INBDE (Integrated National Board Dental Examination) Practice Exam

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How is the cingulum of maxillary central incisors oriented?

  1. Off-centered to the right

  2. Off-centered to the left

  3. Centered

  4. Irregularly

The correct answer is: Centered

The cingulum of maxillary central incisors is typically centered on the tooth. The cingulum is a bulge on the lingual aspect of the tooth near the cervical third, and in the case of maxillary central incisors, it is usually symmetrical and positioned in the center of the tooth. This anatomical feature helps in achieving proper function and esthetics for the tooth. Option C is the correct answer. Options A and B are incorrect because the cingulum of maxillary central incisors is not off-centered; it is centrally located. Option D, irregularly, is also incorrect as the cingulum is typically symmetrical and centered.

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