Tooth extraction is required for orthodontics

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Orthodontic tooth extraction is very common. Although orthodontic tooth extraction is principled, there are also some tooth friends who are confused about why some people pull out No. 4 teeth, some pull out No. 5 teeth, and some pull out wisdom teeth? Let's see the difference.

Let's first look at the principles and standards of orthodontic tooth extraction:

Teeth that cannot be preserved by caries>wisdom teeth>bicuspid teeth (i.e. No. 4 teeth)>premolars (No. 5 teeth)

Therefore, although you can rest assured that orthodontists will not pull teeth at will during orthodontic treatment, they usually follow the above orthodontic extraction principles.

Let's take a look~What's the difference between orthodontic extraction of 4, 5 and wisdom teeth?

The main purpose of orthodontic tooth extraction is to provide enough space for tooth movement. Generally speaking, the space provided by extraction of wisdom teeth is not as large as that provided by orthodontic teeth (4, 5).

→ Wisdom teeth are preferred for orthodontic extraction: When wisdom tooth extraction cannot provide enough space, the doctor will choose to extract No. 4 and No. 5 teeth.

→ Orthodontic extraction of No. 4 tooth: Pulling out 4 No. 4 teeth can leave 7-8 mm adduction space, so it is generally recommended that the extraction space be larger;

However, the position of No. 4 tooth is forward on one side, and it is easier for the front tooth to move backward, but it is more difficult for the big tooth to move forward, so the big tooth basically does not move, leaving all the spaces to collect the front tooth~The disadvantage is that the front tooth is easy to become "concave" and the mouth is concave due to too much internal retraction.

→ Orthodontic extraction of No. 5 tooth: For those with slight oral protrusion, it is recommended to pull out No. 5, because No. 5 is relatively backward, which can simultaneously move the front teeth backward and the big teeth forward. The collection of the front teeth inward is not so exaggerated, which can achieve the same results as No. 4.