Let me introduce you to a term-dental arch. On the fleshy red glue, the dental arches arranged in a certain direction, position and order are called dental arches.

Expanding the arch is to expand the dental arch so that the upper teeth can have a comfortable position. The purpose of arch expansion is to obtain the gap needed in orthodontics, generally to expand the width and length of maxillary and mandibular dental arches.

The arch is expanded by orthodontics, mainly by moving the posterior teeth on both sides to the buccal side. A gap of 1-2mm can be obtained on each side, and the teeth can be moved to the correct position by using this gap, thus completing orthodontics.

Although the dental arch is widened, its expansion distance is very limited, so it won't change the width of the base bone as a whole, and it won't expand the width of all the bones in the maxillofacial region, so friends don't have to worry about getting bigger!

Second, the principle of action of bow dilator

The arch expander is an auxiliary tool to enlarge the dental arch. Its main function is to adjust the size of the dental arch, make the teeth grow in a suitable position, and then slowly align them, thus avoiding the situation of tooth extraction.

The arch expander is mainly aimed at patients whose maxillary arch is too small and needs orthodontics. Generally speaking, it is mainly used for pre-orthodontic treatment of growing adolescents (especially those before 15), but with the gradual expansion of indications, it is gradually used for young and middle-aged patients.

Bow dilator

For children with narrow maxilla and at the peak of growth, we can gradually open the middle palatine suture to promote the connective tissue of the middle palatine suture to produce new bone tissue after being stretched, thus increasing the width of the base bone and dental arch. Generally speaking, the younger the patient is, the more obvious the new bone deposition is, and the widening of the basal bone is easier to achieve.

On the contrary, for older adult patients, if the arch expansion appliance is used only, the widening of dental arch is more the result of buccal movement of teeth. At this time, if we cooperate with maxillofacial surgery to suture the palate first and then expand the arch, the curative effect will be better.

Third, the crowd is a magnifier.

Bow dilator is mainly suitable for the following people:

1. Bilateral or unilateral maxillary and mandibular arch stenosis.

2. The anterior segment of mandibular arch is shortened due to the inclination, crowding or congenital absence of incisors.

3. As the molars move forward, the length of dental arch is shortened.

However, not everyone can correct it with arch expansion. For example, friends with big teeth are not suitable for arch expansion, and everyone's oral and periodontal conditions are different, so we can't generalize! Return to Sohu to see more.