What is overbite

People with regular facial features are often more likely to be liked by others. However, some people have big mouths, while others have small mouths. This is why we say that there are no two identical leaves in the world, and no two people who look exactly the same. The size of the mouth also affects people's appearance. Some people have overbite, but what is overbite? I believe that everyone is not particularly familiar with this issue, so let’s take a look at the relevant introduction.

The lips are composed of skin, orbicularis oris muscle and mucosa.

The free edges of the upper and lower lips together form the oral fissure, and the two ends of the oral fissure are called the corners of the mouth.

1. Lip structure:

The lips are located directly below the face. They are one of the important organs for chewing and speaking. They are also one of the important factors in facial beauty and can produce eye-catching and rich expressions. Medically, the range of the lips includes the upper and lower lips and the facial tissue around the oral cleft, from the bottom line of the nostrils above to the chin-lip groove below, and to the nasolabial groove on both sides.

The lips are divided into upper lip and lower lip. When closed together, there is only a horizontal seam, which is the oral fissure.

The two ends of the mouth are called corners of the mouth.

The lips are mainly composed of skin, orbicularis oris muscle, connective tissue and mucosa. There is a longitudinal groove in the middle of the upper lip, called the philtrum. This is a unique structure in humans and is also an essential factor in the beauty of the upper lip.

The upper and lower lips can be divided into three parts: one is the white lip; the second is the red lip; and the third is the mucous membrane.

2. Lip shape:

1. The height of the upper lip skin is generally divided into three categories: short upper lip, the upper lip length is less than 12 mm; medium, 12-19 mm; long upper lip: the upper lip is longer than 19 mm.

2. The lips can be divided into three categories according to their protrusion when viewed from the side: convex lips, in which the upper lip is obviously protruding forward; normal lips, which appear to be generally upright; and retracted lips, in which the lips are retracted backward.

3. Thick lips and thin lips. The thickness of the lips refers to the thickness of the upper and lower red lips when the mouth is gently closed. The thickness of the upper and lower lips is not exactly the same, with the lower lip usually being thicker than the upper lip. There is also a certain relationship between the thickness of the lips and the shape of the nose.

4. The width of the mouth cleft can be divided into three types. The width of the mouth cleft is less than 35 mm, which is a narrow type; the medium width of the mouth cleft is between 36-50 mm; the mouth cleft is larger than 50 mm, commonly known as a big mouth.

The so-called upturned boat mouth refers to lips with dark red color, high middle of lips and low ends of lips (mouth like an upturned boat).