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5-9-2 Nishi Gotanda, Aspen City #304, Shinagawa Ward, Tokyo 03-3779-6503
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Blin-Ayusawa Orthodontic Clinic > About Treatment With and Without Extracting Teeth

About Treatment With and Without Extracting Teeth

At first when orthodontic specialists started considering if it is possible to align teeth beautifully without extracting teeth. Thinking of treatment policy for each patient was then considered.
Possibilities for treatment with or without extracting teeth as criteria are explained as follows.

  1. If the sizes of jawbones and teeth match properly.
  2. If there is any mismatch between the size of upper jaw and lower jaw. If any, how much is the difference?
  3. How is the anteroposterior positional relation between upper and lower jaws?
  4. If the patient can have a good face after treatment (especially side face)
  5. If the teeth can match up with the motion of joints?
  6. If the teeth can match up with the size of tongue?
  7. If the patient is in the period of actively growth and development?
  8. Others

Upon consideration for the above, we determine which to conduct, balancing the advantages and disadvantages of treatment with or without extracting teeth.

Let me explain a little more, simply,

  1. If the patient has small jawbones and large teeth, he/she would have uneven teeth.
    In general, there is a limit on how to enlarge the jawbones of adults. Therefore, the size of teeth alignment should be adjusted by reducing the number of teeth to suit the size of the jaw.

    *In the case of treatment without extracting teeth, we need to arrange the teeth with inclining outward of the size of jaw, the gum may be lowered in the future, and it may damage stability after treatment.
    before after
    Extracting teeth can match up the size of jawbones and teeth alignment.

  2. If the patient has large jawbones and small teeth, he/she would have gaps between the teeth.
    Basically, the size of the jawbones and teeth are related to heredity through parents as well as the size and position of the tongue.

    *In the case of treatment without extracting teeth and make the teeth alignment smaller, the tongue would feel tight and may try to make the teeth alignment back to the original size, it may cause a gap between the teeth.
    before after
    Treatment can be done without extracting teeth.

  3. If the patient has the jawbones matched with the size of teeth, even looks somewhat uneven, the treatment can be done without extracting teeth.
    before after
    Treatment by enlarging without extracting teeth.

About half of our childhood patients are Westerners, the Caucasoid's skeletal features have depth in the jawbones and they have relatively small teeth. Therefore, they have less uneven teeth compared to Japanese, therefore the treatment for 70 to 80% of patients can be done without extracting teeth if there is a mismatch of anteroposterior positional relations between the upper and lower jaws are improved at an early stage.

Caucasoid: Non-extracting teeth treatment by growth induction to the frontward of the lower jaw. (Twin block device)

Now, what type of skeletal features do we, Mongoloids, have?

That is; no depth of jawbones but the teeth are larger. Therefore, many have projected mouths rather than noses when looking from the side of the face. As a fact, there are more possibilities of treatment to align teeth according to the size of jawbones by extracting teeth, compared to Caucasoid.

Possibilities of treatment with extracting teeth
Caucasoid < Japanese (Determined by the size of bones and teeth, and height of nose, etc.)
japanese caucasoid
Comparison of teeth size, depth of jawbones,
width and shape of teeth alignment along
with it between Japanese and Caucasoid
(identical enlargement percentage)

Blin-Ayusawa Orthodontic Clinic > About Treatment With and Without Extracting Teeth


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