• Journal of Oral Medicine and Pain
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• v.41 no.1
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• pp.26-29
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• 2016

Intramuscular hemangioma is a rare type of hemangiomas and sometimes overlooked by orofacial pain specialist who encountered various types of masticatory muscle problems. A 42-year-old male, presented with feeling of unilateral hypertrophy on left mandibular area, is finally diagnosed as hemangioma with thrombus by excisional biopsy. However, he was initially treated by injection of botulinum toxin A due to misdiagnosis as unilateral masseter hypertrophy. In the present report, we remind the importance of careful examination and diagnostic images to orofacial pain clinicians in early detection of intramuscular hemangioma of masticatory muscles.

• Journal of Dental Rehabilitation and Applied Science
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• v.27 no.2
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• pp.247-251
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• 2011

Botulinum toxin type A (BoNT-A) is used for treating bilateral masseter hypertrophy since 1994. Recently there have been more clinical studies in this area, with some authors reporting that BoNT-A can reduce the size of the masseter muscle, as documented by photography, ultrasonography, computed tomography, and 3D(three dimensional) laser scan. However, earlier studies were only for bilateral masseter hypertrophy cases, not for unilateral masseter hypertrophy cases. The aim of this study was to use 3D laser scanning to evaluate changes in the external facial contour induced by unilateral BoNT-A injection. BoNT-A was injected into hypertrophic masseter muscle unilaterally in 10 patients with asymmetric masseter hypertrophy. The clinical effects of unilaterally injected BoNT-A were evaluated before the injection and 4, 8, and 12weeks after the injection using 3D laser scan. And the mean values of both sides (injection and non-injection sides) were compared with. At injection side, mean values of the volume and the bulkiest height at each time point diminished significantly between pre-injection and 4, 8, and 12weeks post-injection. At non-injection side, in contrast, mean values of the volume and the bulkiest height diminished also but less than that of injected side, and there was no statistical significance. In this limited study, we concluded that the unilaterally BoNT-A injection side showed greater mean values of the reduction of muscle volume than non-injection side at 4, 8, and 12 weeks after the injection.

• The Journal of the Korean dental association
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• v.15 no.3
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• pp.205-208
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• 1977

The etiology of masseteric hypertrophy is obscure. When the hypertrophy occurs unilaterally it's appearance is more striking because of the resultant facial asymmetry. Two soldiers were admitted with the complaint of a lump on their jaws. The authors obtained good results on the esthetic & functional aspect in two cases of unilateral masseteric hypertrophy with the Adam's method. The etiology was thought to be the combination of unilateral masticatory and jaw clenching habits when emotionally disturbed or under nervous tension in army services.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.21 no.2
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• pp.215-219
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• 1999

This article discusses the diagnosis, anatomic consideration, and surgical management of masseter muscle hypertrophy. Surgical correction is advised for patients who have esthetic complaints. Esthetic improvement can be achieved by surgery and not by conservative treatment. Recently, the intraoral method, which leaves no scar on the face and minimizes the possibility of injury to the marginal branch of the facial nerve, has been supported by many surgeons. Patients who complained of marked swelling of unilateral or bilateral mandibular angle area and showed abnormal bony growth at the mandibular angle area and enlarged masseter muscle received mandibular angle shaving and excision of the inner layer of masseter muscle with intraoral approach. After operation, physiotherapy was done with EAST(eletrical acupuncture stimulation therapy) for encouraging the mouth opening and reducing the swelling. They showed early maximum mouth opening and reduction of swelling.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.11 no.2
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• pp.74-80
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• 1989

Etiological manifestion of unilateral a bilateral hypertrophy of masseter muscle, is not cleanly defined. It thought to have a congenital combined with occlusion, psychogenic & neurophysiologic rances. The disease is cleanly differentiated from other disease, however careful distinction of the parotid disease is necessary due to its location. The patients mainly complaint aesthetic problems, surgical excision is the treatment of choice. Although no recurrence cases were reported, follow up for this is recommended.