Cleft Lip and Palate Clinical Trial
Official title:
Transverse Dento-skeletal Effects of Two Rapid Palatal Expansion Appliances in Cleft Lip and Palate Patients : A Randomized Clinical Trial
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 .
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