Abstract
Objective To evaluate the clinical outcome of miniscrews in treating bimaxillary protrusion patients with gummy smile. Methods Eight bimaxillary protrusion adults with gummy smile were selected for the study. Miniscrews were inserted in anterior and posterior alveolar process. The incisors were retruded and intruded by means of the miniscrew anchorage. The pre-and post-treatment cephalometric images and models were measured for the statistical analysis. Results Statistical significant differences were shown between the pre-and post-treatment incisor inclination (U1-SN: t = 11.993, P = 0.001; L1-MP: t = 6.439, P = 0.001) . After treatment, statistical significant differences were also shown in the vertical position of both upper and lower incisors (U1/PP: t = 2.591, P = 0.018; L1/MP: t = 4.339, P = 0.002) . The soft tissue profile and the gum exposure were improved (GSL: t = 3.198, P = 0.008) . Conclusion Placement of miniscrews in both anterior and posterior alveolar process to retrude and intrude the incisors is remcommended to bimaxillary protrusion patients with gummy smile. Key words: Miniscrew; Gummy smile; Bimaxillary protrusion
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