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Now Accepting New Patients and Canada Dental Care Plan
(519) 894-9444
Let’s Talk

Root Canal Therapy in Kitchener, ON – Because Your Tooth Deserves a Second Chance!

Relieve Pain & Restore Your Tooth with Expert Care

Root Canal Therapy

Root Canal Therapy in Kitchener

A root canal is a treatment used to save a tooth when the soft tissue inside it—the dental pulp—has become irreversibly inflamed, infected or damaged.

At MI Dental in Kitchener, we perform root canal therapy when examination and diagnostic testing indicate that the tooth can be predictably treated and restored. The goal is to remove the inflamed or infected tissue from inside the tooth, clean and seal the root canal system, and preserve the natural tooth whenever doing so is clinically appropriate.

A tooth that needs root canal treatment does not always cause severe pain. Some become intensely painful; others are discovered because of a deep cavity, a crack, an abscess or changes visible on an X-ray.

The first step is therefore not simply deciding to “do a root canal.” It is determining what is happening inside the tooth and whether root canal therapy is actually the right treatment.

What Is Root Canal Therapy?

Inside every tooth is a space containing the dental pulp, which includes nerves, blood vessels and connective tissue.

During development, the pulp plays an important role in forming the tooth. Once the tooth is fully developed, however, it can continue to function after the pulp has been removed because the tissues surrounding the root continue to support it.

Root canal therapy—also called endodontic treatment—involves:

The objective is to treat disease inside the tooth while keeping the tooth itself.

This basic sequence is consistent with current endodontic treatment principles described by the American Association of Endodontists.

How Do You Know If You Need a Root Canal?

There is no single symptom that proves a tooth needs root canal therapy.

Some common reasons for evaluating a tooth include:

Lingering Sensitivity to Hot or Cold

Brief sensitivity does not automatically mean a root canal is required.

What concerns us more is pain that continues after the hot or cold stimulus has been removed, particularly when the response is intense or prolonged.

Spontaneous Toothache

A tooth that begins hurting without being stimulated—especially pain that throbs, wakes you at night or becomes difficult to localize—may have significant pulpal inflammation.

Pain When Biting or Chewing

Tenderness when biting can occur for several reasons, including inflammation around the root, a crack, trauma or problems with the bite.

It requires diagnosis rather than automatically assuming the tooth needs root canal treatment.

Swelling or a Dental Abscess

Swelling of the gum, face or tissues around a tooth may indicate infection originating from the pulp or root.

A small pimple-like opening on the gum can sometimes represent a draining sinus tract associated with a chronic infection.

A Deep Cavity

Decay that progresses close to or into the pulp can cause irreversible inflammation or infection.

Importantly, the absence of pain does not guarantee that the pulp is healthy.

A Cracked or Traumatized Tooth

A crack, fracture or previous injury can damage the pulp even when a large cavity is not present.

Trauma can sometimes affect the pulp months or even years after the original injury.

Not Every Toothache Needs a Root Canal

This distinction is important.

Sensitivity or dental pain can also be caused by:

Likewise, a tooth with an inflamed pulp does not always require immediate root canal therapy. Some pulpal inflammation may be reversible once the underlying cause is treated.

This is why diagnosis matters.

At MI Dental, we consider the history of the symptoms, clinical examination, X-rays and pulp/periapical testing before recommending endodontic treatment.

How We Diagnose a Tooth Before Root Canal Treatment

The diagnosis begins with understanding what the tooth has been doing.

We may ask:

Clinical testing may then include:

Cold or Other Pulp Testing

Comparing the tooth’s response with neighbouring teeth can provide information about the condition of the pulp.

Percussion and Palpation

Gentle testing around the tooth can help determine whether inflammation has extended into the tissues surrounding the root.

Bite Testing

This can be particularly useful when a crack is suspected.

Dental X-rays

Radiographs help us evaluate the depth of decay, previous restorations, root anatomy and changes in the bone around the root.

No single test tells the entire story. The findings are interpreted together before a diagnosis is made.

What Happens During Root Canal Therapy?

Although root canal treatment occurs inside the tooth, the process is quite methodical.

1. The Tooth Is Anesthetized

Local anesthetic is used before treatment begins.

Our goal is to make sure the tooth and surrounding tissues are adequately numb before proceeding.

