Which group of teeth determines the second physiological elevation?

Which group of teeth determines the second physiological elevation?

• A. Temporary (primary) canines
• B. First temporary (primary) molars
• C. Lower incisors
• D. First permanent molar

Answer: (D)

The second physiological elevation is established when the first permanent molars erupt. These teeth are the first permanent teeth to come into occlusion and create a new posterior stop, reshaping the occlusal relationships as the dentition transitions from primary to mixed dentition. Their eruption sets the posterior bite and guides the subsequent eruption and alignment of the remaining permanent teeth. The other tooth groups belong to the primary dentition and shape the initial occlusion, but they do not establish this second occlusal elevation.

The second physiological elevation is established when the first permanent molars erupt. These teeth are the first permanent teeth to come into occlusion and create a new posterior stop, reshaping the occlusal relationships as the dentition transitions from primary to mixed dentition. Their eruption sets the posterior bite and guides the subsequent eruption and alignment of the remaining permanent teeth. The other tooth groups belong to the primary dentition and shape the initial occlusion, but they do not establish this second occlusal elevation.