According to Schour & Massler the crown completion of both permanent maxillary and mandibular first molars is________________?
Correct answer: B. 2½ - 3 years
- A. 1½ 2 years
- B. 2½ - 3 years
- C. 3-4 years
- D. 3-5 years
Explanation
According to the Schour and Massler chronology, the crowns of the permanent first molars are completed at approximately 2½ to 3 years. Root formation continues after crown completion.
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