Gabriela Mayrink

Evaluation of the Use of Biomodels in Sequelae of Maxillofacial Trauma

El uso de tecnologia de prototipado rapido en Cirugia Oral y Maxilofacial se ha incrementado en la ultima decada, lo que permite la gestion de los biomodelos de procesamiento de imagenes medicas, como tomografia computarizada para obtener un modelo tridimensional con las mismas caracteristicas geometricas del virtual. El objetivo de este estudio es presentar el uso de biomodelos para el tratamiento de las secuelas de un traumatismo maxilofacial con la evaluacion de las historias clinicas en un periodo que varia entre enero de 2000 a diciembre de 2010. Para el diagnostico y la planificacion de la cirugia maxilofacial de las secuelas en este periodo, 15 prototipos fueron utilizados, lo que permite determinar la planificacion del tratamiento con mas precision y para ahorrar tiempo de quirofano.

Recurrent mandibular dislocation treated by eminectomy.

Mandibular dislocations present with frequency; when they are recurrent and sustained over time, surgical treatment is indicated. Although different therapeutic techniques exist, the eminectomy is one of the most often applied. In this investigation, 3 cases are described where the bilateral eminectomy was performed for recurrent mandibular dislocation with 5 years of duration. No dislocation recurrence, postoperative pain, or functional alterations were observed in any of the patients. The bilateral eminectomy is a well-known procedure described in the literature, with good scientific support and constant modifications to optimize its indications and results. Compared with the results from other investigations, it is concluded that treatment with a bilateral eminectomy can be applied safely in cases of recurrent mandibular dislocations.

Comparative study between 2 methods of mounting models in semiadjustable articulator for orthognathic surgery.

PURPOSE Compare the traditional method of mounting dental casts on a semiadjustable articulator and the new method suggested by Wolford and Galiano, 1 analyzing the inclination of maxillary occlusal plane in relation to FHP. MATERIALS AND METHODS Two casts of 10 patients were obtained. One of them was used for mounting of models on a traditional articulator, by using a face bow transfer system and the other one was used to mounting models at Occlusal Plane Indicator platform (OPI), using the SAM articulator. After that, na analysis of the accuracy of mounting models was performed. The angle made by de occlusal plane and FHP on the cephalogram should be equal the angle between the occlusal plane and the upper member of the articulator. RESULTS The measures were tabulated in Microsoft Excell(®) and calculated using a 1-way analysis variance. Statistically, the results did not reveal significant differences among the measures. CONCLUSION OPI and face bow presents similar results but more studies are needed to verify its accuracy relative to the maxillary cant in OPI or develop new techniques able to solve the disadvantages of each technique.

Surgical treatment of odontogenic myxoma and facial deformity in the same procedure.

Odontogenic myxoma (OM) is an uncommon benign tumor with aggressive and invasive behavior. Predominant symptoms are usually slow and painless swelling, sometimes resulting in perforation of the cortical borders of the affected bone. In this paper, a case report of a patient with an OM on the right maxillary sinus and a vertical excess of maxilla will be presented. The treatment chosen was tumor resection in association with orthognathic surgery with biomodels assessment for surgical planning. A 3-year follow-up showed disease free and stability of the new position of maxilla. The international literature is evaluated to discuss this case report.