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Tì-hūi-khí (Hàn-jī: 智慧齒, Eng-gí: wisdom teeth) he̍k-sī tì-khí, tio̍h-sī tē-3 tمōa-kiū-khí (第三大臼齒, third molar), pâi-lia̍t tī khí-lia̍t (齒列, dentition) múi 1-ê quadrant ê siāng āu-piah, lóng-chóng ū 4 khí. Tì-hūi-khí thiⁿ-chan tāi-khài tī 18 kap 20 hòe chi-kan, m̄-koh ū lâng ē khah-bān chhut-khí. Tì-hūi-khí tiāⁿ-tiāⁿ bô-hoat-tō· thiⁿ-chan oân-choân, khā tī tē-2 tōa-kiū-khí ê āu-piah ē-kha, án-ne kiò-chò pa̍k-khí (縛齒, 阻生牙, impacted teeth).Tì-hūi-khí pa̍k-khí bô pō· mi̍h-kiāⁿ ê kong-lêng, gâu tui-chek khí-khún-pan ín-khí tē-2 tōa-kiū-khí ê āu-piah ē-kha khí-kin chiù-khí he̍k-sī gê-chiu-iām, nā-sī án-ne tio̍h-ài khiā tī ī-hông ê li̍p-tiûⁿ sū-sian kā bán-tû. Bán-tû pa̍k-khí ê siāng-hó sî-ki sī tī 20 hòe chó-iū, khang-chhùi khah-hó siu-sok , hù-chok-iōng mā khah-chió. M̄-koh ūi-tì siūⁿ chhim-pō· ê pa̍k-khí chin pháiⁿ bán-tû iū-koh bē ín-khí chiù-khí he̍k-sī gê-chiu-pēⁿ, gê-i-su ē khó-lū soán-tek bô-beh bán-tû; tēng-kî koan-chhat, nā-ū hoat-seng kî-thaⁿ ê pēⁿ-piàn (病變), chiah-koh bán-tû.