INBDE (Integrated National Board Dental Examination) Practice Exam

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Permanent maxillary central incisor arises from how many lobes?

  1. 2

  2. 3

  3. 4

  4. 5

The correct answer is: 4

The permanent maxillary central incisor arises from four lobes. The development of a tooth from the dental lamina begins with the formation of lobes, which eventually fuse to form the complete tooth crown. In the case of the maxillary central incisor, it arises from four primary developmental lobes: one labial, one lingual, and two proximal (mesial and distal) lobes. These lobes gradually merge during tooth development to give rise to the final shape and structure of the tooth.