The functional treatment of anterior-open bite: three case reports

Functional treatment of three skeletal open-bite patients with Bionator, Frankel IV and Posterior bite-block appliances is presented. Pretreatment and post treatment records were evaluated. Correction of malocclusion by changing direction of the mandibular development, adaptive bony development of the condyle, vertical development in posterior region, an increase in ramus length, a decrease in the lower facial height were observed in this report. The results of functional treatment of three appliances had different effect mechanisms.