that the lateral pterygoid muscle, bilaterally, has the lowest pain threshold upon palpation among the masticatory muscles, followed by masseter and temporal muscles, in women with TMD, according to the RDC/TMD evaluation.

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“…However, the methodology for measuring the maxillary sinus may influence considerably the volume; the internal anatomy of maxillary sinuses is very complex and irregular, with presence of septs and other anatomical variations. Only specific software to calculate the actual segmented volume can be used to this measurement, providing accurate volume measurements by images (7,14,16). Prior to such use of segmented tridimensional images, the methods were more laborious and less precise.…”

Section: Discussionmentioning

confidence: 99%

Surgeons’ Performance Determining the Amount of Graft Material for Sinus Floor Augmentation Using Tomography

et al. 2017

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This study aimed to assess the performance of surgeons in determining the amount of graft material required for maxillary sinus floor augmentation in a preoperative analysis using cone-beam computed tomography images. A convenience sample of 10 retrospective CBCT exams (i-CAT®) was selected. Scans of the posterior maxilla area with an absence of at least one tooth and residual alveolar bone with an up to 5 mm height were used. Templates (n=20) contained images of representative cross-sections in multiplanar view. Ten expert surgeons voluntarily participated as appraisers of the templates for grafting surgical planning of a 10 mm long implant. Appraisers could choose a better amount of graft material using scores: 0) when considered grafting unnecessary, 1) for 0.25 g in graft material, 2) for 0.50 g, 3) for 1.00 g and 4) for 1.50 g or more. Reliability of the response pattern was analyzed using Cronbach's α. Wilcoxon and Mann-Whitney tests were performed to compare scores. Regression analysis was performed to evaluate whether the volume of sinuses (mm 3 ) influenced the choose of scores. In the reliability analysis, all values were low and the score distribution was independent of the volume of the maxillary sinuses (p>0.05), which did not influence choosing the amount of graft material. Surgeons were unreliable to determine the best amount of graft material for the maxillary sinus floor augmentation using only CBCT images. Surgeons require auxiliary diagnostic tools to measure the volume associated to CBCT exams in order to perform better.

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Lateral pterygoid muscle volume and migraine in patients with temporomandibular disorders

Cited by 27 publications

References 16 publications

Evaluation of masticatory activity during unilateral single tooth clenching using muscle functional magnetic resonance imaging

Evaluation of masticatory activity during unilateral single tooth clenching using muscle functional magnetic resonance imaging

Evaluation of pain threshold upon palpation of the masticatory muscles in women with temporomandibular disorder according to the Research Diagnostic Criteria of Temporomandibular Disorders

Surgeons’ Performance Determining the Amount of Graft Material for Sinus Floor Augmentation Using Tomography

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