DRC DRC Pathology & Radiographic Diagnosis 2

Question 1

External root resorption on a radiograph is identified by:

Accepted Answer

Blunting or shortening of the root apex with an irregular outline

Answer

External root resorption appears as blunting, shortening, or irregular destruction of the root outline, typically at the apex or along the lateral surfaces.

Question 2

Internal root resorption is radiographically characterized by:

Accepted Answer

An oval or round radiolucency within the root canal space

Answer

Internal root resorption appears as a well-defined oval or round radiolucency within the root canal, caused by clastic cells resorbing the dentin from the inside.

Question 3

A dentigerous (follicular) cyst appears on a radiograph as a:

Accepted Answer

Well-defined radiolucency surrounding the crown of an unerupted tooth

Answer

A dentigerous cyst appears as a well-defined, corticated radiolucency that surrounds the crown of an unerupted (impacted) tooth, attached at the CEJ.

Question 4

Calculus deposits on dental radiographs appear as:

Accepted Answer

Irregular radiopaque projections on the root surface between the teeth

Answer

Calculus appears as irregular, nodular, or pointed radiopaque deposits on the root surfaces, most commonly visible interproximally on bitewing radiographs.

Question 5

Vertical bone defects (angular bone loss) visible on radiographs indicate:

Accepted Answer

Localized, asymmetric bone destruction associated with advanced periodontal disease

Answer

Vertical (angular) bone loss indicates localized, asymmetric bone destruction along the root surface, often associated with aggressive or advanced periodontal disease.

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

DRC DRC Pathology & Radiographic Diagnosis 2