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Pterygomandibular Raphe — MFDS Part 1 MCQ

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HardAnatomy (Head & Neck)Pterygomandibular RapheMFDS Part 1

During preparation for an inferior alveolar nerve block, the pterygomandibular fold is identified intraorally. Which option correctly describes the standard anatomical attachments of the underlying pterygomandibular raphe and its relationship to adjacent muscles?

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Correct answer: A — Pterygoid hamulus to the posterior end of the mylohyoid line; buccinator anteriorly and superior pharyngeal constrictor posteriorly

A is correct. In standard descriptive anatomy, the pterygomandibular raphe extends from the pterygoid hamulus superiorly to the posterior end of the mandibular mylohyoid line inferiorly. It forms the junction between the buccinator anteriorly and the superior pharyngeal constrictor posteriorly. Option B gives the attachments of the sphenomandibular ligament. Option C confuses the scaphoid-fossa origin of tensor veli palatini with the raphe. Option D incorrectly substitutes the maxillary tuberosity and middle constrictor, while E combines unrelated attachments of the muscles of mastication. Cadaveric studies show that this region may form a broad or incomplete fascial interface rather than a constant narrow cord, but A remains the accepted conventional description used in dental anatomy examinations.

Reference: Sun X et al. A Comparative Analysis of Endoscopic-Assisted Transoral and Transnasal Approaches to Parapharyngeal Space: A Cadaveric Study. J Neurol Surg B Skull Base. 2018; Figure 4 anatomical description. https://pubmed.ncbi.nlm.nih.gov/29765820/