Abstract
This case report describes the process of occlusal treatment of two boys with scissors crossbite occlusion in the primary dentition. Their treatment was started at 4 years, one month of age at Kyushu University Hospital, and at 5 years, eight month of age at Kagoshima University Hospital respectively. Unique appliances were developed for the early treatment of the morphological and functional elements in these cases.
The following re sults were obtained:
1. Normal primary occlusion was achiev ed about two months after the start of treatment. The period of treatment was drastically shortened by using the method of unilaterally constricting the upper primary molars and unilaterally expanding the lower primary molars simultaneously.
2. The partial bite plate of the appliance was quite effective for the treatment of scissors crossbite with unilateral deep-bite occlusion in the primary molar region.
3. Both cases are still maintaining the normal dentition and occlusion.
