The indicators on X-ray film and plaster model of Vietnamese children are also different from Caucasian children. The angles: SNA, SNB, ANB, FH / NPg are mostly within the mean value compared to Caucasian people; the width of maxillary of Vietnamese children is similar to Caucasian children, but the width of mandibular is much smaller; the Vietnamese children's tooth axis is much reclining and the teeth are more pointed, lips more protruding, nose angle is smaller and tip nose angle is more obtuse than Caucasian children.