MCQs on Bleaching of Teeth

# Discoloration of tooth in tetracycline therapy is due to the formation of:
A. Calcium orthophosphate
B. Dicalcium phosphate dihydrate
C. Calcium oxide
D. Tetracalcium phosphate

# Microabrasion is a procedure in clinical orthodontics performed to:
A. Clean the bracket base
B. Clean the archwire
C. Polishing the bracket
D. Removal of white spot lesions

Composition of the Compensation Committee - Consumer Protection Act 2054, Nepal

A Compensation Committee as follows shall be formed in each district in order to conduct inquiry into complaints filed underSection 22 and realize compensation in consideration of losses or damages suffered by the consumer:

(a) Chief District Officer - Chairperson
(b) District Attorney - Member
(c) District Medical Officer - Member
(d) A representative of the District Consumers Association designated by Government of Nepal - Member
(e) Representative, District Chamber of Commerce and Industry - Member
(f) An officer designated by Government of Nepal - Member-Secretary

Prevention of Dental Caries

#MCQ 25- The best method to prevent initiation of caries in a four year old child who has no accessibility to community water fluoridation is:
A. Brushing and flossing
B. 2.2 % NaF Tablet daily
C. 0.05% NaF Mouthwash daily
D. 0.5% NaF toothpaste daily

Answer: B. 2.2 % NaF Tablet Daily

Option 'A' - Adequate Dexterity for proper toothbrushing isn't developed until 10-12 years of age as brushing is a complex skill. For flossing, an adult should perform flossing on the child.

Option 'C' - Fluoride mouth rinses should not be used by children below 6 years as they are not capable of rinsing adequately due to lack of reflex control of swallowing.

Option 'D' - Sodium Fluoride Dentifrices failed to show significant caries reduction. The world's most widely used fluoride is combination of sodium monofluorophosphate (MFP) and insoluble metaphosphate. Currently available dentifrices contain 900 or 1000 ppm (0.76% Sodium MFP) for adults and 500 ppm fluoride concentrations for children.

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#MCQ 24 : Dental Stone and Dental Plaster both have a slightly different type of principal component (Calcium sulfate hemihydrate). Dental Plaster has:

#MCQ 24 : Dental Stone and Dental Plaster both have a slightly different type of principal component (Calcium sulfate hemihydrate). Dental Plaster has:

A. Beta-hemihydrate and dental stone has gamma hemihydrate
B. Alpha hemihydrate and dental stone has beta hemihydrate
C. Gamma hemihydrate and dental stone has beta hemihydrate
D. Beta hemihydrate and dental stone has alpha hemihydrate

Answer D. Dental Plaster has beta hemihydrate and dental stone has alpha hemihydrate.

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