The Sensitive period for tetracycline induced discolouration in the permanent maxillary mandibular incisors and canines is________________?
Correct answer: A. 3 months postpartum to 7th year of life
- A. 3 months postpartum to 7th year of life
- B. 4 months in utero to 3 months postpartum
- C. 5 months in utero to 9 months postpartum
- D. Birth to 7th year
Explanation
Permanent anterior teeth are particularly vulnerable to tetracycline staining while their crowns are undergoing postnatal calcification, approximately from 3 months after birth through the seventh year. Exposure during this period allows tetracycline to bind calcium in developing dentine and enamel.
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