الفهرس 
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Abstract
This study was conducted to evaluate clinically, the effect of lip repositioning surgery (LRS) versus Botox injection for patients with gummy smiles (GSs) as a two different treatment methods. Twenty healthy female patients with average 18-35 years old having EGD were selected then were divided into two equal groups as follow; group (1): in which their gummy smiles were treated by lip repositioning technique, group (2): in which their gummy smiles were treated by intramuscular injection of Botulinum toxin type A (BTX-A) at a pre-selected sites. The amount of gingival display was evaluated at the following intervals, 2 weeks, 1 month, 3 months, 6 months, 9 months and one year. The results of this study showed noticeable reduction in the amount of gingival display for all patients in both groups with no significant difference between them after 2 weeks, 1 month and 3 months of examination. After 6 months significant difference between them was recorded as in group (2) the effect of BTX-A was completely disappeared while patients in group (1) still having their EGD reduced. Nine months later, the effect of LRS also had been disappeared and the amount of EGD returned to the baseline value. After one year we have no patients to follow. The results after applying both modalities are transient, however LRS has more prolonged results than BTX-A.