Intraoral Radiographic Interpretation

% mineralized?

• Enamel: ?

• Dentin?

• Cementum

• Pulp Chamber?

• Enamel: 92%

• Dentin: 65%

• Cementum: 50% cannot be visualized radiographically, too thin

• Pulp Chamber: radiolucent

Radiopaque vs radiolucent

Radiopaque = bright white, things like bone etc

Enamel, dentin, pulp chamber

Supporting Structures? (5)

• lamina dura

• Alveolar crest

• Periodontal Ligament Space

• Cancellous Bone

• Nutrient Canals

lamina dura

lamina dura

Alveolar crest

Bone loss is seen on __ and is ?

bitewings, CEJ + bone crest = 2 mm

How can you tell if tooth is erupting?

Roots are open = erupting

PDL space

cancellous bone

cancellous bone

nutrient canal

nutrient canal

max sinus floor - radiopaque, space is sinus

septum of max sinus

Zygo process: radiopaque over molars U shape

Nasal Floor runs toward Central incisors, sinus runs toward molars

lateral fossa

where do you find lateral fossa?

depression in maxilla of apex of lateral incisor:

intermaxillary suture

intermaxillary suture

intermaxillary suture/ median suture is?

From anterior nasal spine thru crest between central incisors: radiolucent line

anterior nasal spine and nasal fossa, top is concha

ANS (ant nasal spine) is located __ to the alveolar crest

1.5 to 2 mm superior

Incisive/Nasopalatine foramen

The incisive/nasopalantine foramen is projected where? When do you think duct cyst?

• between roots and middle and apical thirds of central

• Size exceeds 1 cm or when enlargement may be demonstrated on sucessive radiographs

nose and lip lines

nasolabial fold

1. Mentum (chin)

2. Mental foramen

3. Body of mandible

4. Ramus

5. genial tubercles

6. mylohyoid/internal oblique

7. Mandibular foramen

symphisis

where do you see symphisis?

• radiolucent line thru midline of mandible of central incisors in Infants: suture usually fuses by end of first year

genial tubercles/lingual foramen

opacity = genial tubercle, ladiolucent = lingual foramen

opacity = genial tubercle, ladiolucent = lingual foramen

genial tubercles serve as ?

attachment of genioglossus muscle as superior tubercles, and geniohyoid mucles at inferior tubercles

lingual foramen may contain?

branch of lingual artery

mental ridge

tori

mental ridge is flat, tori is rounder and a little higher

mental fossa

nutrient channels

most often see nutrient channels where? (maxilla/mandible, what radiograph, specifics?)

• mandibular anterior PA running vertically from inferior alveolar canal to apex?

external oblique

mylohyoid ridge

The external oblique is a continuation of?

The mylohyoid ridge is a crest of bone where? What does it attach?

• ex: ant border of mandibular ramus

• ridge: crest of bone of lingual surface of mandibular body, attaches mylohyoid muscle

Mylohyoid ridge vs external oblique?

Ext runs thru roots, mylohyoid should be under

circle? arrows?

bone loss, mylohyoid line

mandibular canal

the mandibular canal is __ and the space around it is?

radiopaque, submandibular gland fossa is surrounding radiolucent area

mental foramen

how to tell if mental foramen or decay?

lamina dura should be continuous, foramen is not centered under root

where can you find mental foramen?

• mesial of 1st molar to mesial of 1st premolar

canal becomes crestal bone

submanidbular gland fossa

Immeditely under mylohyoid line = ?

Submandibular gland fossa

inf border of mandible

cornoid process

mandibular tori

pathology

mental foramen

loss of lamina dura

periapical abcess, granuloma, or cyst

Developing tooth

developing tooth