MRI evaluation of TMJ internal derangement: Degree of anterior disc displacement correlated with other TMJ soft tissue and osseous abnormalities

Hasan, Nahla Mohamed Ali; Abdelrahman, Tarek Elsayed Ftohy

doi:10.1016/j.ejrnm.2014.03.013

Cited by 25 publications

(21 citation statements)

References 29 publications

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“…[1] In the present study, the prevalence of TMD symptoms in females is higher than males (Male -female prevalence ratio 1:3.16). Similarly, male-female prevalence ratios of 1:2.1 [2] and 1:4 [4] have been reported in the previous studies. It is well known that TMD is multifactorial and is attributed to numerous factors like discrepancy in occlusion, restorative procedures, orthodontic treatment, parafunctional habits, improper posture, emotional stress, trauma, etc.…”

Section: Discussionsupporting

confidence: 86%

“…[5,6] It has been seen that ADD is classified subjectively into categories based on complete or partial disc displacement with or without reduction. [2] This method is unreliable and its reproducibility is questionable. In this study a more methodical approach for classification of ADD was adopted which is highly reproducible and can be used to study treatment outcomes and prognosis of patient at recalls.…”

Section: Discussionmentioning

confidence: 99%

“…Results of our study showed association of increased thickness of inferior attachment of LPM with pain and ADD similar findings were reported in other studies. [2,11] Tomas et al [11] stated that inferior head of LPM may become hyperactive in internal derangement so as to stabilize and position the disc which leads to increased thickness of the muscle. Bony erosions of the condyle and joint effusion were less frequently seen in this series.…”

Section: Discussionmentioning

confidence: 99%

“…Hence, these alterations have been also referred to as disc derangement. [2] Anterior Disc Displacement with reduction (ADDR) and Anterior Disc Displacement without reduction (ADDWOR) are the major findings in TMJ internal derangement whereas Posterior Disc Displacement is less common. MRI has been proven to be an excellent imaging technique for revealing the disc position in sagittal and coronal planes, shape of the disc, the condyle translation and to assess the thickness of the Lateral Pterygoid muscles.…”

Section: Introductionmentioning

confidence: 99%

“…MRI has been proven to be an excellent imaging technique for revealing the disc position in sagittal and coronal planes, shape of the disc, the condyle translation and to assess the thickness of the Lateral Pterygoid muscles. [2] The aims of this study were to interpret MRI findings of Temporomandibular Disorders (TMD's) and to find out correlation(s), if any, between the patient's signs and symptoms and MRI findings. The other objectives of this study were to propose a new method in assessment of degree of TMJ disc displacement in MRI.…”

Section: Introductionmentioning

confidence: 99%

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TMJ Disc Displacement Angle Analysis in MRI: A New Proposal

Vaidya¹,

Chinam²,

Khorate³

et al. 2020

ojdom

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Objective: To evaluate the co relation of clinical symptoms and MRI findings of TMJ in symptomatic Temporomandibular Dysfunction (TMD) patients. Material and Method: MRI TMJ scan of 25 patients were evaluated. The subjects had clinical evidence of reciprocal TMJ clicking or restricted mouth opening. This study determined the variability of temporomandibular joint (TMJ) disk position in antero-posterior aspect of the joint using magnetic resonance imaging (MRI). Disk position was evaluated on MRI by measuring the angle formed by a line through the middle of the condyle and tangential to the posterior-most aspect of the disk. Joint effusion was checked using T2 weighted image sequence. Thickness of superior and inferior head of lateral pterygoid muscle was measured. These MRI findings were then correlated statistically to clinical findings. Results: Out of 50 TMJ's (25 patients); 40% had biconcave shape (no deformity), 16% cases showed lengthened disc, 12% cases showed a flattened disc, 12% cases showed thick posterior band. Varying degrees of disc displacement was associated with disc shape deformity. Increased thickness of Inferior head of lateral Pterygoid had statistically strong association with pain. Conclusion: A strong positive co relation was seen between the clinical and MRI findings in symptomatic TMD patients. Further using this, a new Disc Displacement angle measurement method and classification of disc shape was proposed for better disc evaluation.

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Section: Discussionsupporting

confidence: 86%