[The flat vestibulum. Problems, indications for surgery, modification of vestibuloplasty and evaluation of success]

Among the aetiological factors of periodontal disease, the shallow vestibule plays a rather important role. The deviations from normal architecture may be subdivided into several forms. Surgical intervention is indicated in case of functional trouble which already exists if the blood supply is reduced by loading. A discussion of various operating techniques is followed by the description of a modification of the method of Edlan and Mejachar that has been used in more than 1000 cases up to now. The objectice evaluation of the results achieved justifies the recommendation of this technique.