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A light-cure glass ionomer liner/base that combines light-cure convenience with true glass ionomer fluoride release and bond strength.
Easy, Forgiving, Reliable and Enhanced Applications
Vitrebond requires application of a separate bonding agent to adhere composite to Vitrebond. The adhesion between composite and Vitrebond is found to be high with and without an separate acid etching. The material is forgiving in the powder/liquid ratio, which can be varied within a wide range to satisfy the consistency needs of the dental team. There is no significant difference in adhesion to dentin with a scoop/dropratio from 0.5:1 (0.7:1 by weight) through 1.5:1 (2.1:1 by weight). The 2:1 mix gives significantly lower dentin bond strength. Despite this decrease, the adhesion value is still higher than that of products like Cavalite, TimeLine and XR-Ionomer. The strength values are excellent for all P/L-ratios used. The depth of cure increases somewhat with increasing mix ratio. At the 2:1- ratio, depth of cure decreased 15%. Vitrebond applied under an indirect composite restoration has a good ability to restore the tooth stiffness to an amount not significantly different from that of the sound tooth. The modulus of elasticity provides adequate support when functioning as a base under amalgam. The product can be used in most areas where a very thin yet strong liner is required. It is ideal for use with indirect systems to block out small undercuts and to act as a protective coating over the dentin. In deep areas it can be placed over a calcium hydroxide liner. 3M™ Vitrebond™ Liner/Base is consistent with the cavity cleansing according to Brännström (Tubilicid). According to studies, removing the superficial smear layer with the cavity cleanser does not impair the bonding of Vitrebond to dentin. Although particular surface conditioners do not appear to negatively affect the dentin bond strength or even may improve other pretreatments of the dentin (Durelon or GC Conditioner) may negatively affect the adhesion to dentin. It appears that Vitrebond has the potential for being an effective amalgam adhesive in vivo, and it adheres to a variety of substrates such as set dental amalgam. Due to its adhesion to set amalgam and its superior masking qualities, Vitrebond is useful as an adhesive masking agent on amalgam with esthetically disturbing surfaces. Considering that the cumulative 1-yr success rate after a single treatment with Vitrebond was 79%, the use of light-cured glass-ionomers may be an effective way of treating dentin hypersensitivity
High Bond Strength
to a Variety of Substrates Bond strength to dentin of Vitrebond compares well or favorably relative to traditional and resin modified glass ionomer cements2 , showing higher numbers when tested on permanent teeth than on deciduous teeth. The adhesion is considered to be primarily chemically in nature. Vitrebond adheres to both carious and non-carious primary dentin both in vitro and in vivo. In vitro tests with simulated intra-pulpal pressure give consistent results for Vitrebond. Bond strength increases with increasing light exposure time and reaches its maximum value after approximately 30 seconds, while a delay of the command curing longer than 5 minutes after mixing results in a reduced bond strength. Although dentin surface treatments as Gluma 2 and a 10% polyacrylic dentin conditioner do not appear to negatively affect the dentin bond strength, a pretreatment of the dentin (Durelon or GC Conditioner) may negatively affect the adhesion to dentin. Studies showed that the retentive strength of amalgam restorations bonded with Vitrebond without mechanical undercuts compares to bonding amalgam with Amalgambond and Panavia Ex. Vitrebond therefore has the potential for being an effective amalgam adhesive in vivo.
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