Which age range corresponds to the second mesialization of the mandible?

Which age range corresponds to the second mesialization of the mandible?

• A. 2.6-3 years
• B. 4-6 years
• C. 9-10 years
• D. 12-14 years

Answer: (B)

In the growing mandible, teeth tend to drift mesially in two waves as the dentition shifts from primary to mixed dentition. The second mesialization occurs during the early mixed dentition, around four to six years of age. This period coincides with the jaw’s adaptation as primary teeth are in transition and permanent teeth begin to erupt, prompting a renewed mesial movement of posterior teeth to reestablish contacts and help accommodate the incoming dentition. Recognizing this timing is helpful for planning interceptive care, since noticeable space changes and occlusal adjustments are typical in this window. The earlier period (around 2–3 years) corresponds to the initial phase of dentition change, while the later ages (9–10, 12–14) are events in later mixed to permanent dentition stages.

In the growing mandible, teeth tend to drift mesially in two waves as the dentition shifts from primary to mixed dentition. The second mesialization occurs during the early mixed dentition, around four to six years of age. This period coincides with the jaw’s adaptation as primary teeth are in transition and permanent teeth begin to erupt, prompting a renewed mesial movement of posterior teeth to reestablish contacts and help accommodate the incoming dentition. Recognizing this timing is helpful for planning interceptive care, since noticeable space changes and occlusal adjustments are typical in this window. The earlier period (around 2–3 years) corresponds to the initial phase of dentition change, while the later ages (9–10, 12–14) are events in later mixed to permanent dentition stages.