Abstract
Different techniques have been used to correct anterior and posterior crossbites in mixed dentition. This case report illustrates the treatment of anterior and unilateral posterior crossbites during the mixed dentition. The patient was a 9-year-old boy with a crossbite of the maxillary right permanent central incisor and a unilateral right posterior crossbite, both expressed by a functional shift in the sagittal and transverse dimensions. Two upper acrylic removable appliances, each with an expansion jackscrew, were used to correct the crossbites. The total active treatment time was 4months; the treatment outcomes were successfully maintained for the subsequent 4months. General and pediatric dentists, as well as orthodontists, may find this technique useful in managing crossbite cases of the mixed dentition and utilizing the discussion and illustrations for further clinical guidance.