Oral Surgery · single question

Which nerves are anesthetized for the extraction of maxillary tooth #1 (upper right third molar)?

  1. Posterior superior alveolar nerve and greater palatine nerve
  2. Inferior alveolar nerve and lingual nerve
  3. Anterior superior alveolar nerve and nasopalatine nerve
  4. Infraorbital nerve and nasopalatine nerve
Show answer and explanation

Correct answer: A. Posterior superior alveolar nerve and greater palatine nerve

The original question refers to '#8' which in the Universal Numbering System is the maxillary right central incisor, not the third molar. However, given the context (extraction requiring IAn/lingual vs. PSA), this question appears to be asking about the maxillary third molar (#1 in Universal Numbering). For maxillary molar extraction, the posterior superior alveolar (PSA) nerve block anesthetizes the buccal aspect and pulp of the upper molars, while the greater palatine nerve block covers the palatal soft tissue. The inferior alveolar nerve and lingual nerve (option b) are used for mandibular third molar extractions (#17 or #32).

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