Gummy Smile Causes:
First it may be a result of delayed eruption. The second possible cause is compensatory eruption of the maxillary teeth
with concomitant coronal migration of the attachment apparatus. The third possibility is vertical maxillary excess in which
there is an enlarged vertical dimension of the mid-face and "incompetent" lips. Finally, when the patient smiles, if the
upper lip moves in an apical direction and exposes the dentition and excessive gingivae, then surgical lip repositioning may be
This procedure was first described in the plastic surgery literature in 1973 and was recently published in the dental
"It is important to established the etiology responsible for the
excessive gingival display."
Surgical lip repositioning is an effective procedure to reduce gingival display by positioning the upper lip in a more coronal
location. The long-term stability of the results remains to be seen, but it holds promise as an alternative treatment modality in esthetic rehabilitation.