Cov premolars, tseem hu ua cov hniav premolar, lossis bicuspids, yog cov hniav hloov pauv nyob nruab nrab ntawm cov hniav thiab cov hniav. Nyob rau hauv tib neeg, muaj ob premolars ib quadrant nyob rau hauv lub tas mus li txheej ntawm cov hniav, ua yim premolars tag nrho nyob rau hauv lub qhov ncauj.
Cov hniav premolar siv rau tib neeg li cas?
Premolars - Premolars yog siv rau tearing and crushing food. Tsis zoo li koj cov incisors thiab canines, premolars muaj qhov chaw tiaj tus. Koj muaj yim premolars tag nrho.
Puas muaj cov hniav premolar nyob hauv tib neeg lub cev?
Premolars (8 tag nrho): Cov hniav ntawm cov canines thiab molars. Molars (8 tag nrho): Cov hniav tiaj tus nyob tom qab ntawm lub qhov ncauj, zoo tshaj plaws ntawm kev sib tsoo zaub mov. Cov hniav ntse lossis cov hniav thib peb (4 tag nrho): Cov hniav no tawg thaum muaj hnub nyoog 18 xyoo, tab sis feem ntau raug phais tshem tawm kom tsis txhob txav ntawm lwm cov hniav.
Yuav ua li cas cov hniav yog premolars?
Premolars yog dab tsi? Koj yim premolars zaum ntawm koj cov canines. Muaj plaub premolars nyob rau sab saum toj, thiab plaub nyob rau hauv qab. Premolars loj dua canines thiab incisors.
Puas yog premolars ntse hniav?
Vim li cas koj xav tau koj cov premolars tab sis tsis yog koj cov hniav ntse
Ib yam li lawv lub npe qhia, premolars nyob ua ntej cov molars hauv tib neeg lub qhov ncauj. Cov hniav no tseem hu ua bicuspids.
