1. Temporary restoration of choice for reversible pulpitis is [MECEE 2077]
Zinc Phosphate
Zinc Polycarboxylate
Zinc Oxide eugenol
Calcium Hydroxide
Correct answer: C
Nisha Garg Page number 232
Zinc oxide eugenol cement is one of the oldest used cements. Though other cements are also used for temporization, but zinc oxide-eugenol cement is used most commonly because it is only mild irritant to the pulp, less soluble in oral fluids and produce better marginal seal than zinc phosphate.
2. Which of the following statement regarding embrasure is incorrect?
A. Incisal/occlusal embrasure increases in size from anterior to posterior teeth.
B. Cervical embrasure decreases in size from anterior to posterior teeth.
C. Incisal embrasure of maxillary lateral incisor and canine is longest.
D. Incisal embrasure of maxillary canine and premolar is narrowest
Correct answer: D
Nisha Garg page number no 32
Incisal embrasure of maxillary canine and premolar is widest.
3. Antimicrobial action of saliva is carried out by all of the above except
Lysozyme
Lactoperoxidases
IgG
Lactoferrin
Correct answer: C
Saliva is rich in IgA not IgG.
4. Untrue about fluoride content in a normal and decayed tooth is
Fluoride content is lesser in carious enamel and dentin as compared to a sound tooth.
Fluoride content in sound enamel is lesser than sound dentin.
Fluoride level and carious status of a tooth are independent and unrelatable
Dentin requires higher levels of fluoride for remineralization than enamel.
Correct answer: C
Nisha Garg Page number no 45
· In sound enamel and dentin, fluoride content is 410 ppm and 873 ppm, respectively.
· In carious enamel and dentin, fluoride content is 139 ppm and 223 ppm.
· Dentin requires higher levels of fluoride for remineralization (100 ppm) than enamel (5 ppm).
5. An instrument has an instrument formula
10-85-8-14. What is its primary cutting edge angle?
a. 85 degrees
b. 8 degrees
c. 8.5 degrees
d. 306 degrees
Ans: D (Ref: sturdevants 5th ed page no. 329)
· The second number of a four-number code indicates the primary cutting edge angle, measured from a line parallel to the long axis of the instrument handle in clockwise centigrades.The angle is expressed as a percent of 360 degrees (e.g., 85 = 85% × 360 degrees = 306 degrees). The instrument is positioned so that this number always exceeds 50.
1. 6.
The minimal cavosurface enamel margin of
a tooth preparation is
a. 300-400
b. 600
c. 90
d. 1400
Ans: C (ref: Sturdevants 7th edition page number 121)
· The nature of enamel formation requires that the preparation walls be, at minimum, oriented 90 degrees to the external surface of the enamel so as to maintain a continuous connection with the essential supporting dentin beneath. An enamel wall with this coniguration is able to withstand the forces associated with occlusal loading.
7. The preferred position for most of the dental procedures
Right Front Position
Right Position
Right Rear position
Direct rear position
Correct answer: C
Nisha Garg Page number number 151
Right-handed operator— preferred positions
· Right front or 7 o’clock
· Right or 9 o’clock
· Right rear or 11 o’clock
· Direct rear or 12 O’ clock