[Studies on the mobility of soft tissue marks of the lower face]

The mobility of soft tissue points used for measuring the rest vertical dimension was assessed in 29 probands with full dentitions and 24 edentulous subjects. A video-aided procedure was used for recording the measuring pictures. Similar results were obtained with fully dentulous and edentulous subjects. For the upper jaw the point of the nose was the mark undergoing the least fluctuations, due to the action of the mimic muscles. For the lower jaw the least mobile skin area was between the labiomental sulcus and the gnathion.