الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Functional unilateral posterior crossbite (FUPX) is the most common form of posterior crossbite with a shift of the mandible towards the crossbite side. The debate went on through years about whether, this type of malocclusion causes asymmetrical mandibular growth alteration or asymmetrical condylar position within the glenoid fossa.
Since the maxillary constriction is the one of the vital causes of FUPXB, so another inquiry needs to be answered about if maxillary expansion can serve to overcome this type of malrelations.
MSCT with 3-D Re-constructions is one of the recent imaging modalities, giving accurate measurements with real values and free from any superimpositions.
Fifteen subjects having FUPXB malocclusion were selected in this study. Axial, coronal, sagittal and oblique lateral cuts were taken for the condyle, the mandible and the maxilla bilaterally with a 3-D Re-construction. Measurements of condylar variables, skeletal and dental measurements of the maxilla and mandible were conducted and statistical analysis was undergone to assess mandibular symmetry, maxillary symmetry and condylar position in those patients using MSCT. Also, evaluation of the effect of Rapid Maxillary Expansion (RME) on the condylar position in the same patients using MSCT.