1. PATHOLOGICAL wearing of tooth structure from external abnormal mechanical processes, not occlusion often tooth brushing, objects b/w teeth

A. Abfraction
B. Erosion
C. Abrasion
D. Attrition

Answer:c

2. affects occlusal, incisal, proximal surfaces

A. cuase of internal resorption
B. clinical feature of hypercementosis
C. cuase of external resorption
D. clinical feature of attrition

answer:D

3. PHYSIOLOGIC wearing of teeth as a result of occlusion

A. Abfraction
B. Attrition
C. Abrasion
D. Resorption

Answer:B

4. smooth, polished depression, above CEJ in cervical region labial surfaces affected for ingested substance lingual surface from regurgitation/vomiting

A. cementicles
B. true denticle
C. hyper cementosis
D. erosion signs

answer: D

5. increases with age, more severe in men, associated with high fibre, bruxers, tobacco chewers

A. etiology of Erosion
B. Attrition in adults
C. Signs of Abrasion
D. Features of ankylosis

Answer:B

6. What is dental erosion?

A. tooth decay;
B. dissolving of tooth enamel by acids in food or drink;
C. destruction of tooth material by wear;
D. attacks on teeth by bacteria

answer: B

7. working in acidic environment ingesting highly acidic substance (sucking lemons) bulima nervosa, GERD idiopathic

A. Signs of Abfraction
B. etiology of Erosion
C. tooth brush attrition
D. other attrition patterns

answer:B

8. How long should you wait before brushing after consuming acidic foods or drinks?

A. 10 minutes;
B. 20 minutes;
C. 30 minutes to an hour
D. eight hours

answer:C

9. loss of tooth structure, due to repeated tooth flexure from occlusal stresses, since dentin withstands tensinle stress better than enamel

A. Abfraction
B. Erosion
C. ankylosis
D. Attrition

Answer:A

10. wedge shaped defect in cervical area, often single tooth, subgingival lesions, facial surface

A. Features of ankylosis
B. etiology of Erosion
C. Attrition in children
D. Signs of Abfraction

Answer:D