Radiographic Evidence

Question 1

What does a normal interdental (bone) septum look like radiographically?

Answer 1

Angled from CEJ on the distal surface to the CEJ on the mesial surface of tooth behind

No bone loss - no vertical defects

Question 2

What type of bitewing is preferred for perio?

Answer 2

Vertical bitwing

Question 3

What cuases the PDL space to widen?

Answer 3

Vertical root fractures

scleroderma

occlusal trauma

Question 4

Radiographic evidence

Answer 4

Shows the amount of bone left
Does not indicate internal morphology
Does not show extend of facial linugal involvment

Question 5

Horizontal Bone loss

Answer 5

Loss of bone on both mesial and distal aspect of the tooth – giving a flat appearance

Question 6

Vertical Bone loss

Answer 6

Funnel shaped appearance
Plunge apically on one tooth surface

Question 7

Distribution of bone loss

Answer 7

Directs to the location of destructive local factors in relation to different surfaces of the same tooth

Question 8

Furcation defects

Answer 8

Loss of bone in molar teeth

Occurs due to:
* periodonitis
* endodontic infection
* root perforation during dental procedure
* occlusal trauma

Mostly seen in MANDIBULAR molar region – only 2 roots
If tooth is non vital –> endontic treatment before periodontic treatment

Question 9

How many roots do the maxillary molars have?

Answer 9

3
Furcation defects harder to assess (buccal furcation)
Disobuccal (Mesiobuccal) - palatal: easier to detect

Question 10

Loss of bone in the mesial and distal furcations of maxillary molars may present as ….

Answer 10

furcation arrows

Question 11

Cervical enamel pearl

Answer 11

can lead to bone loss
Low incidence – 1.1 - 9.7%

Question 12

Root proximity and bone loss

Answer 12

Close proximity of tooth roots will have THIN interproximal septum.

Leads to increased risk of bone loss and periodontal destruction

Question 13

Calculus and Radiographs

Answer 13

Radiograph is NOT a sensitive indicator of calculus
Very HEAVY deposits of calculus are seen radiographically

Question 14

Periodontal abscess

Answer 14

Acute - destructive process in the periodontium
localized collections of pus –> communicate with oral cavity via gingival sulcus

NOT ARISING FROM TOOTH PULP

Radiographically – discrete area along lateral aspect of root

Question 15

Aggressive Periodontitis

Answer 15

Rapid rate of attahcment and bone loss
Minimal local factors
Genetics

Question 16

Actual clinical bone loss id more than radiographic bone loss

Answer 16

TRUE