Mandibular Development Issues After Orthodontic Treatment

Mandibular development issues?

Hello Doctor, my height is 183 cm and my weight is 63 kg.
It has been over a year since I completed my orthodontic treatment, and my bite is normal.
My wisdom teeth have not erupted yet.
(I experienced a noticeable growth spurt from the third year of junior high to the second year of high school, which was late development!)
1.
When the mandible is growing, do the entire teeth (dental arch) move forward as well?
2.
Now that I see my upper and lower incisors have a normal bite, does this mean my body will not require further growth of the jaw?
3.
When the jaw grows, does it only grow at the very front bottom part? I feel that from the side, my jaw looks short and lacks curvature.

Could you please help me with these questions? Thank you!

Liu Xiansheng, 10~19 year old female. Ask Date: 2016/09/22

Dr. Zeng Guanghui reply Dentistry

1.
Yes.
2.
The normal occlusion of the upper and lower incisors is not directly related to the forward growth of the jaw; the growth of the jaw is primarily associated with the growth curve.
3.
When the jaw grows, it grows as a whole.
If viewed from the side, a short jaw without curvature may be due to the angle of jaw growth; it is advisable to consult an orthodontist for further evaluation.

Reply Date: 2016/09/22

More Info

Understanding mandibular development after orthodontic treatment is a multifaceted topic that encompasses growth patterns, skeletal changes, and the implications of orthodontic interventions. As you have completed your orthodontic treatment and are observing changes in your jaw and teeth, it’s important to address your questions with a comprehensive understanding of mandibular growth and development.

1. Does the entire dental arch move forward with mandibular growth?
Yes, during growth, the mandible (lower jaw) does grow and develop in a way that can affect the position of the teeth. The growth of the mandible typically occurs in a downward and forward direction. As the mandible grows, the dental arch can also shift, which may lead to changes in the occlusion (bite). However, the degree to which the teeth move with the mandible can vary based on several factors, including the timing of orthodontic treatment, the specific mechanics used during treatment, and individual growth patterns.
2. If the occlusion is normal, does that mean the body will stop further mandibular growth?
Not necessarily. While a normal occlusion is a positive outcome of orthodontic treatment, it does not directly dictate the growth of the mandible. The body’s growth patterns are influenced by genetic and environmental factors, and growth can continue even after orthodontic treatment is completed. The mandible can continue to grow and change shape into the late teens and early twenties, especially in individuals who experience late growth spurts. Therefore, even if your bite appears normal now, there may still be potential for further growth and development of the mandible.

3. Does the mandible grow only at the anterior (front) portion?
The growth of the mandible is not limited to just the anterior portion. The mandible grows as a whole, but the changes may be more pronounced in certain areas. The anterior region may appear to grow more due to the forward positioning of the chin, while the posterior (back) part of the mandible also undergoes growth. If you perceive your chin as short or lacking curvature, this could be due to the overall shape of your mandible and how it relates to your facial profile.
In summary, the growth of the mandible is a complex process influenced by various factors, including genetics, age, and previous orthodontic treatment. It is essential to monitor your growth and development, especially since you mentioned experiencing late growth spurts. If you have concerns about the appearance of your jaw or any functional issues, consulting with an orthodontist or oral surgeon may provide you with tailored advice and potential treatment options. They can assess your specific situation and determine if any further intervention is necessary to achieve your desired aesthetic and functional outcomes.
Additionally, it’s worth noting that if you are still in your late teens or early twenties, your body may still be undergoing changes, and it’s possible that your jawline and facial structure will continue to evolve. Regular check-ups with your orthodontist can help ensure that any changes in your jaw development are monitored and addressed appropriately.

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