Dental Radiography Module 9

Question 1

levels of caries…?

Answer 1

Early, enamel lesions with intact surfaces (1st degree = D1)
• Moderate, enamel lesions (2nd degree=D2)
• Advanced, Lesions in dentine (3rd degree=D3)
• Extensive, Lesions in pulp (4th degree=D4)
D1 and D2 normally managed using preventative measures
D3 and D4 require treatment

Question 2

location of caries…..?

Answer 2

Occlusal, incisal
• Proximal
• Lingual, palatal
• Facial
• Cemental
• Recurrent
• Rampant

Question 3

Lamina Dura…?

Answer 3

A thin radio-opaque layer of dense bone surrounding the tooth
socket
It is thicker than the surrounding Trabecular bone and thickness
increases in amount in the occlusal stress

Question 4

Alvelolar Crest….?

Answer 4

The gingival margin of
the Alveolar process that
extends between the
teeth is apparent on
radiographs as a
radiopaque line called
Alveolar crest.

Question 5

Periodontal ligament space…..?

Answer 5

PDL space is primarily composed of collagen, so appears as

radiolucent space between tooth root and lamina dura.

Question 6

cancellous bone….?

Answer 6

Lies between the cortical plates in both the jaws.
It is composed of thin radiopaque plates and rods
surrounding many small radiolucent marrow spaces

Question 7

Landmarks of the Maxilla…….?

Answer 7

Median palatine
suture
•Nasal fossa
•Nasal septum
•Anterior nasal spine
• Incisive foramen
• Lateral fossa
•Maxillary sinus
•Maxillary tuberosity

Question 8

Landmarks of the mandible….?

Answer 8

Lingual foramen
Mental ridge
Mental foramen
Mental fossa
External oblique line
Internal oblique line
Mylohyoid line
Mandibular foramen
Inferior dental canal
Submandibular gland fossa