Oral synechia 2009-07-12T10:37:03Z Fibrous band between the mucosal surfaces of the upper and lower alveolar ridges. UMLS:C4023921 These bands must be distinguished from synechiaee between the tongue and palate (glossopalatal ankylosis) and from synechiae arising from the floor of the mouth (as in the subglossopalatal membrane), oropharyngeal isthmus (as in persistent buccopharyngeal membrane) or from the lower lip. If there is a complete soft tissue contiguity between the upper and lower alveolar ridges, the term, Fibrous syngnathia should be used instead. Synechiae of the mouth HP:0010285 Oral fibrous bands Abnormal oral mucosa morphology