Myositis Ossificans Traumatica, an Unusual Cause of Mandibular Hypomobility.

ABSTRACT: Myositis ossificans traumatica is a rare condition in which causes restriction of mandibular movement. In this entity, temporomandibular joint is depleted of any problems; although all the patients have the history of trauma to the mandible and the face. Myositis ossificans traumatica can involve other parts of the body like femoral region with higher incidence in compare to the maxillofacial area. Blunt trauma to the head and neck causes muscle contusion injury, hematoma formation in the injured muscles or nearby soft tissues. Calcification of hematoma and heterotopic bone formation in the muscle, soft tissue, or near bony structures causes progressive decrease in mouth opening. Surgical removal of calcified body has been the only and one method for treatment of this disorder but rate of recurrence is high in the literature. The authors want to introduce 2 new cases of myositis ossificans traumatica, and then discuss about etiology and different treatment modalities.

Effects of oral clonidine premedication on hemodynamic status in bimaxillary orthognathic surgery: A double-blind randomized clinical trial.

PURPOSE: Controlled hypotension during a surgical procedure is a way to decrease blood pressure and subsequently to improve the field of operation. Clonidine is an antihypertensive agent used for induced hypotension. Correction of maxillomandibular discrepancies may necessitate performing osteotomy on both jaws in many cases. Bimaxillary orthognathic surgery is a procedure that is associated with significant blood loss. MATERIAL AND METHODS: A total of 30 participants who were candidates for double-jaw orthognathic surgery were classified into two groups with equal numbers. In one group, 300 µg oral clonidine premedication was administered 90 min before the operation, and in the other group a placebo with the same condition as in the first group. Mean arterial pressure (MAP) and heart rate at 10 min intervals, operation time, blood loss, and surgeon satisfaction were measured. RESULTS: A total of 10 men and 5 women with a mean age of 22.9 ± 2.9 years in the study group and 13 men and 2 women with a mean age of 22.1 ± 2.1 years in the control group were evaluated. The MAP was significantly lower in the clonidine group (P < 0.001). Intraoperative bleeding was 508.67 ± 46.2 mL in the placebo group and 287.33 ± 72.06 mL in the clonidine group, and the difference was statistically significant (P < 0.05). Significant differences were observed in operation time (P < 0.05) and surgeon satisfaction (P < 0.001). CONCLUSION: The authors of this study suggest clonidine premedication in bimaxillary orthognathic surgery. Hemodynamic stability, bleeding control, decrease of operative time, and enhancement of surgical results are advantages of this method.

Case series and review of glandular odontogenic cyst with emphasis on treatment modalities.

Glandular odontogenic cyst is a newly determined jaw entity with aggressive behavior and a high rate of recurrence. There is histopathologic resemblance to other lesions of the jaw such as intraosseous mucoepidermoid carcinoma. Although enucleation and curettage are not the treatment of choice for this cystic lesion, they comprise the most common method. On the other hand, filling the defect is a controversial matter, especially in lesions with large size. We introduce 4 cases of GOC, of which 2 are cases of recurrence. We applied bone material substitutes in 3 of these cases with success.