Khí-soàⁿ (dental floss) sī 1 chióng nylon iù-si kap ê soàⁿ, he̍k sok-ka (chhiūⁿ teflon, polyethylene) chò ê soàⁿ, the̍h-lâi chheng chhùi-khí khí-phāng ê khí-khún-pan. Khí-soàⁿ khǹg-ji̍p khì chhùi-khí-phāng, chiap-kī khí-hoāⁿ ê só·-chāi, jiân-āu ǹg kā-ha̍p ê hong-hiòng khì khe chhùi-khí. Khí-soàⁿ ū-ê ū chham phang-bī, koh hun ū la̍h kap bô la̍h 2 khoán.

Dental hygienist flossing a patient's teeth
Dental floss