Sagittal skeletal evaluation for a group of egyptian school children using beta angle

Proper and accurate diagnosis is the key to successful treatment in onhodontia. Although several angular and linear measurements were proposed to provide an accurate assessment of sagittal skeletal jaw relationships, most of them were deficient in either validity or reproducibility. Recently a new cephalometric measurement named Beta angle was said to overcome the drawback of other measurements in sagittal skeletal jaw relationships assessment. Accuracy of Beta angle was studied in the present research regarding its validity and reproducibility. Its accuracy was confirmed and consequently mean values were computed for a group of Egyptian school children having different sagittal skeletal jaw relationships, Egyptian children [9-10 years] with Beta angle 32° +/- 2.5 have a class J skeletal pattern and with Beta angle 27° +/- 1.9, have a class JI skeletal pattern while with Beta angle 43.1° +/- 3,4 have a class III skeletal pattern. There was no sex difference regarding the Beta angle. Beta angle did not specify the affected jaw in class II and Class III patterns so additional measurements will be needed