Artiküler eminens morfolojisi ve superior lateral pterygoid kasın temporomandibular eklem rahatsızlığı olan hastalarda manyetik rezonans görüntüleme ile değerlendirilmesi


Thesis Type: Dental Specialty

Institution Of The Thesis: Marmara University, Faculty Of Dentistry, Turkey

Approval Date: 2021

Thesis Language: Turkish

Student: NURAN BAYRAMOV

Supervisor: Şebnem Erçalık Yalçınkaya

Abstract:

MRI Evaluation of The Articular Eminence Morphology and Upper Head of The Lateral Pterygoid Muscle in TMD Patients

Aim: This retrospective study aimed to evaluate morphology and morphometry of articular eminence (AE), attachment type of lateral pterygoid muscle (LPM), length and pathology of upper head of LPM (UhLPM) related to disc status on magnetic resonance (MR) images and to assess the possible associations amongst them.

Materials and Methods: MRI (1.5-T,Siemens,Germany) images of 198 TMJs in 99 patients (16males,83females,mean age=30.6 years) were grouped according to disc status “normal,with/without reduction(DDwR/DDwoR)” and measurements were made oblique sagittal slices. LPM attachments to condyle-disc complex were categorized into three different types. AEMs and UhLPM pathologies were classified into four different groups. AEI, AEH, AEM, UhLPM length and pathology, and attachment type of LPM were analyzed and their possible associations were assessed statistically.

Results: Of TMJs, 37.9% and 36.9% showed DDwR and DDwoR respectively. Following subgroups were the most frequent; Sigmoid(54.5%) as AEM type, was Type II(39.4%) as LPM attachment type, and Hypertrophy(32.8%) as UhLPM pathologies. DD showed statistically significant differences with AEI(p<0.05). AEM showed statistically significant differences between AEI’s and AEH(p<0.001). No statistically significant differences were shown between muscle attachment types, UhLPM pathologies, AEI’s and AEH. UhLPM length was found statistically significant with DD, AEM, attachment type of LPM and UhLPM pathologies(p<0.001).

Conclusion: The findings of this study revealed that AEH/AEI indicated the morphology of AE, and UhLPM length in patients with DD may be affected by changes in morphology of AE and get shorter in presence of pathologies, therefore clinical evaluation and treatment planning of those patients need to be made accordingly.