Teeth, jaw structure, lips in the lower part of the face are extremely important in aesthetic appeal and beauty. Especially in laughing and social mimics, the aesthetics of this region is extremely important.
Natomic areas in the evaluation of this area;
1. Evaluation of jaw bones and teeth
2. Evaluation of the lips
Evaluation of the 3rd chin
Evaluation of jaw bones and teeth
In the evaluation of the lower part of the face, the closure relations of the upper and lower jaws are extremely important in closing the mouth. Normally, the front teeth in the upper and lower jaws are involved in the closing of the mouth.
The teeth are arranged in an arc on the jaw. The dental arch in the upper jaw is wider than the dental arch in the lower jaw. Aesthetically and functionally, there should be no gaps between adjacent teeth in both arches. In addition, during the clenching of the teeth, there should be no gaps between the upper and lower teeth during the merging.
When the upper anterior incisors are evaluated, they are ahead of the lower incisors, this is called overjet.
An ideal jaw and tooth closure is shown below.
Apart from this ideal closure, defects such as the following may develop.
Class; The upper arch is slightly ahead of the lower arch, Class II; The upper arch is more anterior than the lower arch, Class III; The upper arch is farther back than the lower arch
During the closure of the teeth, the midlines of the upper and lower dental arches should be symmetrical. Its absence is called malocclusion. Aesthetically, asymmetry on this face will be reflected as a defect.
The upper incisors affect the upper lip and its position. This affects both the aesthetics of the lips and the position of the lips during laughing.
The anterior angulation of the incisors is extremely important. The following picture1 shows how the upper lip is directly affected by the angulation of the anterior incisors. The 2nd picture shows the anterior teeth angulation, the 3rd picture shows the ideal anterior teeth angulation, and the 4th picture shows the anterior teeth angulation backwards.
upper anterior teeth; It consists of 4 incisors, 2 canines and 4 premolars. These come into prominence aesthetically, especially during smiling. Their shapes, colors, symmetry, structure and appearance of the teeth are important.
The main jaw problems affecting facial aesthetics;
Elongation of the lower 1/3 of the face;
In these patients, the face is observed to be elongated and its width reduced. In addition, asymmetry on the outer edges of the lower jaw, cheekbones, under the eyes, cheeks and chin are flattened. The upper lips seem to be inverted, and their volume is reduced. The labiomental fold is flattened. The mandibular edge is erased and clockwise rotation is observed. The length of the chin-larynx-neck outline decreased with increasing cervicomental angle.
Shortening of the lower 1/3 of the face
There is a decrease in the height of the lower part of the face, but an increase in the middle and upper face regions. The nose appears longer. The upper lip rotates downward. The labiomental fold looks extremely deep and unnatural. The mandibular outer edge has counterclockwise rotation and is almost cocoontal, making the chin projection larger. The larynx is extremely short in length.
There may be inconsistencies between the middle and lat 1/3 of the face.
1. On the face, the middle section is behind, the lower section is ahead; The lower part of the face is located in the front and the middle part is located further back. total facial length increased. Cheeks, under the eyes, around the nose are flattened. The lower part of the nose seems normal, but the skeletal part seems inadequate. There is a clockwise rotation in the upper lip, so the volume appears less. The chin is slightly anterior, the labiomental fold is normal. The mandibular border line is prominent and shows clockwise rotation. The cervicomental angle is evident in the chin-larynx-neck outline.
2. Percent lower part back, middle part slightly anterior; The face appears convex. This is due to the clockwise rotation of the mandible. Flattening is observed in the malar, infraorbital, cheeks, paranasal and chin. It is observed that the larynx appears to be short with clockwise rotation in the outer line of the upper lip, flattening of the labiomental fold, clockwise rotation in the outer mandibular border and an increase in the cervicomental angle.