Common Dental Concerns: Root Canals, Flossing, and Anesthesia Effects

Dental issues

Hello, Doctor:
1.
I would like to ask, if a previously treated tooth has fractured and was not restored, and the dentist mentioned that the medication has dissolved and that a root canal retreatment is necessary, does this mean that only the filling will be redone?
2.
Is using dental floss intended to prevent the buildup of dental plaque? Will it cause the spaces between my teeth to become larger?
3.
When receiving anesthesia, is it normal for not only the lips to feel numb but also for the nose to feel slightly numb? Thank you!

Lai, 10~19 year old female. Ask Date: 2010/07/15

Dr. Huang Zhicheng reply Dentistry

1.
If a tooth that has undergone root canal treatment is not properly sealed, there is a possibility of bacterial invasion, necessitating a retreatment of the root canal followed by a restoration of the tooth, rather than simply filling the original cavity.
2.
Dental floss is used to clean the interproximal surfaces of teeth where plaque accumulates, as toothbrushes cannot reach these areas.
Dental floss is thin, and the periodontal ligament supports the tooth roots, allowing for the insertion of floss without increasing the size of the interdental spaces.
3.
Administering anesthesia may cause temporary nasal numbness, which is normal and typically resolves in about half an hour.

Respectfully, Dr.
Huang Chih-Cheng, Attending Physician, Taoyuan Hospital, Department of Health, Executive Yuan.

Reply Date: 2010/07/15

More Info

When it comes to common dental concerns such as root canals, flossing, and anesthesia effects, it's important to understand the underlying issues and best practices for maintaining oral health. Let's address each of your questions in detail.

1. Re-doing Root Canal Treatment: If a tooth that has previously undergone root canal treatment becomes fractured and is not properly restored, it can lead to complications. The dentist's statement that "the medication has soaked" likely refers to the filling material used in the root canal becoming compromised due to moisture or bacteria entering the tooth. In this case, redoing the root canal treatment is necessary. This process involves cleaning out the existing filling material, disinfecting the canal, and then refilling it with new material. It's not merely about filling the cavity; it requires a thorough cleaning and sealing of the root canal system to prevent reinfection. After the root canal is successfully redone, the tooth will typically need to be restored with a crown or filling to protect it from further damage.

2. Flossing and Plaque Control: Flossing is an essential part of oral hygiene that helps remove plaque and food particles from between the teeth, where a toothbrush may not reach effectively. Regular flossing can significantly reduce the risk of cavities and gum disease. As for your concern about flossing causing gaps between teeth, it is unlikely that proper flossing will lead to larger spaces. In fact, if done correctly, flossing can help maintain the health of the gums and prevent the recession that might lead to larger gaps. However, aggressive or improper flossing techniques can potentially cause gum irritation or damage, so it's important to use gentle motions.

3. Anesthesia Effects: Experiencing numbness in the lips and nose after receiving dental anesthesia is generally considered normal. Local anesthetics are designed to block nerve signals in the area where they are applied, which can lead to a temporary loss of sensation not only in the targeted area but also in nearby regions. This is particularly common with injections in the lower jaw, where the anesthetic can affect the nerves that supply sensation to the lips, chin, and sometimes even the nose. Typically, this numbness should subside within a few hours as the anesthetic wears off. If you experience prolonged numbness or any unusual symptoms, it is advisable to consult your dentist.

In summary, maintaining good dental health involves understanding the procedures and practices that affect your teeth and gums. If you have had a root canal, it is crucial to ensure that it is properly restored to avoid complications. Regular flossing is vital for preventing plaque buildup and maintaining gum health, and experiencing numbness after anesthesia is usually a normal reaction. Always communicate with your dentist about any concerns or symptoms you experience, as they can provide personalized advice and treatment options tailored to your specific needs.

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