What Happens If You Ignore a Cavity? A Don Mills Dentist Explains
A small cavity may not seem like an emergency.
You may not have any pain. You may not notice any visible changes. You may even think you can wait a few more months before seeing a dentist.
However, cavities generally do not repair themselves once a permanent tooth has developed decay.
If a cavity is ignored, the decay can continue to progress deeper into the tooth and may eventually require more extensive treatment.
If you're searching for a dentist in Don Mills, dental fillings in North York, or wondering whether you can wait to treat a cavity, this guide explains what can happen when tooth decay is left untreated.
At Teeth & Beauty Toronto, our goal is to identify dental problems early and provide personalized treatment to help preserve your natural teeth.
What Is a Cavity?
A cavity is an area of tooth decay caused by acids produced by bacteria in plaque.
These acids gradually weaken and damage the tooth's enamel.
Over time, the decay can progress through the different layers of the tooth.
A cavity may begin as a small area of decay but can become more serious if it is not treated.
Can a Cavity Go Away on Its Own?
In general, an established cavity does not go away on its own.
Very early enamel demineralization may sometimes be managed through improved oral hygiene and fluoride exposure, depending on the situation.
However, once a true cavity has formed, the damaged tooth structure usually requires professional dental treatment.
This is why regular dental exams are important. A dentist may be able to identify early decay before it becomes larger or more complicated.
What Happens If You Ignore a Cavity?
The progression of a cavity varies from person to person, but untreated decay can gradually become more extensive.
Here's what may happen over time.
1. The Cavity Can Become Larger
The first concern is that the area of decay may continue to grow.
A cavity that could initially have been treated with a relatively small filling may eventually require a larger restoration.
The more tooth structure that is lost, the more difficult it can become to restore the tooth.
2. You May Develop Tooth Sensitivity
As decay moves deeper into the tooth, you may begin experiencing sensitivity to:
Cold drinks
Hot foods
Sweet foods
Cold air
Some people experience sensitivity that disappears quickly, while others may notice more persistent discomfort.
Tooth sensitivity can have many causes, so a dental exam is necessary to determine the underlying problem.
3. The Tooth May Begin to Hurt
As decay progresses deeper into the tooth, pain may develop.
You may notice:
A dull ache
Sharp pain when eating
Pain when biting
Throbbing discomfort
Pain that comes and goes
Unfortunately, the absence of pain does not necessarily mean that a cavity is harmless.
Some cavities can become significantly larger before causing noticeable symptoms.
4. A Larger Filling May Be Necessary
If a cavity is identified early, a dental filling may be all that is required.
However, if the decay continues to spread, more of the tooth may need to be removed.
This can result in a larger restoration.
A tooth-coloured dental filling can often restore a tooth affected by decay, but the appropriate treatment depends on the size and location of the cavity.
5. The Tooth May Become Weakened
As decay removes more of the natural tooth structure, the tooth can become weaker.
This may increase the risk of:
Cracks
Fractures
Broken areas of the tooth
Difficulty chewing
In some cases, a tooth that could have been treated with a filling may eventually require a dental crown for additional protection.
6. The Decay Can Reach the Nerve
If a cavity continues progressing through the tooth, it may eventually reach the inner pulp, where the nerves and blood vessels are located.
When this happens, the tooth may become significantly painful and may require more complex treatment.
Depending on the condition of the tooth, treatment may include root canal therapy followed by a restoration such as a crown.
Treating a cavity earlier may help reduce the risk of reaching this stage.
Can an Untreated Cavity Cause an Infection?
Yes.
If decay reaches the inner portion of the tooth, bacteria can potentially cause an infection.
Signs that may indicate a more serious dental problem include:
Severe tooth pain
Facial swelling
Swelling around the gums
Sensitivity that lingers
A bad taste in the mouth
Fever
Difficulty swallowing
If you experience significant swelling, severe pain, or other concerning symptoms, you should seek prompt dental care.
Why Does a Cavity Sometimes Stop Hurting?
Some patients assume that a cavity has healed because their tooth stops hurting.
Unfortunately, this is not always the case.
If the nerve inside the tooth becomes severely damaged, the tooth may stop responding normally to stimuli.
This does not necessarily mean the problem has resolved.
In some cases, the infection or decay may continue progressing even after pain decreases.
Can a Dental Cleaning Prevent Cavities?
Professional dental cleanings help remove plaque and tartar, which are major contributors to tooth decay.
However, a dental cleaning cannot repair an existing cavity.
Regular cleanings combined with dental exams allow your dental team to:
Remove plaque and tartar
Identify areas of concern
Monitor your oral health
Detect possible decay
Recommend treatment when necessary
Preventative care is one of the best ways to identify problems before they become more complicated.
How Can You Prevent Cavities?
The best way to reduce your risk of cavities is to maintain consistent oral hygiene and preventative dental care.
Helpful habits include:
Brush your teeth twice daily
Floss every day
Use fluoride toothpaste
Limit frequent sugary snacks and drinks
Drink water regularly
Attend regular dental exams
Schedule professional dental cleanings
Your dentist may recommend a customized preventative care schedule based on your individual oral health.
When Should You See a Don Mills Dentist About a Possible Cavity?
You should schedule a dental appointment if you notice:
Tooth sensitivity
A visible hole in a tooth
A dark spot or discolouration
Pain when biting
Food consistently getting stuck in one area
Tooth pain
A chipped or broken tooth
Even if you do not have symptoms, regular dental exams are important because cavities can sometimes develop without noticeable pain.
Why Early Treatment Is Usually Better
Treating a cavity early may allow your dentist to preserve more of your natural tooth structure.
Early treatment may help prevent the need for more extensive procedures, such as:
Larger restorations
Root canal treatment
Tooth extraction
The earlier a dental problem is identified, the more treatment options may be available.
Choosing a Dentist in Don Mills for Cavity Treatment
If you are concerned about a cavity or have been delaying dental treatment, the best first step is a comprehensive dental exam.
At Teeth & Beauty Toronto, we evaluate your teeth carefully and explain your treatment options before proceeding.
Whether you need a dental filling, preventative care, or further treatment, our goal is to help preserve your natural teeth and support your long-term oral health.
We welcome patients from Don Mills, North York, and surrounding areas of Toronto.
Book Your Dental Exam in Don Mills
If you think you may have a cavity, waiting may allow the problem to become more extensive.
A simple dental exam can help determine whether treatment is needed and what options may be available.
At Teeth & Beauty Toronto, we provide comprehensive dental exams and restorative dental care for patients in Don Mills and North York.
Book your appointment today and take the first step toward protecting your smile.