Characteristics help to recognize what is not normal.

A Normal Face is one that:

• Has good proportions
• Is symmetrical to the midline
• Neither the upper or the lower jaw protrudes
• The mandible does not deviate sideways
• The lips are a bit behind an imaginary line joining the tip of the nose to the chin
• The smile reveals as many as possible of the back teeth while the upper front teeth do not protrude from the lips
• There are no intense muscle contractions

A Normal mouth is one where:

• Upper and lower jaws show proper development and are in good relations amongst one another on all three dimensions.
• The teeth are in good positions and form two beautiful arches, the upper one being slightly wider than the lower one.
• The midline of the upper teeth coincides with the midline of the lower ones