What is Ridgemapping

The patient is given local anesthesia by infiltration to numb both the  facial (labial/buccal) and  lingual (palatal) mucosa. Using either a sharp straight probe with stopper, endodontic file or a specially designed calliper the mucosa is perforated through to the residual bone and the thickness of mucosa is marked at the designated areas 2 mm apart.  These marks are defined by objective reference points to be transferred accurately to the split cast and based on the measurements of the tissue, the contour of the residual ridge is traced on the cut face of the cast