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Abstract The aim of this study was to assess the relationship of ANB angle and Overjet in different sagittal skeletal malocclusions using Lateral Cephalometry or in another way the extent to which ANB angle can predict overjet using lateral Cephalometry Seventy Five Lateral Cephalograms fulfilled the inclusion criteria were classified according to ANB angle; Twenty Five for Skeletal Class I, Twenty Five for Skeletal Class II and Twenty Five for Skeletal Class III, were selected from archive of Oral Radiology department, Faculty of Dentistry, Suez Canal University Each radiographic film was traced using Dolphin™ Imaging orthodontic software Within individual classes of malocclusion according to ANB angle, the average values of ANB angle and overjet were calculated and their correlations tested. The extent to which ANB angle can determine overjet was assessed Summary and conclusions 74 from this study it was concluded that: 1- In class I, there is a weak non-significant correlation between ANB angle and overjet 2- In class II, there is a positive significant correlation between overjet and ANB angle 3- In class III, there is a weak to moderate significant correlation between ANB angle and overjet This study concluded that ANB angle is a good predictor for overjet significantly in class II but in class I and class III, ANB angle is a weak predictor for overjet due to dental compensation that occurs in upper and lower incisors. Still, there is a relatively wide interval variability, which cannot be explained by ANB angle alone. Probably, there are other important factors which were not included in this study and further research should be performed |