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WorksheetsFluorides
Total questions: 60
Worksheet time: 24mins
The mineral containing fluoride widely used in aluminium industry
Fluorspar
Cryolite
Fluorapatite
Hydroxyfluorapatite
The element fluoride was identified as the mysterious factor responsible for mottled enamel in
1901
1911
1921
1931
Which water fluoridation study emphasized the action of fluorides on smooth surface areas?
Grande Rapids Muskegon
Tiel Coleumberg
Newburgh Kingston
Canadian study
Mean plasma fluoride reaches its peak concentration after
15 mins
30 mins
45 mins
60 mins
The fluoride concentration in 2% NaF solution
7100 ppm
8100 ppm
9100 ppm
11100 ppm
The amount of fluoride present in Durpahat varnish is
600 ppm
2600 ppm
11600 ppm
22600 ppm
The four visit procedure for Knutson’s technique is recommended at the age of
1, 3, 5 and 11 years
3, 5, 7 and 11 years
3, 5, 7 and 13 years
3, 7, 11 and 13 years
The compound causing pigmentation after stannous fluoride application is
Stannous trifluorophosphates
Tin hydroxyl phosphate
Calcium fluoride
Calcium trifluorostannate
What is the amount of stannous fluoride added to 10 mL of distilled water to render it as 8% solution?
0.8 gm
8 gm
0.8 mg
80 gm
The intermediate product after Acidulated Phosphate Fluoride is applied on the teeth is
Calcium fluoride
Carbonated hydroxyapatite
Dicalcium phosphate dehydrate
Fluorapatite
The Certainly Lethal Dose of Fluoride is
8 - 16 mg/kg body weight
16 - 32 mg/kg body weight
32 - 64 mg/kg body weight
64 - 128 mg/kg body weight
Fluoride toothpastes are not safe for children of what age?
2 - 4 yrs
4 - 6 yrs
6 - 8 yrs
8 - 10 yrs
The recommended level for school water fluoridation is
0.7 - 1.2 ppm
1.5 - 3.0 ppm
4.5 - 6.3 ppm
3.0 - 4.3 ppm
A cation resin made out of sulphonated coal used in defluoridation of water is
Defluoron
carbion
Magnesia
Defluoron 2
The concentration of sodium fluoride mouthrinses for daily use is
0.2%
0.12%
0.5%
0.05%
Fluoride acts on which enzyme to render anticaries effect
Amylase
Phosphoenol pyruvase
Enolase
ATPase
Which of these replaces the inorganic component of the tooth in the presence of fluoride
Sodium
Potassium
Carbonate
Magnesium
The “Void theory” explains which anticaries effect of fluoride?
Decreased solubility
Improved crystallinity
Changes in oral bacteria
Improved morphology of tooth
Professionally applied fluoride products involve the use of fluoride concentration in the range of
2 – 5 mg F/mL
4 – 6 mg F/mL
5 – 19 mg F/mL
30 – 50 mg F/mL
The most widely recommended application time of fluoride varnishes is
once in a fortnight
once in a month
once in six months
once in a lifetime
The most commonly affected tooth with fluorosis is
Canine
Maxillary incisor
Premolar
Mandiubular incisor
The first sign of acute fluoride toxicity is
Increased salivation
Diarrhoea
Tetany
Abdominal pain
Dean’s fluorosis index records distinct brown stain at the score of
1.0
2.0
3.0
4.0
Use of milk as a vehicle for delivering fluoride was first reported by
Edgar
Zeigler
Wespi
Bowen
The second stage of Nalgonda technique of defluoridation is
Flocculation
Rapid mixing
Sedimentation
Filtration
Nausea as an acute toxicity adverse effect to fluoride is due to
(a)
Nalgonda technique is effective even when TDS is above
(a)
The safely tolerated dose in fluoride is
(a)
Sodium fluoride is not stored in glass bottles because of formation of
(a)
Solutions which are highly viscous when stored but become fluid under conditions of high stress are
(a)
In the canadian study of artificial water fluoridation, the natural control town
(a)
Dental fluorosis was termed “denti di chiaie” by
(a)
The level of fluoride necessary to cause skeletal fluorosis is
(a)
Acidulated phosphate fluoride is also called as
(a)
The compound which is formed when stannous fluoride is applied to tooth which cause anti cariogenic effect is
(a)
Technique of application of sodium fluoride solution is called
(a)
Death occurs in acute toxicity of fluoride due to
(a)
NEERI full form is
(a)
Fluoridated salt in Switzerland was fluoridated at the level of
30 mg fluoride per kg salt
50 mg fluoride per kg salt
70 mg fluoride per kg salt
90 mg fluoride per kg salt
In Nalgonda technique chemicals added to water are
(a)
1 parts per million fluoride means
(a)
Galagan formula is used calculate
(a)
Bitter sour taste is a disadvantage of
(a)
Which topical fluoride solution should be prepared freshly for each patient
(a)
A 3 - 6 yr old child having less than 0.3 ppm of fluoride in drinking water. The dosage of fluoride tablet for the child is
(a)
Safely tolerated dose is one fourth of certainly lethal dose
True
False
The disadvantage of Sodium fluoride topical fluoride solution is astringent taste
True
False
Concentration of fluoride in milk is 5 ppm
True
False
Salt fluoridation was introduced by Ziegler in Switzerland
True
False
The most expensive compound used in water fluoridation is sodium fluoride
True
False
The equipment which does not require maintenance by capable operator in water fluoridation is
(a)
(Any one) Mechanism of action of fluoride is
(a)
To adjust the pH in APF preparation we add
(a)
The widely used agent in dentifrices for caries prevention is
(a)
The compound which is corrosive in water fluoridation is
(a)
The drug of choice in case of fluoride toxicity is
Antispasmodic
Calcium chloride
Antiemetic
Acetazolamide
0.3 – 0.5 mL of varnish is equivalent to
1 – 4.9% mg F
6.9 – 11.5%mg F
8.9 – 15% mg F
9.0 – 16.1 % mg F
Predictions for future caries activity does not include
Past caries experience
Microbiological factors
Age
Weight
Which of the following about foam based APF agent is true?
Causes fluoride overdose risk
Higher amount of agent is required when compared to gel
Surfactant lowers surface tension and hence facilitates the penetration of the material
Not advised for young children and disabled people
Plasma fluoride concentration is lowest in which tissue
Brain
Lungs
Heart
Kidney
