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the line of flexure of the mucous membrane as it passes from the mandible or maxillae to the cheek.
Along the back wall of the mouth, the ridge of oral mucosa that runs from the maxilla (superiorly) or the mandible (inferiorly) to the cheek.
See also: fold
mu·co·buc·cal fold(myūkō-bŭkăl fōld)
Line of flexure of mucous membrane as it passes from mandible or maxilla to cheek.