侧面观Lateral view :高角病例呈开张面型, 面 下1/ 3 长,凹面型多见, 上唇 较厚, 颏部和颏唇沟均不明 显, 头位略前伸; High anglecases, length of the lower 1/3 of the face is long, the concave type profile more common, thick upper lip, chin and chin lip groove are not prominent.
低角病例呈聚合面型, 面 下1/ 3 段短, 凸面型多见, 上唇较薄,颏部和颏唇沟明 显。 low-angle cases the lower1/3 of the face generally shorter convex facial profile, thin upper lip, chin and chin lip groove are prominent.10