Transverse Dento-skeletal Effects of Two Rapid Palatal Expansion Appliances in Cleft Lip and Palate Patients

Overview

Aim of the study: to compare the effect of Hyrax appliance and the Haas appliance improving the transverse skeletal and dental dimensions in cleft lip and palate patients during mixed dentition.

•Steps in short Full records pre-treatment. Bands selection for upper first molars then construction of expansion appliances(Haas or Hyrax) . Delivery of appliances and instructions to the patients and their parents about their activation regimen 2 quarter turns in the morning and 2 in the evening.The posterior crossbite will be measured as the distance from the palatal cusp tips of upper first molars to central fossae of lower first molars then the needed time for expansion will be calculated .When the time calculated for correction ends, we will stop activation, we will take impressions for digital models to see if real expansion occurred or not and so testing the efficiency of the two appliances. Afterthat, if correction was not yet achieved, activation of the appliances will continue till overcorrection at the molar region with the palatal cusp tip of the maxillary posterior teeth contacting the buccal cusp tip of the mandibular posterior teeth. We will then leave the appliance insitu for retention. After 6 months from the first CBCT we will take a second CBCT to see any bony changes .

Conditions

Interventions

Eligibility

Outcomes

Central Contacts