Root completion of the mandibular first molar takes place by the age_______________?
Correct answer: C. 9-10 years
- A. 7-8 years
- B. 8-9 years
- C. 9-10 years
- D. 10 - 11 years
Explanation
The mandibular first permanent molar erupts at about 6-7 years and completes its root approximately 2-3 years later, at 9-10 years.
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