الفهرس 
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Abstract
Distraction osteogenesis of collapsed maxilla in cleft palate
patients has become of the contemporary surgical management of many secondary cleft deformities
The aim of this study was to assess the use of transpalatal distraction osteogenesis for 3D correction of maxillary hypoplasia in unilateral cleft palate patients both clinically, radiographically and by the study cast .This study was comprised one group treated by RPE distraction
osteogenesis with unilateral Le-Forte I osteotomy and disjunction of pterygoid plate. The group comprised (12) patients (5) males and (7) females with unilateral maxillary hypoplasia after repair of unilateral cleft lip and palate. The age ranged from 14 to 27 years with a mean of 16.88 years. The patients were assessed clinically, radiographically and study
cast and data were collected, tabulated and statistically analyzed.The results of this study shows significant difference between the pre and
post distraction in the form of:
1 RPE distraction osteogenesis of collapsed maxilla in cleft palate
patients give a good results without relapse due to complete freeing of the affected side by Le-Forte I and pterygoid plate disjunction and
adequate consolidation period. Segmental maxillary tipping does no
affect relapse in RPE distraction.
2. The oblique position of the RPE D allowed the three dimensional correction of the affected maxilla.