Maria Monisha, A (2020) Facial Asymmetry: A Photographic and Electromyographic study of Masseter Muscle Hypertonicity and Its Predictive Value in TMD Diagnosis. Masters thesis, Sree Mookambika Institute of Denal Sciences, Kulasekharam.
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Abstract
BACKGROUND: Mastication is one of the important functions of the stomato-gnathic system. On the whole it depends on the integrated complex activity of muscles, joints, ligaments, bones etc. Most individuals have a lateral preference that is tendency to chew on one side. This unilateral mastication has been cited as one of the possible etiological factors for facial asymmetry as form follows function. Masseter plays an important role in facial asymmetry whereas the other muscles that form facial symmetry are not firmly attached to the stomatognathic triad, hence may not alter the facial form. It has been accepted that chronic unilateral mastication has a potentially high traumatic effect on temporomandibular joint disorder. AIM OF THE STUDY: To photographically assess the facial asymmetry in unilateral masticators using Image J software as long time unilateral mastication predisposes an individual to temporomandibular joint disorders and to record the activity of masseter muscle using electromyography. METHOD: Our study included 150 patients of which 50 were controls, 50 unilateral masticators and 50 individuals with temporomandibular joint disorder were selected based on the selection criteria. History was elicited with questionnaire based on Foneseca Anamnestic Index. Then clinical examination of TMJ and the muscles of mastication was done followed by frontal photography of the subjects where facial asymmetry will be analysed by Image J software. Then electrical activity of masseter muscle was assessed using surface electromyography. RESULTS: Our study confounds the hypothesis that patient with tendency to chew on one side did not have associated hypertrophy and hypertonicity of the masseter muscle and associated with the development of temporomandibular joint dysfunction. However, we presume airway restriction and occlusal discrepencies may be the prime factors leading them to a TMD. CONCLUSION: Our study conclusively proves that examination aided with photographic assessment is an effective tool in diagnosing unilateral mastication. Further studies with inclusion of occlusal discrepencies along with airway analysis will aid in the better understanding on the etiology of TMD.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | 241727253 |
| Uncontrolled Keywords: | Hypertonicity, Mastication, Temporomandibular Joint. |
| Subjects: | DENTAL > Oral Medicine and Radiology |
| Depositing User: | Subramani R |
| Date Deposited: | 25 Feb 2021 15:10 |
| Last Modified: | 25 Feb 2021 15:10 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/14524 |
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