58281044-anatomie-radiologica-1
DESCRIPTION
anatomie radiologicaTRANSCRIPT
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Radiological anatomy 2010
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The examination plan of radiographies Projection and view Positioning of X ray film Teeth identification
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Dental structures analysis ;· Crown : enemal, dentina;· roots : dentin, cement· Pulp ; root canal· Lamina dura, periodontal space
Examination plan of dental radiographs
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Periodontal space analysis· Lamina dura· Periodontal space
Examination plan of dental radiographs
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osul alveolar Septele interdentare Septe interradiculare
Structuri anatomice invecinate
PLANUL DE EXAMINARE AL RADIOGRAFIILOR DENTARE
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ANATOMIA RADIOLOGICĂ A DINŢILOR PERMANENŢI
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Coroana - formată din smalţ şi dentină Coletul – zona de trecere dintre coroană şi
rădăcină, deci dintre porţiunea acoperită de smalţ şi cement, normal acoperite de gingie
Rădăcina – formată din cement.Gingia şi ligamentele alveolo-dentare nu sunt vizibile radiologic
ANATOMIA RADIOLOGICĂ A DINŢILOR PERMANENŢI
AP
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Smalţul acoperă coroana dentară
- foarte dens, fiind cel mai radioopac component al organismului
- acoperă dentina la nivelul coroanei dentare
AP
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Dentina – componenta de bază a coroanei şi
rădăcinilor dentare - radiologic este mai puţin opacă
comparativ cu smalţul - apare pe radiografie ca un strat
radioopac, omogen, care delimitează camera pulpară şi canalul sau canalele radiculare.
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– aceleaşi proprietăţi ca şi dentina, deci între cement şi dentină nu sunt diferenţe de opacitate
- este o continuare a smalţului dentar şi înconjoară dentina la nivelul rădăcinilor
- radiologic, are conturul şi delimitarea netă la exterior, iar în interior nu poate fi diferenţiat de dentină.
Cementul
AP
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– se proiectează pe radiografie prin diametrul vestibulo-oral al dintelui
- conţine pulpa dentară, reprezentată radiologic printr-o radiotransparenţă
- este mai mare decât imaginea ei radiologică
- are formă asemănătoare cu forma coroanei dentare:
Camera pulpară
- la dinţii monoradiculari are forma de linie sau de pară
- la molari şi mai puţin la premolari se observă mici prelungiri ale camerei pulpare în care se găsesc coarnele pulpare
AP
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Canalele radiculare – apar ca nişte prelungiri transparente ale
camerei pulpare, cu traseu central în lungul rădăcinii până la nivelul apexului.
- la premolarii superiori şi molarii inferiori sunt dificil de diferenţiat din cauza suprapunerilor.
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Spaţiul periodontal – se găseşte între dinte şi alveola dentară
şi este ocupat de ligamentele alveolodentare, ţesut conjunctiv, vase şi nervi
- radiologic, este reprezentat printr-o linie transparentă între cementul radicular şi corticala alveolară, numită lamina dura, spaţiul periodontal având aspectul unei intrelinii articulare, cu margini paralele şi dimensiunea de 0,4-0,5 mm.
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Alveola dentară – net conturată de lamina dura sau peretele
alveolar care constă în corticala osoasă, cu structură de os compact, sub forma unei opacităţi liniare de 0,5 mm.
- alveola uni- sau multiradiculaă respectă forma rădăcinilor pe care le înconjoară.
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Septul interalveolar (interdentar) – este diferit ca mărime şi formă în funcţie
de zona dentară examinată - poate fi în
formă de V sau U
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Septul interradicular
– are o formă triunghiulară cu vârful spre coroana dintelui şi este mai evident la nivelul molarilor inferiori
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Anatomia radiologica pe regiuni dentare
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Incisivi maxilari
Nasal septum
Nasal fossa
Nasal spine
Incisive foramen
Median palatine suture
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Incisivi centrali superiori
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Canini superiori
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A = plansul fosei nazaleb = sinus maxilarc = fosa laterala
(a & b form inverted Y)
a
cb
a
c
b
facial view
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Zygomatic process
Sinus septumSinus recess
Maxillary sinus
Premolari superiori
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Premolari superiori
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Molari maxilari
Sinus maxilarSinus recess
Osul malar
Apofiza pterigoida
Proces Coronoid Tuberozitate maxilara
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Molari superiori
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Incisivi mandibulari
Mental ridge
Tuberculii genieni Foramen lingualae
Fosa mentoniera
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Incisivi inferiori
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Canini inferiori
Creasta mentoniera
Genial tubercles
Lingual foramen
Gaura mentoniera
Cortical bone
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Premolari mandibulari
Mylohyoid ridge
Mandibular canal
Mental foramen
Submandibular gland fossa
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Molari inferiori
External oblique ridge
Submandibular gland fossa
Mandibular canal
Mylohyoid ridge(internal oblique)
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Molari inferiori
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Molari inferiori
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Slide # 1
A. The red arrows identify the ?
Floor of the nasal fossa
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Slide # 2
A. The red arrow points to the ?
B. The white arrows identify the ?
C. The blue arrow points to the ?
D. The yellow arrow identifies the ?
Coronoid process
Maxillary sinus*
Sinus septum
Zygomatic process
*(pneumatized into maxillary tuberosity)
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Slide # 3
A. The small radioluceny identified by the green arrow is the ?
Lingual foramen
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Slide # 4
A. The radiopacity identified by the blue arrows is the ?
B. The orange arrow identifies the ?
Mylohyoid ridge
Submandibular gland fossa
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Slide # 5
A. The yellow arrows point to the ?
B. The red arrows identify the ?
Zygomatic process
Maxillary sinus
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Slide # 6
A. The red arrow points to the ?
B. The orange arrow points to the ?
C. The blue arrows point to the radiolucent line known as the ?
Inferior concha
Nasal septum
Median palatal suture
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Slide # 7
A. The red arrows point to the ?
Mental ridge
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Slide # 8
A. The red arrows identify the ?
B. What is the name of the radiolucent area surrounding this structure?
Mandibular canal
Submandibular gland fossa
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