Orthodontic treatment of a unilateral impacted mandibular canine and first premolar: a case report.

Background: Few dentists have seen an impacted mandibular canine and first premolar, and there is little information in the literature on the treatment of this rare condition.

Case Report: A 13-year-old Japanese male with an impacted mandibular right canine and first premolar was treated orthodontically. We discuss both the surgical and orthodontic options and present the successful orthodontic correction of a unilaterally impacted mandibular canine and first premolar.

Expansion of the mandibular arch in children during the mixed dentition period--a clinical study.

A review of the dental literature revealed relatively few studies on the expansion of the mandibular dental arch. The present study attempted expansion of the mandibular arch using a Bihelix appliance. The subjects were 16 children, exhibiting crowding, age ranges from 7 to 11 years.