齒釉質 (Khí-iū-chit)發育不全 (hoat-io̍k-put-choân)氏 (sī)喙齒 (chhùi-khí)先天 (sian-thian)的 (ê)疾病 (chi̍t-pēⁿ)，誠 (chiâⁿ)罕見 (hán-kiàn)，是 (sī)齒釉質的形成 (hêng-sêng)無 (bô)正常 (chèng-siông)所致 (só͘-tì)，佮 (kah)系統性 (hē-thóng-sèng)疾病或 (he̍k)身體 (sin-thé)全身 (choân-sin)的情況 (chêng-hóng)無關係 (koan-hē)。齒釉質大部分 (tōa-pō͘-hūn)由 (iû)礦物質 (khòng-bu̍t-chit)組成 (cho͘-sêng)，形成的過程 (kòe-têng)受 (siū)其中 (kî-tiong)的卵白質 (nn̄g-pe̍h-chit)調節 (tiâu-chiat)。齒釉質發育不全就是 (tō-sī)卵白質的功能 (kong-lêng)不良 (put-liông)所致。