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Yuav ua li cas muaj ntau yam cov hniav nyob rau hauv cov dev thiab nyob zoo li cas yam nws yog nyob ntawm seb

Peb cov tsiaj, feem ntau cov tsiaj. Anatomy thiab physiology ntawm tus kab mob nyob rau hauv lub hom ntawm cov tsiaj. Yog li ntawd, tus aub dej num raws li cov tsiaj. Nws yog ib tug predator, thiab nws txhais tau tias tus aub cov hniav yog tsim rau cov coj txoj kev ua neej. Lawv yoog mus lob, tuav, tua tus neeg, ua txhaum lub nqaij mus rau hauv daim. Nyob rau hauv kev twb kev txuas nrog xws li ib tug loj tus naj npawb ntawm cov kev khiav dej num lawv txawv mus rau hauv ntau hom: incisors, canines, premolars thiab hniav puas. Yuav ua li cas muaj ntau yam cov hniav nyob rau hauv ib tug aub? Nws nyob ntawm tus muaj hnub nyoog ntawm cov tsiaj. Zoo li cov neeg uas muaj me me tej tsiaj tuaj thawj lub sij hawm, qhov thiaj li hu ua cov mis nyuj, cov hniav. Tom qab lawv yog hloov los ntawm ib tug tas mus li. Deciduous hniav pup daim 28, Attendance ntawm lub Upper thiab qis jaws. Muaj tag nrho cov hom ntawm cov hniav uas tsis yog lub thawj premolar thiab hniav puas hniav ntawm tag nrho cov. Nws yog sau tseg hais tias lub xov tooj ntawm thawj cov hniav tej zaum yuav tsis tag, thiab nws tsis tas qhia tias ib co ntawm cov constants yog tseem tsis tag. Txawm li cas los, cov purchase ntawm cov me nyuam aub, yog hais tias tus aub yog teem exhibition thiab yug me nyuam ua hauj lwm, koj yuav tau hloov lawv tom qab.

Muaj ntau heev inexperienced tswv yog hais tias hais txog yuav ua li cas muaj ntau yam cov hniav ib tug aub mos liab? Tsis tag nrho. Peb tsiaj plaub ntxhov cov phooj ywg yog yug tailed kiag toothless. Vim hais tias lawv pub rau cov mis nyuj, ces nyob rau hauv Feem ntau, cov hniav yuav tsis tau lawv, thiab lawv yuav tsis hais txog ob lub lis piam. Tus thawj cov mis nyuj, los ntawm txoj kev, nws yog canines tuaj ntawm lub hnub nyoog ntawm 12-16 hnub. Tom qab lawv tuaj rau premolars thiab incisors. Raws li twb tau sau tseg, tus thawj premolars tsis yog ib tug menyuam dev. Yog hais tias lawv - qhov no yog ib tug malformation. Qhov tseeb hais tias mus tas li cov hniav nyob rau hauv qhov chaw no yuav ploj mus.

Yuav ua li cas muaj ntau yam cov hniav nyob rau hauv lub aub neeg laus? Ib tug ua tiav set ntawm cov hniav 42, 20 uas yuav yuav nyob rau hauv sab qaum puab tsaig thiab 22 - nyob rau ntawm lub hauv qab. Rau cov me nyuam aub muaj ntau ntau yam ntxiv rau tag nrho cov teeb ntawm 4 hniav puas thiab premolars. Hloov cov thawj cov hniav nyob rau hauv cov me nyuam pib nyob rau hauv 3-4 lub hlis thiab xaus ntawm rau lub hlis ntawm hnub nyoog. Nyob rau hauv lub khoom noj siv mis, nyob rau hauv lub qhov dej nyob rau hauv lub pib ntawm mus tas li, lawv yuav pib loj hlob nyob rau hauv thaum uas tig mus nrog cov hauv paus hniav resorption ntawm ib ntus hniav. Nws txoj hauj lwm nyob rau hauv cov pos hniav yuav thawv thiab nws ntog. tas mus li hniav hlob nyob rau hauv nws qhov chaw. Yuav ua li cas muaj ntau yam cov hniav nyob rau hauv lub aub tom qab 10 xyoo? Thaum muaj hnub nyoog, lawv yog erased khoom. Nrog kwv yees li 8-9 xyoo, lawv pib poob, yog li ntawd tus hniav-set ntawm ib tug tsiaj ntawm no muaj hnub nyoog yuav muaj tsis tag. Ntau nyob ntawm lub zoo ntawm cov khoom noj, uas yog pub mov rau cov tsiaj, thiab los ntawm lub qhov ncauj mob aub lub qhov ncauj.

Ib txhia tsis pom zoo hais tias nws yog tsim nyog los nqa tawm tu ntawm koj tus tsiaj cov hniav. Tej zaum lawv tsis paub tias nyob rau hauv niaj hnub tej yam kev mob tus aub yuav tsis zom rau ntev li ntev tau raws li tsim nyog rau txaus tu. Thiab cov zaub mov uas noj tus tsiaj tsis yeej ib txwm muaj ib tug txaus tus nqi ntawm cov zaub mov. Yog vim li cas koj yuav tsum tau paub yuav ua li cas txhuam koj cov hniav aub, thiab nqa tawm no txoj kev tu ncua, 1 lub sij hawm rau ib lub lim tiam. Ua li no, siv li ib txwm cov me nyuam tus txhuam hniav nrog ib nrab-shorn quav nplej thiab tshwj xeeb cov tshuaj txhuam hniav. Cov yav tas yuav tsum yuav nyob rau hauv ib tug tsiaj kav. Txhuam hniav koj cov hniav nyob rau hauv no yav tas tuskheej lub daj quav hniav, tab sis lub greenish-daj deposits - pob zeb - yuav tsuas yuav muab tshem tawm nyob rau hauv tshuaj loog nyob rau hauv chaw kho tsiaj lub tsev kho mob. Ib tug yooj yim txoj kev rau lub qhov ncauj mob khaws koj tus tsiaj cov hniav thiab tiv thaiv kom txhob muaj tshwm sim ntawm kev phem tsw los ntawm nws cov qhov ncauj.

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