Saliva helps protect teeth and gums from bacteria that cause cavities and gingivitis. So a perpetually dry mouth is more susceptible to tooth decay and gum disease.

唾液可以保护牙齿免受引发牙齿腔洞和牙龈炎的细菌感染，所以长期干燥的口腔更易患这两种疾病。

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Next time you're brushing your teeth, smear a bit of toothpaste on the bathroom mirror and wipe it dry.

下次你要刷牙的时候，往浴室的镜子上涂一点牙膏并将其擦干。

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Laser welding thin wall bit is characterized by high welding strength of bit teeth, no falling out of the teeth and mass production by non water dry drilling.

激光焊接薄壁钻头的显著特点是钻齿焊接强度高，不掉齿，可以用于无水干钻，便于实现大批量规模化生产。

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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.

FORBES: Magazine Article