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fujiwara_ca_me_araca.pdf: 1023210 bytes, checksum: d5bfe58a6ad917370b05a41403af9e6f (MD5) === Universidade Estadual Paulista (UNESP) === A adaptação entre a plataforma do implante e seu respectivo abutment deve ser precisa, isto é, sem nenhuma fenda, que é denominada microgap, entre as estruturas. A presença do microgap permite que microorganismos presentes na microbiota bucal migrem para o interior do implante, o que pode ocasionar problemas de natureza inflamatória e ou infecciosa, e, conseqüentemente, causar a perda do implante. Neste estudo utilizamos uma amostragem de 26 (vinte e seis) implantes e seus respectivos abutments provenientes de 5 (cinco) marcas comerciais diferentes: AS Tecnology, Conexão Sistema de Prótese, Neodent Implante Osteointegrado, Sterngold Implamed, e 3i Implant Innovation. Os abutments receberam um torque de 20Ncm. Os cortes longitudinais da interface implante/abutment foram mensurados em 6 (seis) locais com o auxílio da microscopia eletrônica de varredura. Os resultados das mensurações foram submetidos à análise estatística. Foi possível concluir que: 1) A seqüência dos grupos, em relação ao gap encontrado, do menor para o maior, foram: abutment cônico, abutment gold ucla, abutment mult unit. 2) O abutment cônico e o abutment mult unit apresentaram gaps menores que o abutment gold ucla. 3) O ponto interno apresentou gap menor em relação ao ponto médio, o qual foi menor que o ponto externo, portanto, as peças tenderam a convergir para o ponto interno. === The adaptation of the implant platform and its respective abutment must be precise, with no space denominated microgap, between the structures. The presence of a microgap allows microorganisms that are present in the buccal microbiology to migrate into the implant, what could cause inflammatory and/or infectious problems, and consequent loss of the implant. In this study, a sample of 26 (twenty six) implants and their respective abutments was taken: conic, multi unit, and the gold ucla - together with their respective fixing screws. The abutments received a manual torque of 20Ncm. After the manual preparation, the interface implant/abutment longitudinal cuts were measured on 6 (six) different points through an Scanning Electron Microscope (SEM). The results of such measurements were statistically analyzed, and according to the experimental conditions of this study, was possible to conclude: 1) The sequential groups of implants/abutments, in relation to the gap found, from the smaller to the biggest, were: a) conic abutment , b) gold ucla abutment , c) multi unit abutment. 2) The conic and the multi unit abutments showed smaller gaps than the gold ucla abutments. 3) The internal point showed a smaller gap than the middle point, and the middle point, in return, also showed a smaller gap in relation to the external point; therefore, the pieces tended to converge to the internal point.
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