![Cov hniav twg yog tsim los ntawm ntau dua plaub lub lobes? Cov hniav twg yog tsim los ntawm ntau dua plaub lub lobes?](https://i.answers-medical.com/preview/medical-health/13886132-which-tooth-is-formed-from-more-than-four-lobes-j.webp)
Video: Cov hniav twg yog tsim los ntawm ntau dua plaub lub lobes?
![Video: Cov hniav twg yog tsim los ntawm ntau dua plaub lub lobes? Video: Cov hniav twg yog tsim los ntawm ntau dua plaub lub lobes?](https://i.ytimg.com/vi/xYgHogBchl4/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Thaum mandibular thawj premolars tsim los ntawm plaub lobes (mesial, distal, buccal, thiab lingual) ib yam li yav dhau los cov hniav thiab maxillary premolars, mandibular thib ob premolars feem ntau tsim los ntawm tsib lobes (mesial, buccal, distal, mesiolingual, thiab distolingual lobes ).
Ua qhov no hauv kev txiav txim siab, muaj pes tsawg lobes ua premolars los ntawm?
Nws tseem tau hais tias maxillary premolars thiab mandibular thawj premolar tsim los ntawm plaub lobes (mesial, distal, buccal, thiab palatal), whereas mandibular thib ob premolar uas feem ntau muaj ob lingual cusps tsim los ntawm tsib lobes (mesial, buccal, distal, mesiolingual, thiab distolingual lobes) [3].
Ib yam li ntawd, cov hniav twg yog yav dhau los? Hauv kev kho hniav, lo lus anterior cov hniav feem ntau hais txog ua ib pab pawg rau cov cov hniav thiab canine cov hniav raws li qhov txawv ntawm pos hniav tom qab , uas yog cov premolars thiab cov hniav . Qhov sib txawv yog ib qho ntawm sab xub ntiag (pem hauv ntej ntawm lub cev) tiv thaiv tom qab (nraub qaum ntawm lub cev).
Ib tus kuj yuav nug, pes tsawg tus lobes txhua tus hniav muaj?
Lub lobe yog ib qho ntawm thawj qhov kev faib tawm ntawm lub cev; txhua tus hniav tsim los ntawm plaub lossis tsib lub lobes (piv txwv li, lub hauv paus incisor daim ntawv los ntawm plaub lobes thaum thawj tus hniav hlob los ntawm tsib lobes.) Lobes feem ntau yog sib cais los ntawm kev nkag mus tau yooj yim txheeb xyuas tau.
Cov hniav twg muaj cov hauv paus ntev tshaj?
mandibular canine
Pom zoo:
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