During the restoration of a tooth using resin, acid etching achieves all of the following except ________?

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Enhances the tooth surface areaAllows direct chemical adhesion between resin and enamelProduces microscopic roughness on enamel for improved mechanical gripPrepares the tooth surface to improve resin wettability

Explanation

Acid etching increases the enamel surface area, creates microscopic irregularities to enhance mechanical retention, and conditions the tooth surface to improve wetting by resin. However, it does not enable a direct chemical bond between resin and enamel; bonding is primarily mechanical.