If a severely inflamed tooth is difficult to anesthetize, additional anesthetic techniques may be required. We do not assume that a patient should simply tolerate discomfort because “the tooth has already been frozen.”

2. The Tooth Is Isolated

A rubber dam is placed around the tooth during root canal treatment.

This isolation keeps saliva and oral bacteria away from the treatment area, prevents irrigating solutions or small instruments from entering the mouth and allows us to work in a controlled environment.

3. An Opening Is Made Into the Tooth

A small access opening is created through the biting surface or back of the tooth so that the pulp chamber and root canals can be reached.

The amount of tooth structure already lost to decay, previous restorations or fractures is considered during treatment.

4. The Root Canals Are Located and Cleaned

Very small endodontic instruments are used to identify, clean and shape the root canals.

The length of each canal needs to be carefully established so treatment reaches the appropriate position within the root without unnecessarily extending beyond it.

The canals are cleaned mechanically and with disinfecting irrigating solutions to reduce tissue remnants and microorganisms within the root canal system.

5. The Canals Are Filled and Sealed

Once appropriately cleaned and shaped, the canals are filled with a biocompatible root-filling material, commonly gutta-percha, together with a sealer.

The objective is to seal the prepared canal space and reduce the opportunity for microorganisms to recolonize it.

This cleaning, shaping, disinfection and sealing sequence is the foundation of conventional root canal therapy.

Does Root Canal Treatment Hurt?

Root canals have an unfortunate reputation.

The important distinction is that the pain associated with a badly inflamed or infected tooth is not the same thing as the treatment used to manage it.

With effective local anesthesia, most patients can be kept comfortable during root canal therapy. The American Association of Endodontists similarly notes that modern anesthetic techniques allow most patients to remain comfortable during treatment.

That does not mean we should promise:

“A root canal never hurts.”

Teeth with severe inflammation can sometimes be more challenging to anesthetize. If you feel something that suggests anesthesia is inadequate, we want you to tell us so we can stop and reassess.

Dental Anxiety and Root Canal Treatment

Some patients become anxious simply because they have heard stories about root canals.

If dental anxiety makes treatment difficult, tell us before we begin.

Simple measures such as explaining the procedure, establishing a stop signal and taking breaks can make a significant difference. For selected patients, nitrous oxide sedation may also be considered when appropriate.

The objective is not to rush through the appointment. It is to complete treatment safely while keeping the experience manageable.

Does a Root Canal Take One Appointment or Several?

It depends on the tooth.

Some root canal treatments can be completed in one appointment, while others are better managed over two or more visits.

Factors that can influence this include:

If treatment is completed over multiple appointments, a temporary restoration is generally placed between visits.

One appointment is not inherently “better” than two. The treatment sequence should be determined by the clinical situation.

What Happens After the Root Canal?

Finishing the root canal system is only part of saving the tooth.

The tooth also needs an appropriate final restoration.

Depending on how much tooth structure remains and where the tooth is located, this may involve:

Posterior teeth such as molars and premolars often require substantial protection because they are exposed to significant chewing forces and frequently already have considerable structural loss.

The need for a crown is therefore not simply because:

“Root canal treatment makes a tooth brittle.”

The larger issue is the combined loss of tooth structure from decay, previous restorations, cracks and the access required for treatment.

The final restoration is an important part of protecting the remaining tooth and maintaining a good seal against reinfection. The AAE similarly emphasizes restoring a root-canal-treated tooth with an appropriate crown or other restoration after endodontic treatment.

What Should I Expect After a Root Canal?

The tooth and surrounding tissues may feel tender for several days after treatment, particularly if there was significant inflammation or infection beforehand.

You may notice:

This should generally improve rather than progressively worsen.

Follow the postoperative instructions you are given and avoid chewing heavily on a tooth with a temporary restoration unless advised otherwise.

Contact the office if you experience symptoms such as:

Can a Root Canal Save the Tooth Permanently?

Root canal therapy can allow a tooth to function for many years, and some root-canal-treated teeth remain functional for the rest of a person’s life.

But no dentist can promise that every treated tooth will last forever.

Long-term prognosis depends on several factors, including:

A root canal treats disease within the root canal system. It does not make the tooth immune to future dental problems.

Can a Root Canal Fail?

Yes.

Even well-treated teeth can occasionally develop persistent or recurrent disease.

