Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint Structures
<b>Introduction</b>: This study aimed to evaluate the submental and masticatory muscles in patients of different age groups using magnetic resonance imaging (MRI) and computed tomography (CT) methods, and investigate potential associations between muscle morphology, temporomandibular joi...
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2025-06-01
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| author | Melisa Öçbe Mahmut Sabri Medişoğlu |
| author_facet | Melisa Öçbe Mahmut Sabri Medişoğlu |
| author_sort | Melisa Öçbe |
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| description | <b>Introduction</b>: This study aimed to evaluate the submental and masticatory muscles in patients of different age groups using magnetic resonance imaging (MRI) and computed tomography (CT) methods, and investigate potential associations between muscle morphology, temporomandibular joint (TMJ) structures, and disc displacement. <b>Materials and Methods</b>: A total of 185 MRI scans were retrospectively analyzed to assess the thickness of the digastric, geniohyoid, mylohyoid, medial pterygoid, masseter, and lateral pterygoid muscles bilaterally. TMJ hard tissue changes were classified using computed tomography (CT). Correlations between muscle thickness and TMJ structures were analyzed using Pearson correlation coefficients, with statistical significance set at <i>p</i> < 0.05. <b>Results</b>: The study population included 110 females and 75 males, with a mean age of 50.08 ± 20.15 years. The largest age group was 51–75 years (41%), followed by 18–35 years (28%). Significant correlations were observed between muscle thickness and TMJ structures as follows: Right digastric muscle showed a significant association with right disc–condyle position (<i>p</i> = 0.02). Right mylohyoid muscle exhibited a strong correlation with right disc–condyle position (<i>p</i> = 0.004). Left medial pterygoid muscle was significantly correlated with left condyle pathology (<i>p</i> = 0.02). Left masseter muscle showed a significant correlation with left condyle pathology (<i>p</i> = 0.014). Condylar flattening was the most frequent pathology, observed in 58% of right condyles and 53% of left condyles. Disc displacement was present in 41% of right TMJs and 34% of left TMJs. <b>Conclusions</b>: This study highlights the important associations between masticatory and submental muscle morphology and TMJ structures, suggesting that muscle function may play a role in condylar positioning and disc alignment. These findings emphasize the need for comprehensive muscle evaluation in TMJ disorder (TMD) diagnosis and treatment planning. |
| format | Article |
| id | doaj-art-b00e87f9e8ab444aa9c8ce3446163d93 |
| institution | Kabale University |
| issn | 2075-4418 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diagnostics |
| spelling | doaj-art-b00e87f9e8ab444aa9c8ce3446163d932025-08-20T03:24:39ZengMDPI AGDiagnostics2075-44182025-06-011512153510.3390/diagnostics15121535Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint StructuresMelisa Öçbe0Mahmut Sabri Medişoğlu1Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kocaeli Health and Technology University, Yeniköy Mahallesi Ilıca Caddesi No:29, Başiskele 41275, Kocaeli, TurkeyDepartment of Anatomy, Faculty of Dentistry, Kocaeli Health and Technology University, Yeniköy Mahallesi Ilıca Caddesi No:29, Başiskele 41275, Kocaeli, Turkey<b>Introduction</b>: This study aimed to evaluate the submental and masticatory muscles in patients of different age groups using magnetic resonance imaging (MRI) and computed tomography (CT) methods, and investigate potential associations between muscle morphology, temporomandibular joint (TMJ) structures, and disc displacement. <b>Materials and Methods</b>: A total of 185 MRI scans were retrospectively analyzed to assess the thickness of the digastric, geniohyoid, mylohyoid, medial pterygoid, masseter, and lateral pterygoid muscles bilaterally. TMJ hard tissue changes were classified using computed tomography (CT). Correlations between muscle thickness and TMJ structures were analyzed using Pearson correlation coefficients, with statistical significance set at <i>p</i> < 0.05. <b>Results</b>: The study population included 110 females and 75 males, with a mean age of 50.08 ± 20.15 years. The largest age group was 51–75 years (41%), followed by 18–35 years (28%). Significant correlations were observed between muscle thickness and TMJ structures as follows: Right digastric muscle showed a significant association with right disc–condyle position (<i>p</i> = 0.02). Right mylohyoid muscle exhibited a strong correlation with right disc–condyle position (<i>p</i> = 0.004). Left medial pterygoid muscle was significantly correlated with left condyle pathology (<i>p</i> = 0.02). Left masseter muscle showed a significant correlation with left condyle pathology (<i>p</i> = 0.014). Condylar flattening was the most frequent pathology, observed in 58% of right condyles and 53% of left condyles. Disc displacement was present in 41% of right TMJs and 34% of left TMJs. <b>Conclusions</b>: This study highlights the important associations between masticatory and submental muscle morphology and TMJ structures, suggesting that muscle function may play a role in condylar positioning and disc alignment. These findings emphasize the need for comprehensive muscle evaluation in TMJ disorder (TMD) diagnosis and treatment planning.https://www.mdpi.com/2075-4418/15/12/1535masticatory musclessubmental musclestemporomandibular jointmuscle thicknessMRITMJ disorders |
| spellingShingle | Melisa Öçbe Mahmut Sabri Medişoğlu Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint Structures Diagnostics masticatory muscles submental muscles temporomandibular joint muscle thickness MRI TMJ disorders |
| title | Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint Structures |
| title_full | Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint Structures |
| title_fullStr | Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint Structures |
| title_full_unstemmed | Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint Structures |
| title_short | Magnetic Resonance Imaging of Submental and Masticatory Muscle Morphology and Its Relationship with Temporomandibular Joint Structures |
| title_sort | magnetic resonance imaging of submental and masticatory muscle morphology and its relationship with temporomandibular joint structures |
| topic | masticatory muscles submental muscles temporomandibular joint muscle thickness MRI TMJ disorders |
| url | https://www.mdpi.com/2075-4418/15/12/1535 |
| work_keys_str_mv | AT melisaocbe magneticresonanceimagingofsubmentalandmasticatorymusclemorphologyanditsrelationshipwithtemporomandibularjointstructures AT mahmutsabrimedisoglu magneticresonanceimagingofsubmentalandmasticatorymusclemorphologyanditsrelationshipwithtemporomandibularjointstructures |