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pterygomandibular raphe (anatomy)
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On each side, the pterygomandibular raphe passes between the tip of the hamulus of the pterygoid bone and the internal surface of the mandible at a point just posterosuperior to the posterior limit of the mylohyoid ridge. It is formed by the union of the tendinous ends of the superior constrictor of the pharynx and buccinator.

As the mandible moves relative to the hamulus, the length of the raphe is passively increased.