Anatomy & Histology · single question

Which nerves must be anesthetized to extract tooth #8 (maxillary right central incisor)?

  1. Anterior superior alveolar nerve (ASA) and nasopalatine nerve
  2. Anterior superior alveolar nerve (ASA) and greater palatine nerve
  3. Middle superior alveolar nerve and nasopalatine nerve
  4. Infraorbital nerve and nasopalatine nerve
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Correct answer: A. Anterior superior alveolar nerve (ASA) and nasopalatine nerve

To extract tooth #8 (maxillary right central incisor), two nerves must be anesthetized: (1) the anterior superior alveolar (ASA) nerve, which supplies the buccal/labial soft tissues and the tooth pulp of the maxillary central and lateral incisors; and (2) the nasopalatine nerve, which supplies the palatal mucosa and gingiva of the anterior maxillary teeth (central incisors to canines). The greater palatine nerve supplies the posterior palatal mucosa (premolars and molars) and is not required for central incisor extraction.

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