CPT CPT Radiographic Analysis & Bone Assessment 2

Question 1

On a periapical radiograph, the lamina dura represents:

Accepted Answer

The cortical bone lining the tooth socket

Answer

The lamina dura is the radiodense cortical bone lining the tooth socket; its presence or absence reflects periodontal health.

Question 2

A widened periodontal ligament (PDL) space on a radiograph may indicate:

Accepted Answer

Occlusal trauma or early periapical pathology

Answer

A widened PDL space may indicate occlusal trauma, early inflammatory changes, or periapical pathology affecting the supporting structures.

Question 3

Which radiographic view best demonstrates interproximal bone levels in posterior teeth?

Accepted Answer

Bitewing radiograph

Answer

Bitewing radiographs provide the best view of interproximal alveolar bone levels in posterior teeth due to their ideal horizontal angulation.

Question 4

Vertical (angular) bone defects on radiographs are characterized by:

Accepted Answer

Angular bone loss adjacent to one tooth root surface

Answer

Vertical angular bone defects appear as diagonal bone loss on one side of a tooth root rather than horizontal loss across adjacent teeth.

Question 5

For a periodontal patient, when should full mouth periapical radiographs (FMX) be updated?

Accepted Answer

Based on clinical findings and disease activity

Answer

Radiographic frequency for periodontal patients should be individualized based on disease activity, clinical findings, and treatment response.

CPT - Certified Periodontal Therapist Practice Test