Caracteristicas de superficies, adsorção de proteinas e aderencia bacteriana em diferentes materiais odontologicos / Surface characteristics, proteins adsorption and bacterial adherence on different dental materials

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The use of osseointegrated implants for replacing missing teeth is an important alternative in current dentistry. One of the most important conditions, which relates to the future success of implant procedures, is provided by the surface properties of the implant and its prosthetic abutments. Since these components penetrate through the gingival mucosa and are also exposed to the oral cavity, they play an important role not only for the biocompatibility but also for the bacterial adhesion and stagnation. Surface quality of a biomaterial can be measured by a combination of physical, chemical and mechanical properties and its surface structure. Surface ftee energy and surface roughness have a significant impact in the adhesion processo Since each biomaterial has different physicaVchemical properties and surfaces energies, adsorption of salivary/serum components to each surface is likely to be specific to that surface and they mediate the initial bacterial adherence to the tooth surface and restorative materiaIs. The bacterial adherence is recognized as th~ first step of the biofilm formation, which accumulation may lead to inflammatory lesions in the adjacent mucosa and bone resorption, increasing the risk of implant failure. Thus, the purposes of these studies were: I) evaluate surface characteristics of implant abutments (Ti-6Al-4V and Tilite) and 11) characterize the profile of salivary/serum components adsorption, and Streptococcus mutans and Actínomyces naeslundií adherence on titanium (Ti) and ceramic zirconia (Zi) used for manufacturing implant abutments. The results revealed that the Ti-6Al-4V and Tilite alloys showed differences on the surface characteristics, except to surface hardness and titanium and zirconia ceramic displayed similar biological properties in terms of protein adsorption and bacterial adherence. However, the abutment materials showed subtle, but significant differences on the bacterial binding pattern when compared to HA (surrogate tooth enamel), especially for A. naeslundií

ASSUNTO(S)

implantes dentarios zirconium zirconio dental implants

ACESSO AO ARTIGO

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