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The osseointegration success depends on the integrity of the interface between abutment and peri-implant soft tissues. In this region, a seal closes the opening between the oral mucosal and the implant, preventing the ingress of bacteria, plaque and other debris into the tissues of the internal environment and it is responsible for the long term maintenance of osseointegration. To acquire a complete seal, soft tissues must be free of inflammation and bacterial contamination. Since superficial roughness of abutments can facilitate the bacterial plaque accumulation, the aim of the present study was to determine the relation between abutment roughness and soft tissue inflammation. Abutments with 2 different levels of roughness (standard and polished abutment) were installed in 10 pacientes treated with mandibular overdentures anchored by 2 implants (NAPIO). After a period of 3 months, biopsies were removed and analyzed on a light microscope. The cell morfometric results showed that soft tissues around polished abutments harbored significantly less linfocytes than soft tissues around standard abutments. Therefore, the reduced superficial roughness presented on polished abutments successfully minimized the soft tissue inflammation and it is suggested that abutment surface should be as polished as possible to allowed a better plaque control by patients. Anexo 1 – Tabela utilizada na contagem morfometrica celular Identificacao da Lâmina: . Data: ____//. Intervalo entre campos: . AREA PAPILAR AREA RETICULAR Pontos Tipos de celula Tipos de celula Campos EP CJ Fb/Fc Lf / Pl M / M Nt Vasos Outro Fb/Fc Lf / Pl M / M Nt Vasos Outro 11 12 13 14 15 16 17 18 19 20 Total Obs:

Efeito de duas diferentes rugosidades do intermediário de titânio no aspecto histológico do tecido peri-implantar de pacientes utilizando sobre-dentadura.