Abdallah I. Al-Saadeh, Faten H.K. Eid, Fatma A. Abdel-Sayed And Hala Munir,

ABSTRACT
This Project Was Aimed To Determine The Prevalence Of Malocclusion Among School Children In Giza Governorate.

Materials and Methods: This Study Was Carried Out In Giza Governorate Where A List Of The Primary Schools And The Number Of Primary School Children Were Obtained From The Database Of The Ministry Of Education. Giza Governorate Was Divided Into Ten Regions According To Geographical Location, Two Schools Were Chosen Randomly From Each Region Using SAS Computer Software Thus, 20 Schools Were Included In This Study And A Total Number Of 1900 Schoolchildren Were Included In This Survey.

Results: Distribution Of Angle Classification: This Study Showed That 392 Children (20.6%) Had Accepted Occlusion While, 1029 Children Had Angle Class I Malocclusion Representing (54.2%) Of The Study Sample, 300 Children Had Angle Class II Malocclusion Representing (15.8%) Of The Study Sample While 163 Children Had Class III Malocclusion Representing (8.6%) Of The Study Sample And 16 Children Had Class IV Representing (0.8%) Of The Study Sample. Overjet: The Most Frequent Category Was Normal Overjet (>0�3.5mm) Which Was Found To Be (60.5%). Anterior Open Bite (<0 Mm) Was Found In (6.9%) Of The Total Sample. Conclusion: Compared To Previous Egyptian Studies, There Was A Tendency Toward Decrease In The Prevalence Of Accepted Occlusion While, There Was An Increase In Angle Class II And III Malocclusions.