Efeito de enxaguatórios com e sem flúor sobre a resistência à corrosão de liga experimental Ti-10Mo

• Autor(a) principal: Borges, Hariane de Almeida Risso [UNESP]
• Data de Publicação: 2010
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/149314; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-01-25/000851060.pdf
• topic: Higiene bucal; Titânio; Ligas; Oral hygiene

Thanks to its excellent properties, titanium and its alloys are widely used in construction of prostheses and implants. Biocompatibility, high mechanical strength, low modulus of elasticity and corrosion resistance ensures its popularity in dentistry. However, titanium alloys suffer destruction and repassivation of the oxide film formed after contact with substances or transit through oral becoming susceptible to corrosion, reducing its mechanical properties or compromising its biocompatibility, allergenic potential and clinical performance. During recent years, oral mouthwashes have been introduced as adjuncts in oral hygiene, particularly in patients with dental implants. The composition of these products has a direct influence on the electrochemical behavior of alloys used in clinical dentistry. The purpose of this study was to evaluate the effect of oral mouthwashes with and without fluoride on the corrosion resistance of Ti-10Mo experimental alloy. Thus, cylinders with 30mm lateral and 5 mm in diameter were mounted on chemically activated resin colorless coupled to copper wire, so as to obtain the working electrode (n = 30) were divided into three groups : GI (Control) - saline solution, GII -0.5 g / l chloride cetilpiridíneo +0.05% sodium fluoride and GIII - 0.12% chlorhexidine diclonato. The potentiodynamic measurements were performed in cell and potentiostat PAR283 conventional glass double wall to thermostatization. We used the reference electrode Ag / AgCl, auxiliary spiral KClsat and platinum. When comparing the treated groups, the results indicated the formation of oxide layer thicker and less porous when the alloy was subjected to the action of 0.12% chlorhexidine diclonato. It was concluded that the studies performed in medium containing 0.12% chlorhexidine diclonato alloy showed greater corrosion resistance