Wider Gaps Between Teeth: Causes and Concerns - Dentistry

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Widening of the interdental spaces?


Hello Doctor, I recently noticed that the gap between my upper right third molar and the adjacent tooth seems to have increased while using dental floss (the gum between the two teeth also appears to be higher, but I'm not sure).
However, during my last check-up six months ago, the doctor said everything was fine and the X-rays were normal.
I would like to ask if this could be a sign of periodontal disease, or if there are other conditions that could cause the gap to widen? If it was confirmed six months ago that there was no periodontal disease, is it possible to develop it and experience gum recession within that time frame? Thank you, Doctor.

Wei, 20~29 year old female. Ask Date: 2021/08/11

Dr. Lin Jiayong reply Dentistry


Hello: As we age, it is indeed common to experience alveolar bone loss, gum recession, and widening of the spaces between teeth.
However, if there are systemic diseases (such as diabetes or autoimmune diseases), there is a possibility of localized juvenile periodontitis in the area of the upper and lower first molars.
It is recommended that you continue to monitor the situation and return for follow-up visits, so that active treatment can be initiated if the condition worsens.
Sincerely, Lin Chia-Yung, Department of Dentistry, Taichung Hospital, Ministry of Health and Welfare.

Reply Date: 2021/08/11

More Info


When it comes to the widening gaps between teeth, there are several factors to consider, and it's important to understand both the potential causes and the implications for your oral health. Based on your description, it seems that you have noticed an increase in the size of the gap between your upper right third tooth and its adjacent tooth, along with a possible change in the height of the gum tissue. You also mentioned that a dental examination six months ago, including X-rays, showed no signs of periodontal disease.

Firstly, it’s essential to recognize that changes in the spacing between teeth can occur for various reasons. One common cause is the natural movement of teeth over time. Teeth can shift due to factors such as changes in bite, loss of supporting bone, or even the natural aging process. This shifting can lead to wider gaps, especially if there has been any loss of bone density or gum recession.

Gum recession, which you hinted at with the observation of potentially higher gum tissue, can indeed lead to wider gaps between teeth. Gum recession occurs when the gum tissue pulls back from the teeth, exposing more of the tooth's surface and sometimes even the roots. This can be caused by several factors, including aggressive brushing, periodontal disease, hormonal changes, or even genetic predisposition. If your gums are receding, it could create the appearance of larger gaps between your teeth.

Regarding your concern about periodontal disease, it is possible for periodontal issues to develop relatively quickly, especially if there are risk factors involved, such as poor oral hygiene, smoking, or certain medical conditions. However, if your dentist confirmed that there were no signs of periodontal disease six months ago, it is less likely that you would develop significant gum recession or periodontal disease in such a short time frame without other contributing factors.

Another possibility for the widening gaps could be related to the alignment of your teeth. If your bite has changed or if there is any misalignment, it could cause teeth to shift, leading to gaps. Additionally, habits such as teeth grinding (bruxism) can also contribute to changes in tooth position and spacing.

To address your concerns, it is advisable to schedule a follow-up appointment with your dentist. They can perform a thorough examination, including checking for any signs of gum disease, assessing the health of your gums, and possibly taking new X-rays to evaluate any changes since your last visit. If there is evidence of gum recession or other issues, your dentist can recommend appropriate treatments, which may include improved oral hygiene practices, professional cleanings, or even surgical options if necessary.

In summary, while it is possible for gaps between teeth to widen due to various factors, including natural movement, gum recession, or changes in bite, it is crucial to have a professional evaluation to determine the underlying cause. Regular dental check-ups and maintaining good oral hygiene are essential to prevent potential issues and ensure your dental health remains optimal. If you have any further concerns or notice additional changes, do not hesitate to reach out to your dental care provider for guidance.

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