喙齒 (Chhùi-khí)的 (ê)蝕損 (se̍k-sún)是講 (sī-kóng)喙齒因為 (in-ūi)化學 (hoà-ha̍k)物質 (bu̍t-chit),像 (chhiūⁿ)酸 (sng),來 (lâi)溶解 (iûⁿ-kái)深殖 (chhim-se̍k)去 (khì),毋過 (m̄-koh)細菌 (sè-khún)所 (só͘)造成 (chō-sêng)的酸無算在內 (bô-sǹg-chāi-lāi)。石榫 (Se̍k-sún)頭起先 (thâu-khí-seng)發生 (hoat-seng)佇 (tī)齒釉質 (khí-iū-chit),若 (nā)繼叔 (kè-siok)就 (tio̍h)來到 (lâi-kàu)齒本質 (khí-pún-chit),齒本質石筍 (se̍k-sún)的速度 (sok-tō͘)閣較 (koh-khah)緊 (kín)。
石筍上捷 (siāng-chia̍p)khoàiⁿ的原因 (goân-in)是 (sī)食物 (chia̍h-mi̍h)佮 (kap)飲料 (ím-liāu),親像 (chhan-chhiūⁿ)碳酸 (thoàⁿ-sng)飲料佮檸檬 (lê-bóng)汁 (chiap)。