# The successor of the deciduous teeth develops from:
A. Lingual extension of the dental lamina
B. Labial extension of the dental lamina
C. Buccal extension of the dental lamina
D. Occlusal extension of the dental lamina
The correct answer is A. Lingual extension of the dental lamina
The initiation of the permanent first, second and third molars occurs at the fourth month of intrauterine life, one year after birth and five years after birth respectively. The lingual extension of dental lamina is called successional lamina. Successional lamina is responsible for the development of permanent incisors, canine and premolars. The successional lamina is active from the fifth month in utero (for the permanent central incisor) to ten months of age (second premolar).
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