September 21, 2026
A toothache that never seems to stop and always hurts can get in the way of your day-to-day activities, make eating unpleasant and indicate a serious dental problem behind the discomfort. When the bacteria get deep into the inner layers of a tooth, the only method to relieve the discomfort was extraction. Today’s advanced root canal therapy can remove the infection and save your original tooth.
At King Street Dental Center in Waterloo, Ontario, our caring dental staff provides accurate and painless root canal procedures to ease your pain and restore lasting oral health to your smile.

The inner layer of your tooth comprises nerve tissue, blood vessels and connective tissue (the dental pulp). Signs of trouble include: If significant decay, cracks or repetitive dental work has caused this area to become inflamed or infected, you might encounter these tell-tale warning signs:
- Severe, Persistent Toothache: Sharp or dull discomfort during eating, pressing or resting.
- Extreme Temperature Sensitivity: Sensitivity to hot meals or cold drinks that lasts for a long time.
- Swelling or Tender Gums Swelling: Inflammation or a persistent pimple-like protrusion (abscess) on the gums around the affected area.
- Tooth Discoloration:The nerve tissue inside the tooth root may break down causing the tooth to look darker or grayish.
The Root Canal Process: Step by Step
A root canal is a simple and common procedure that removes the infection and preserves the original tooth structure.
Phase 1. Diagnosis & Pain Relief
Digital x-rays are used to analyze the form of the surrounding bone and the canal. Anesthesia: The area is totally numbed with a local anesthetic so the surgery can be done without pain.
Phase 2. Removal of the infected pulp
A hole is drilled into the top of the tooth to reach the pulp chamber. Specialized devices are employed to painstakingly remove affected nerve tissue and germs.
Phase 3: Disinfecting & Shaping Canals
The interior root canals are carefully cleansed, flushed and shaped to make room for the permanent sealing material.
Phase 4: Sealing & Restoring
The canals are packed with a biocompatible material (gutta-percha) and sealed. Then a custom dental crown is fitted on the tooth so it can once again have its original strength and function.
The importance of saving your natural tooth
The advantages of root canal therapy compared to tooth extraction in tooth preservation are clear:
- Helps Keep Teeth Aligned: Keeping your natural tooth helps prevent surrounding teeth from drifting out of alignment.
- Keeps Chewing Efficiency:Restored teeth work normally with your natural teeth, so you can bite and chew normally.
- Preserves Jawbone Structure:The natural tooth root is able to offer the needed stimulation to the surrounding jawbone, avoiding regional bone loss.
Conclusion: Restore Comfort to Your Smile
Don’t let a toothache go untreated. Modern root canal therapy is safe, comfortable, and highly effective at eliminating pain while keeping your natural smile intact.
Experiencing tooth pain or swelling? Contact our Kitchener clinic or schedule a consultation online today. Visit the official King Street Dental Centre Root Canal Page to book your appointment and take the first step toward pain-free oral health!
