Ms. Quan explained that by cutting the hair dry, she would be able to sculpt it the way it would fall and curl naturally.

WSJ: Haircuts for Women With Curly Hair: Testing 4 Salons

An ingenious new laser called Waterlase adds to that the ability to cut through dry teeth and bone by casting a cloud of hot water vapor around the laser's cutting point, a couple of millimeters from the tooth.

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