اسئلة الاختبارات

For lower premolars, the purpose of inclining the handpiece lingually is to 

Avoid buccal pulp horn Avoid lingual pulp horn Remove unsupported enamel Conserve lingual dentine

For an amalgam Restoration of weakened cusp you should

Reduce cusp by 2mm on a flat base for more resistance Reduce cusp by 2mm following the outline of the cusp Reduce 2mm for retention form

Before filling a class V abrasion cavity with GIC you should

Clean with pumice, rubber cup, water and weak acid Dry the cavity thoroughly before doing anything Acid itch cavity then dry thoroughly

Which of the following statement about the defective margins of amalgam restoration is true?

The larger the breakdown, the greater the chance of decay.

The retention Pin in an amalgam restoration should be placed

Parallel to the outer wall Parallel to the long axis of tooth

The most common cause of failure of the IDN “Inferior Dental Nerve” block is

Injecting too low Injecting too high

Which one of the following are not used in water fluoridation

SnF2
1.23% APF
H2SiF2
CaSiF2
8% Stannous fluoride

The best way to clean cavity before the placement of GIC is

H2O2 Phosphoric Acid Polyacrylic acid

1

9. The most mineralised part of dentine is

A. Peritubular dentine

10. A 45 year old patient awoke with swollen face, puffiness around the eyes, and oedema of the upper lip with redness and dryness. When he went to bed he had the swelling, pain or dental complaints. Examination shows several deep silicate restorations in the anterior teeth but examination is negative for caries, thermal tests, percussion, palpation, pain, and periapical area of rarefaction. The patient’s temperature is normal. The day before he had a series of gastrointestinal x- rays at the local hospital and was given a clean bill of health. The condition is

A.              Acute periapical abscess

B.               Angioneurotic oedema

C.               Infectious mononucleosis

D.              Acute maxillary sinusitis

E.               Acute apical periodontitis

11. Internal resorption is

A.              Radiolucency over unaltered canal

B.               Usually in a response to trauma

C.               Radiopacity over unaltered canal

12. On replantation of an avulsed tooth could see

A. Surface resorption, external resorption B. Internal resorption
C. Inflammatory resorption
D. Replacement resorption

E. A,CandD
F. All of the above

13. The percentage of total dentine surface dentinal tubules make in 0.5mm away from pulp is

A.              20%

B.               50%

14. The junction between primary and secondary dentine is

A.              A reversal line

B.               Sharp curvature

C.               A resting line

D.              A reduction in the number of tubules