Polishing _____ the uptake of professionally applied fluoride; therefore,polishing is _____ before fluoride application.

Question

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Historically,teeth were polished to remove all soft deposits and stains before the application of fluoride,because it was believed that there would be greater uptake of the fluoride into enamel.Scientific evidence has shown that polishing does not improve the uptake of professionally applied fluoride.Therefore,polishing is not necessary before fluoride application.

Polishing _____ the Uptake of Professionally Applied Fluoride; Therefore,polishing Is