In general,the shade of a tooth should be taken _____ preparation of the tooth and _____ a rubber dam is placed.

Question

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In general,the shade of a tooth should be taken before preparation of the tooth and before a rubber dam is placed.The color of the rubber dam can interfere with accurate matching,and teeth dry out and become lighter when under the dam or if isolated with cotton rolls.For best shade matching,the teeth should be clean,free of stain,and moist.

In General,the Shade of a Tooth Should Be Taken _____