Incisors yog cov hniav uas koj siv los tom koj cov zaub mov. Canines - Koj cov hniav yog cov hniav tom ntej uas tsim hauv koj lub qhov ncauj Koj muaj plaub ntawm lawv thiab lawv yog koj cov hniav ntse tshaj plaws, siv los rhuav cov zaub mov. Premolars - Premolars yog siv los rhuav thiab zom zaub mov.
Dab tsi yog incisors hauv tsiaj?
Incisors (los ntawm Latin incidere, "kom txiav") yog cov hniav pem hauv ntej tam sim no nyob rau hauv cov tsiaj txhu feem ntauLawv nyob hauv premaxilla saum toj no thiab ntawm lub mandible hauv qab no. Tib neeg muaj tag nrho yim (ob ntawm txhua sab, sab saum toj thiab hauv qab). Opossums muaj 18, hos armadillos tsis muaj.
Dab tsi yog incisors canines thiab molars ua ke hu ua?
Tus cov hniav tshwj xeeb-incisors, canines, premolars, thiab molars-muaj nyob rau hauv tib txoj kev hauv txhua tus tsiaj. Hauv ntau hom tsiaj, cov me nyuam mos muaj cov hniav uas poob tawm thiab hloov los ntawm cov neeg laus cov hniav. Cov no hu ua cov hniav deciduous, thawj cov hniav, cov hniav me me los yog cov hniav mis.
Tus hniav twg yog tus incisor?
Cov incisors yog nruab nrab plaub hniav ntawm lub puab tsaig sab sauv thiab sab qis Lawv yog siv rau kev txiav, rhuav thiab tuav zaub mov. Qhov tom ntawm ib qho incisor yog dav thiab nyias, ua ib qho chisel-shaped txiav ntug. Cov canines (los yog cuspids, txhais tau tias tus hniav nrog ib qho taw tes) yog nyob rau ntawm ob sab ntawm lub incisors.
Vim li cas tib neeg thiaj muaj canines thiab incisors?
Tib neeg muaj cov hniav ntse hauv ntej hu ua canines, ib yam li tsov ntxhuav, hippos, thiab lwm yam tsiaj. Contrary to popular kev ntseeg, tib neeg canines tsis yog rau tearing thiab ripping nqaij. Hloov chaw, peb cov poj koob yawm txwv tau siv lawv los tawm tsam cov txiv neej sib tw rau txoj cai mating.
