patch test

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A method used to determine if a specific substance causes inflammation of the skin (contact dermatitis). It is often used to test for an allergen. The allergen to be tested is first diluted in an appropriate vehicle to minimize its irritant potential; it is then fixed to the skin and covered with tape, usually on the upper back or upper arm. The tests are generally left on the skin for 48 hours to allow sufficient penetration of allergen to provoke a reaction.

Subjects: Dentistry.

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