The authors report a congenital portosystemic shunt which was detected with ultrasound in an infant with a fatal congenital hypertrophic cardiomyopathy. An aberration in primitive vitelline venous development may have contributed to the formation of this unusual vessel.
do Departamento de Estomatologia, pelas oportunidades concedidas e pela amizade. À Profa. Dra. Marlene Fenyo Soeiro de Matos Pereira, pela constante disposição em colaborar para aumentar nossos conhecimentos desde a graduação. Ao Prof. Dr. Claudio de Freitas, por sua dedicação, competência, esforço e exemplo. Ao Prof. Dr. Moacyr Domingos Novelli, pelos seus conhecimentos e pela ajuda na elaboração deste trabalho. Ao Laboratório de Informática Dedicado à Odontologia (LIDO), pela utilização de suas dependências e equipamentos na realização deste trabalho. Aos Professores da Disciplina de Radiologia da Faculdade de Odontologia da Universidade de São Paulo, pela amizade e conhecimento científico compartilhado. Ao amigo Prof. Mario Sergio Saddy pelo companheirismo deste ultimos anos. Aos colegas do Curso de Pós-Graduação em Radiologia pela amizade e companheirismo. Ao Prof. Dr. Laércio Wonhrath Vasconcelos, Diretor Clínico do Brånemark Osseointegration Center -São Paulo pelo apoio e disponibilização das radiografias utilizadas neste trabalho. Palavras-Chave: Implante osteointegrado -Função imediata -Carga imediata -Controle radiográfico longitudinal -Processamento digital de imagens -Radiografias periapicais Hayek JE. Evaluation of the cervical perimplantar optical density in a longitudinal control of implants with immediate occlusion function in maxilla [Tese de Doutorado].
ABSTRACTThe aim in this study was the evaluation of the variations of the perimplantar optical bone density at the cervical region in a longitudinal control, by the use of digitized radiographs of ten patients, who received six implants installed in the maxilla and submitted to immediate occlusion function, through fixed prosthesis installed 24 hours after the surgery. All the patients were observed in clinical control, with resonance frequency analysis and also radiographic control. It was performed a intraoral radiograph using the paralleling technique, with the long cone and the beam of x-ray aimed perpendicular to the long axis of the implant. The radiographic controls were done at the time of the installation of the prosthesis, after six months and after twelve months after the first control. The obtained radiographs were captured by a black and white video camera by an optical microscope (40 times of magnification).Due to the utilized magnification, the implants have their images digitized in two steps: half right and half left, and they were considered as independent samples.After the superimposition of a standardized pattern, to help the standardization of the areas of the study, it was analyzed the optical density at the areas of interest bone + implant and at areas of control bone (where it is not hope changes) through the software ImageLab. To correct possible variations of the effect of the absence of standardization of the geometric projection and the radiographic density, it was realized a mathematic equation and it was obtained a correction factor of density in order to compensate. The results sho wed that there were percentage vari...
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