they distinguish three anomalies which may , separate or in association , cause an increased vertical dimension of the face : hypsomaxillia , hypsogenia and inter incisal anterior vertical gap or hyposostomy , which may itself be differentiated into 3 aetiological sites ( vertical posterior maxillary dento-alveolar excess , vertical anterior mandibular dento-alveolar deficiency , excessive gonial angle opening or amblygonia ) .
C0015450
face
C0024687
mandibular