Abstract
Dental care for a Japanese girl who had protrusion of the upper anterior teeth caused by swallowing habits with lip biting and scissors bite which developed during occlusal treatment, was rendered with the removable appliances from 8 years-8 months of age to the permanent dentition period. At 9years of age, a removable biteplate was used for breaking the oral habit and improving the upper anterior protrusion. At 10 years-6 months of age, the protrusion was improved, but the scissors bite of the right premolars developed due to the excessive dimension of the maxillary dental and basal arch width. A removable appliance for reducing the maxillary dental arch width was designed by utilizing an expansion screw reversely and she started to use it at 10 years-11 months of age. She used this appliance for 5 months, and the sicssors bite was corrected. After using a retainer for 10 months, the treatment ended. Since these removable appliances functioned suitably and the compliance of the patient to the treatment was satisfactory, an esthetically as well as sufficiently functional permanent occlusion was established.
