| Summary: | <b>Purpose:</b> In recent years, a method for improving gummy smiles in adults using an orthodontic anchor screw has been reported, but there is yet to be a treatment for the gummy smiles of those in the growth period. <b>Methods:</b> We improved the gummy smiles of three class II patients with vertical excessive growth of the upper jaw, during their growth period, using a simple bite jumping appliance (SBJA) and a high pull J-hook headgear. <b>Results:</b> It was found that SBJA promoted mandibular growth and the high-pull J-hook headgear inhibited the vertical growth of the maxillary anterior teeth. <b>Conclusion:</b> It is suggested that a combined use of high-pull J-hook headgear and SBJA is an effective way of improving gummy smiles in class II patients with vertical excessive growth of the upper jaw during their growth period.
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