Adenomatoid Ameloblastoma in the Mandible and Maxilla: Report of a Case

Ameloblastoma is an infrequent odontogenic neoplasm located in the mandible and/or infratemporal fossa extending into the maxilla. The authors report a patient who underwent a total of five operative interventions for recurrent lesions involving mandible and infratemporal fossa at other institutions before admission to our hospital. Radiographic imaging in our case demonstrated a solid/multicystic recurrent lesion of the right infratemporal fossa extending into the maxilla. Gross total excision of the tumour was done and the postoperative course was uneventful. In any case with a tumour located in this region, it is important to be aware of this condition because this lesion is unusual but serious pathology as illustrated in this report

Research on implants and osseointegration

Osseointegration was originally defined as a direct structural and functional connection between ordered living bone and the surface of a load-carrying implant. It is now said that an implant is regarded as osseointegrated when there is no progressive relative movement between the implant and the bone with which it is in direct contact. Although the term osseointegration was initially used with reference to titanium metallic implants, the concept is currently applied to all biomaterials that have the ability to osseointegrate. Biomaterials are closely related to the mechanism of osseointegration; these materials are designed to be implanted or incorporated into the living system with the aims to substitute for, or regenerate, tissues and tissue functions. Objective evaluation of the properties of the different biomaterials and of the factors that influence bone repair in general, and at the bone tissue?implant interface, is essential to the clinical success of an implant. The Biomaterials Laboratory of the Oral Pathology Department of the School of Dentistry at the University of Buenos Aires is devoted to the study and research of the properties and biological effects of biomaterials for dental implants and bone substitutes. This paper summarizes the research work resulting from over 25 years? experience in this field. It includes studies conducted at our laboratory on the local and systemic factors affecting the peri-implant bone healing process, using experimental models developed by our research team. The results of our research on corrosion, focusing on dental implants, as well as our experience in the evaluation of failed dental implants and bone biopsies obtained following maxillary sinus floor augmentation with bone substitutes, are also reported. Research on biomaterials and their interaction with the biological system is a continuing challenge in biomedicine, which aims to achieve optimal biocompatibility and thus contribute to patient health.Fil: Guglielmotti, Maria Beatriz. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay; ArgentinaFil: Olmedo, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay; Argentina. Universidad de Buenos Aires; ArgentinaFil: Cabrini, Rómulo L.. Comisión Nacional de Energía Atómica; Argentina. Universidad de Buenos Aires; Argentin