Oral Biol Res 2018; 42(2): 90-96  https://doi.org/10.21851/obr.42.02.201806.90
Treatment of excessive gingival display using modified lip repositioning technique with esthetic crown lengthening: Case reports
Gwi-Hyeon Min1 , Sang-Joun Yu1,2 , Byung-Ock Kim1,2 , and Won-Pyo Lee1,2*
1Department of Periodontology, School of Dentistry, Chosun University, Gwangju 61452, Republic of Korea
2Oral Biology Research Institute, Chosun University, Gwangju 61452, Republic of Korea
Correspondence to: Won-Pyo Lee
Department of Periodontology, School of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
Tel.: +82-62-220-3850, Fax: +82-62-224-4664
E-mail: wplee8@chosun.ac.kr
Received: April 23, 2018; Revised: May 17, 2018; Accepted: May 29, 2018; Published online: June 30, 2018.
© Oral Biology Research. All rights reserved.

Abstract
Excessive gingival display that can be seen when a person smiles can cause non-esthetic problem. This gummy smile is mainly caused by an altered passive eruption, bony maxillary excess, and excessive maxillary lip mobility. Thus far, an altered passive eruption has been successfully treated using esthetic crown lengthening. Recently, an alternative to orthognathic surgery has been proposed for the treatment of a gummy smile. Studies using a lip repositioning procedure have actively been performed. In this report, we present three cases of treatment for excessive gingival display using the modified lip repositioning technique associated with esthetic crown lengthening.
Keywords: Crown lengthening, Esthetics, Gummy smile, Lip repositioning


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