[Odontogenic myxoma]. / Mixoma odontogénico.

BACKGROUND: the odontogenic myxoma is a recurrent benign neoplasm that when it grows can generate pain, tooth mobility and dysesthesia. Prevalent in adults with an average between the 28.8 years and is rare in minors; It is more common in women. His prognosis is good after enucleation and its malignant transformation is rare. CASE REPORT: 53 years old woman who attended the service of maxillofacial surgery by increase of volume in right geniana region, without other symptoms; He referred traumatic background by fall of 5 m in height at age 33. Her studies were carried out laboratory; the results were normal. Computerized axial tomography revealed poorly delimited hipodensa central image. The histopathology of the incisional biopsy report indicated Odontogenic myxoma, so it was decided to resection in block, with margins of safety. In the follow-up to a year without complications or recurrence. CONCLUSIONS: described odontogenic myxoma presented in the right upper jaw, so it represented a challenge given the characteristics of the unusual location, it is crucial to recognize the progress of the lesion to individually regulate the therapeutic procedure.

[Total temporomandibular joint replacement with alloplastic prosthesis]. / Articulación temporomandibular. Reemplazo con prótesis aloplástica.

Three total temporomandibular joint (TMJ) replacement surgeries were performed on two patients with TMJ ankylosis using W. Lorenz system. The first surgery was performed on a female patient with osseous ankylosis who had no mandibular movement since she was 18 months old. The second surgery was on a patient with fibrous ankylosis who had an interincisive opening distance of 12 mm. Her condition was the result of a three year old subcondylar fracture which didn't receive any treatment. The first patient had total replacement of both TMJs, while the other just one TMJ. The follow up until today has been of eight months with an interincisive opening of 29 mm in the first patient and 34 mm in the other. There has not been any mandibular deviation during opening, nor postoperative pain in both cases. Facial nerve affection was not permanent in both patients. For all of this, we can conclude that total TMJ replacement is an effective treatment with stable results in patients with TMJ ankylosis.

[Osteosynthesis with 2-octylcyanoacrylate and sodium bicarbonate in zygomatic arch fractures: animal model results]. / 2-octilcianoacrilato y bicarbonato de sodio para osteosíntesis de arco cigomático. Un modelo animal.

BACKGROUND: 2-octylcyanoacrylate (2OCA) is a liquid monomer that polymerizes on contact with a surface by an exothermic reaction creating a strong and flexible film. The addition of sodium bicarbonate accelerates the polymerization. The aim was to use the combination of 2OCA and sodium bicarbonate in the treatment of zygomatic arch fractures in an animal model and to evaluate the biocompatibility and bone healing. METHODS: twenty animals were subjected to bilateral zygomatic arch fracture under surgical sedation, and using 2OCA fixation and sodium bicarbonate for the experimental side and without fixation for the control side. Observation was over a period from two to four weeks, assessing biocompatibility, stability and consolidation. RESULTS: at the end of two and four weeks the twenty animals showed the presence of osseous callus and continuity of marrow channel measured by macroscopic and radiography examinations. CONCLUSIONS: the use of 2-octylcyanoacrylate and sodium bicarbonate led to the stabilization and reduction of bilateral zygomatic arch fractures in an animal model without adverse reactions.