Premolars - Premolars yog siv rau tearing and crushing food. Tsis zoo li koj cov incisors thiab canines, premolars muaj qhov chaw tiaj tus. Tag nrho koj muaj yim premolars. Molars - Koj cov molars yog koj cov hniav loj tshaj plaws.
Dab tsi yog qhov ua haujlwm ntawm premolars thawj thib ob?
Premolars Premolars, los yog bicuspids, yog siv rau zom thiab zom zaub mov. Cov neeg laus muaj plaub premolars ntawm txhua sab ntawm lawv lub qhov ncauj - ob lub rau sab sauv thiab ob sab ntawm lub puab tsaig. Tsis muaj thawj premolars; thawj premolars tshwm nyob ib ncig ntawm lub hnub nyoog 10, nrog rau qhov thib ob premolars tuaj txog ib xyoos tom qab.
Dab tsi yog premolars?
Premolars, tseem hu ua bicuspids, yog cov hniav nyob ruaj khov nyob nruab nrab ntawm cov molars hauv qab ntawm koj lub qhov ncauj thiab koj cov hniav tsiaj, lossis cuspids, nyob rau pem hauv ntej. Vim tias premolars yog cov hniav hloov pauv, lawv pom cov yam ntxwv ntawm cov molars thiab canines thiab feem ntau zom thiab zom zaub mov.
Cov haujlwm ntawm molars thiab premolars teb yog dab tsi?
Teb: Lub luag haujlwm ntawm molars yog zom thiab zom cov zaub mov. Lub luag haujlwm ntawm premolars yog Nws pab txhawm rau txhawm thiab rhuav cov zaub mov.
Lub luag haujlwm tseem ceeb ntawm molars thiab premolars hauv cov tsiaj yog dab tsi?
Nws nquag taw tes thiab zoo li peglike nyob rau hauv cov duab thiab, zoo li cov incisors, muaj nuj nqi ntawm txiav thiab kua muag zaub mov. Premolars thiab molars muaj ntau qhov kev nce siab, lossis cusps, uas yog siv rau kev tawg.nce cov khoom noj. Tom qab txhua tus canine yog ob lub premolars, uas tuaj yeem txiav thiab zom zaub mov.