Possible reasons include:

Depending on the circumstances, options may include root canal retreatment, endodontic surgery or extraction.

The AAE similarly identifies new decay, compromised restorations and fractures among reasons a previously treated tooth can develop new problems.

Root Canal Treatment or Extraction?

If a tooth is restorable and has a reasonable prognosis, root canal therapy may allow us to preserve it.

But not every tooth should be saved at all costs.

Extraction may be more appropriate when, for example:

The decision is not simply:

“Root canal good, extraction bad.”

We need to ask:

Can this particular tooth be predictably treated, restored and maintained?

If the answer is no, removing the tooth may be the more appropriate treatment.

When Might You Need an Endodontist?

An endodontist is a dentist who has completed additional specialty training focused on diagnosing and treating diseases of the dental pulp and tissues surrounding the roots.

Many root canal treatments can be performed by general dentists.

Other cases may be referred to an endodontist because of factors such as:

At MI Dental, we assess the individual tooth and determine whether treatment is appropriate to complete in our office or whether referral would provide a more predictable option.

That decision is based on the complexity of the case—not on trying to keep every procedure in-house.

Why Save a Natural Tooth?

When a tooth can be predictably treated and restored, preserving it has obvious advantages.

Your natural tooth already has:

Saving the tooth can also avoid the need to replace the space with an implant, bridge or removable prosthesis.

But preservation only makes sense when the tooth has a reasonable long-term restorative and periodontal prognosis.

The objective is not simply “save every tooth.”

It is:

Save the right tooth when doing so provides a sound long-term option.

Root Canal Therapy at MI Dental in Kitchener

If you have persistent tooth pain, swelling, lingering temperature sensitivity or have been told that you may need a root canal, the first step is an examination and diagnosis.

At MI Dental in Kitchener, we evaluate the pulp, root, surrounding tissues and restorability of the tooth before recommending treatment.

When root canal therapy is appropriate, our goal is to:

A painful tooth does not automatically need to be removed—and it does not automatically need a root canal either.

The diagnosis comes first.

Contact MI Dental to arrange an assessment if you are experiencing symptoms or have been advised that a tooth may require root canal treatment.

Frequently Asked Questions

What is the difference between a root canal and root canal therapy?

In everyday conversation, people use “root canal” to describe the procedure. Technically, the root canal is the space inside the root of the tooth, while root canal therapy or endodontic treatment is the procedure performed within that space.

How do I know whether I need a root canal?

Symptoms such as lingering hot or cold sensitivity, spontaneous toothache, pain when biting, swelling or an abscess can indicate pulpal or root-related disease. However, these symptoms can have other causes. Diagnosis requires examination, appropriate testing and usually dental X-rays.

Can I need a root canal even if the tooth does not hurt?

Yes. A pulp can lose vitality or become chronically infected without causing severe pain. Some problems are identified through examination, X-rays, swelling or changes around the root rather than toothache alone.

Is root canal therapy painful?

Local anesthetic is used to keep the tooth comfortable during treatment. Severely inflamed teeth can occasionally be more difficult to anesthetize and may require additional techniques. If anesthesia appears inadequate, treatment should be paused and reassessed rather than asking the patient to tolerate pain.

How many appointments does a root canal require?

Some cases can be completed in one appointment, while others require two or more. The number of visits depends on the tooth’s anatomy, infection, complexity and clinical circumstances.

Will I need a crown after a root canal?

Not every root-canal-treated tooth requires the same restoration. The decision depends on the location of the tooth, the amount of remaining healthy structure, existing restorations, cracks and chewing forces. Molars and premolars frequently require greater structural protection.

Does removing the nerve make the tooth dead?

The pulp inside the tooth is removed during root canal treatment, so the tooth no longer has vital pulp tissue. However, the tooth remains supported by living tissues surrounding its root and can continue to function in the mouth.

Can a root canal tooth become infected again?

Yes. Recurrent disease can occur if bacteria re-enter the tooth, if complex anatomy was not fully treated, or if the tooth or restoration later develops decay, leakage or fracture. Retreatment, specialist care or extraction may sometimes be necessary.

Is an endodontist the same as a dentist who performs root canals?

No. General dentists can perform root canal therapy, while an endodontist is a dentist who has completed additional specialty education in endodontics. Complex cases may be referred to an endodontist when appropriate.