Question 126 · LDEK · Fluoride
Indicate the true statements concerning fluoridated varnish:
1) use of fluoridated varnish in children below the age of 6 years poses a risk of tooth fluorosis development;
2) high level of fluoride in enamel is kept for 1-7 days after varnish application;
3) high level of fluoride in enamel is kept for 10-15 minutes after varnish application;
4) reduction of caries in permanent teeth is 46%;
5) periodic varnish application can induce mild symptoms of acute fluoride intoxication.
The correct answer is:
2) high level of fluoride in enamel is kept for 1-7 days after varnish application;
3) high level of fluoride in enamel is kept for 10-15 minutes after varnish application;
4) reduction of caries in permanent teeth is 46%;
5) periodic varnish application can induce mild symptoms of acute fluoride intoxication.
The correct answer is:
- A. 1,3,5.
- B. 1,2,4.
- C. 3,4.
- D. 2,4.
- E. 3,5.
Hint
Compare how long a varnish stays on enamel with gels or rinses, and recall the Cochrane estimate of caries reduction in permanent teeth.
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