Abstract
Myositis Ossificans is characterized by the heterotopic formation of bone inside a muscle, tendons and ligaments. This pathology is traditionally classified into two groups: Myositis Ossificans Progressiva and Myositis Ossificans Traumatica. The pathogenesis of Myositis Ossificans Traumatica is still not well established. Because it is uncommon in the maxillofacial region, there are no consolidated treatment protocols. The purpose of this study is to present a case of a patient who evolved with Myositis Ossificans Traumatica of the masticatory muscles after performing third molar extraction.
Highlights
Myositis Ossificans (MO) is characterized by the heterotopic formation of bone within a specific muscle, tendons and ligaments and is rare in the head and neck region in cases of Myositis Ossificans Traumatica (MOT) [1].MO is traditionally classified into two groups: Myositis Ossificans Progressiva (MOP) and MOT
The most frequent symptom associated with MOT of masticatory muscles is trismus, which must be differentiated from trismus caused by abscesses, traumas, tumor lesions and by temporomandibular joint (TMJ) disorders [5]
Etidronate administration has been described as an auxiliary treatment of MOT of masticatory muscles despite the long-term side effects already known as osteomalacia
Summary
Myositis Ossificans (MO) is characterized by the heterotopic formation of bone within a specific muscle, tendons and ligaments and is rare in the head and neck region in cases of Myositis Ossificans Traumatica (MOT) [1]. The case of a patient who evolved with bilateral MOT of the lateral and medial pterygoid muscles after extraction of the four third molars will. At this moment, the patient had maximum mouth opening of 38 mm. In the postoperative follow-up of seven days, the patient evolved with paresis of the innervated muscles by the marginal nerve of the mandible to the right and decrease of the maximum mouth opening to 19.3 mm. A new surgical approach was performed four months after the first intervention At this surgical moment, under general anesthesia with assisted video-assisted nasotracheal intubation, bilateral submandibular access was performed to access the right and left mandibular ramus. In the control CT where intervention was performed (Figure 10)
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