Video: Muaj pes tsawg chav kawm ntawm qhov txhaws?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov peb chav kawm raws li Lub kaum sab xis kev faib tawm yog raws li hauv qab no: Ib txwm tsis tuaj yeem ua haujlwm: Lub mesiobuccal cusp ntawm lub xub pwg thawj qhov cuam tshuam nrog qhov zawm zawm ntawm qis thawj tus hniav. Class I malocclusion: Zoo ib yam li ib txwm muaj tshwm sim tab sis ua rau muaj neeg coob coob, hloov pauv, thiab lwm yam tsis xws luag.
Ib yam li ntawd, nws tau nug, cov chav kawm ntawm occlusion yog dab tsi?
Txhawm rau kom nkag siab zoo dua ntawm hom qhov muag , nws tau tawg ua peb pawg: Hoob 1, Hoob 2i ib Hoob 3. Cov hniav sib koom ua ke hauv Cusp Fossa kev sib raug zoo nrog lawv cov hniav tiv thaiv kab mob. Qhov no tau sau tseg tias "NORMAL" qhov muag.
Class 3 tom yog dab tsi? Hoob 1 malocclusion yog qhov feem ntau. Cov tom yog ib txwm, tab sis cov hniav sab saud me ntsis sib tshooj cov hniav qis. Hoob 3 malocclusion, hu ua prognathism lossis underbite, tshwm sim thaum lub puab tsaig qis dua los yog juts rau pem hauv ntej, ua rau lub puab tsaig qis thiab cov hniav sib tshooj rau hauv lub puab tsaig thiab cov hniav.
Hauv txoj kev no, chav kawm thib ob occlusion yog dab tsi?
Hoob II : Distocclusion (retrognathism, overjet, overbite) Hauv qhov xwm txheej no, mesiobuccal cusp ntawm lub hauv paus thawj cov hniav tsis sib haum nrog mesiobuccal zawj ntawm qis thawj tus hniav. Hloov chaw nws yog yav dhau los rau nws. Feem ntau lub mesiobuccal cusp nyob hauv nruab nrab ntawm thawj cov hniav puas ntsoog thiab qhov thib ob premolars.
Dab tsi yog qhov zoo tagnrho?
Qhov Zoo Tshaj Plaws . Lub ntsiab lus (n): Kev sib raug zoo uas twb muaj lawm thaum txhua tus hniav tau ua tiav zoo nyob hauv cov arcades ntawm lub puab tsaig thiab muaj li qub kev sib raug zoo ntawm ib leeg. Thaum cov hniav raug coj los sib cuag cusp-fossa kev sib raug zoo yog suav tias yog kev sib raug zoo tshaj plaws ntawm lub cev uas tuaj yeem ua tau.
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