Ntawm rostral mandibular views, ib kab xov tooj cua feem ntau muaj nyob nruab nrab ntawm thawj incisors (Daim duab 4). Cov kab no yog fibrocartilaginous mandibular symphysis.
Tus hniav qauv twg yog cov xov tooj cua tshaj plaws?
Dentin yog nyob tob rau hauv cov enamel thiab cementum thiab isoattenuating txheeb ze rau cementum thiab hypoattenuating txheeb ze rau enamel. Dentin nyob ib ncig ntawm lub hauv paus kwj dej thiab cov ntaub so ntswg chamber, feem ntau cov qauv hniav radiolucent thiab uas muaj cov ntsiab lus neurovascular ntawm cov hniav (13).
Qhov twg ntawm cov hniav yog radiolucent?
Background. Periapical radiolucency yog lub cim hluav taws xob ntawm cov pob txha inflammatory ncig lub apex ntawm tus hniav.
Cov qauv twg zoo li muaj hluav taws xob zoo ntawm cov kab hluav taws xob kho hniav?
Maxillary sinus - thaj chaw radiolucent nyob saum cov apices ntawm maxillary premolars thiab molars. Hauv pem teb ntawm lub maxillary sinus feem ntau tshwm raws li ib tug nyias wavy radiopaque kab (ob tog).
Thaum saib cov duab hluav taws xob kho hniav twg ntawm cov hauv qab no yuav pom cov xov tooj cua tshaj plaws?
Air space (xub) tshwm radiolucent, lossis tsaus, vim tias cov hniav x-rays dhau los ntawm dawb.
