Root canal therapy has a reputation that can make patients nervous, but the purpose of the treatment is actually simple: to relieve pain, remove infection, and save your natural tooth whenever possible. If you have a deep cavity, a cracked tooth, or a dental infection, a root canal may be the best way to restore comfort and protect your long-term oral health.
At St. Andrew’s Dental Centre in Aurora, Dr. Angela Morales provides gentle, patient-focused root canal therapy with clear explanations at every step. If you have been told you may need a root canal, this guide explains what happens before, during, and after treatment so you can feel prepared and confident.
What Is Root Canal Therapy?
Inside every tooth is soft tissue called pulp. This pulp contains nerves, blood vessels, and connective tissue. When the pulp becomes inflamed or infected, it can cause significant pain and may lead to swelling or an abscess.
A root canal removes the infected or damaged pulp, cleans and disinfects the inside of the tooth, and seals the canals to prevent bacteria from returning. Afterward, the tooth is restored with a filling or, in many cases, a crown.
The goal is to keep your natural tooth in place rather than removing it.
Why Might You Need a Root Canal?
A root canal may be recommended when damage reaches the inner nerve space of the tooth. Common causes include:
- Deep tooth decay
- A cracked or broken tooth
- Repeated dental treatment on the same tooth
- Trauma or injury to the tooth
- Infection under an old filling or crown
- A dental abscess
Sometimes root canal symptoms appear suddenly. Other times, the infection develops quietly. That is why regular cleanings and checkups are so important. They allow your dentist to detect problems before they become emergencies.
Signs You May Need Root Canal Treatment
You should book a dental exam if you notice:
- Severe toothache
- Lingering sensitivity to hot or cold
- Pain when biting or chewing
- Swelling near the gums or face
- A pimple-like bump on the gum
- Darkening of a tooth
- Bad taste or drainage near one tooth
If you have severe pain, swelling, or a broken tooth, visit the dental emergencies page or call the office as soon as possible. Dental infections should not be ignored because they can spread and become more serious.
What Happens Before a Root Canal?
Before treatment begins, Dr. Morales will examine your tooth and review your symptoms. Digital X-rays may be taken to see the roots, bone, and extent of infection. The team may also test how your tooth responds to temperature or pressure.
This appointment helps determine whether a root canal is needed or whether another treatment, such as a filling, crown, or extraction, is more appropriate.
At St. Andrew’s Dental Centre, we take time to explain:
- What is happening inside the tooth
- Why root canal treatment is recommended
- What the treatment involves
- Whether the tooth may need a crown afterward
- What costs and insurance coverage may look like
If you feel anxious, let the team know. Options such as nitrous oxide sedation may help make your visit feel calmer and more manageable.
Will a Root Canal Hurt?
Most patients are surprised to learn that root canal therapy is often similar to getting a filling. The tooth and surrounding area are numbed with local anesthetic before treatment begins.
At St. Andrew’s Dental Centre, we also offer The Wand, a computer-controlled local anesthesia system that can make dental freezing more comfortable and predictable. This can be especially helpful for patients who feel nervous about injections or dental treatment.
The goal is to keep you comfortable throughout the procedure. In many cases, root canal therapy relieves the pain caused by infection.
What Happens During Root Canal Therapy?
The procedure usually follows several steps.
1. The Tooth Is Numbed
Local anesthetic is used to freeze the area. Your dentist will confirm that you are comfortable before beginning.
2. The Tooth Is Opened
A small opening is made in the top of the tooth to access the infected or inflamed pulp.
3. The Canals Are Cleaned
Special dental instruments are used to remove the damaged pulp from inside the root canals. The canals are carefully shaped and disinfected to reduce bacteria.
4. The Tooth Is Sealed
Once the canals are cleaned, they are filled and sealed with a dental material designed to prevent reinfection.
5. The Tooth Is Restored
A temporary or permanent filling may be placed after treatment. In many cases, especially for molars and premolars, a crown is recommended to protect the tooth from cracking.
If your tooth needs extra protection, Dr. Morales may recommend same-day dental crowns when appropriate. A crown acts like a protective cover, restoring strength, function, and appearance.
Why a Crown May Be Needed After a Root Canal
Root canal treated teeth can become more fragile, especially if they were already weakened by decay, cracks, or large fillings. Back teeth take heavy chewing pressure, so they often need a crown after root canal therapy.
A crown can help:
- Protect the tooth from fracture
- Restore chewing function
- Improve the shape and appearance of the tooth
- Seal and strengthen the remaining structure
Not every root canal tooth needs a crown. Front teeth with strong remaining structure may sometimes be restored with a filling. Your dentist will recommend the best option based on tooth location, bite forces, and how much natural tooth remains.
What Happens After a Root Canal?
It is normal to feel mild tenderness for a few days after treatment, especially when biting. This usually improves with time and can often be managed with over-the-counter pain relief, if appropriate for you.
After treatment, follow your dentist’s instructions carefully. Avoid chewing hard foods on the treated tooth until it has been fully restored. If a temporary filling is placed, do not delay the final restoration. A root canal removes infection, but the tooth still needs proper protection afterward.
You should call the office if you experience:
- Increasing pain after several days
- Swelling
- A temporary filling that feels loose
- A crown or filling that comes out
- Pain when biting that does not improve
Follow-up care is part of making root canal therapy successful.
How Long Does a Root Canal Last?
With proper restoration and good oral hygiene, a root canal treated tooth can last many years. Many patients keep these teeth for decades.
To protect your tooth:
- Brush twice daily with fluoride toothpaste
- Floss every day
- Keep routine cleanings and checkups
- Wear a night guard if you grind your teeth
- Avoid chewing ice or hard objects
- Complete the recommended crown or final restoration
The healthier your gums and bite are, the better your long-term result will be.
Can a Root Canal Prevent Tooth Extraction?
Yes. Root canal therapy is often recommended to save a tooth that would otherwise need to be removed. Keeping your natural tooth helps preserve chewing ability, spacing, and jaw function.
If a tooth is too damaged to save, an extraction may be necessary. In that case, replacement options such as bridges, dentures, or implants may be discussed. However, when possible, saving the natural tooth is often the preferred choice.
FAQs About Root Canal Therapy
1. How do I know if I need a root canal?
You may need a root canal if you have severe tooth pain, lingering hot or cold sensitivity, swelling, pain when biting, or a gum bump near the tooth. An exam and X-ray are needed to confirm.
2. Is root canal therapy painful?
Root canal therapy is performed with local anesthetic, so the area should be numb during treatment. Many patients find it similar to having a filling.
3. Do I always need a crown after a root canal?
Not always. Molars and premolars often need crowns because they handle heavy chewing forces. Some front teeth may only need a filling if enough healthy structure remains.
4. How long does root canal treatment take?
Many root canals can be completed in one or two visits, depending on the tooth, the number of canals, and the severity of infection.
5. What happens if I delay a root canal?
Delaying treatment can allow infection to spread, increase pain, and make the tooth harder or impossible to save. Early care gives you the best chance of keeping your natural tooth.
Book Root Canal Therapy in Aurora
If you have tooth pain, swelling, or lingering sensitivity, do not wait for the problem to get worse. St. Andrew’s Dental Centre in Aurora offers gentle root canal therapy, comfortable dental freezing with The Wand, and restorative options like same-day dental crowns to help protect your tooth after treatment.
Call St. Andrew’s Dental Centre at 905-727-4243 or visit our Contact Us page to book your appointment today. Let our team help you relieve pain, protect your tooth, and restore your smile with comfortable care.