Root canal treatment step by step: How long does it take, what does it look like and what to expect?

A dental visit at which the diagnosis is "root canal treatment needed" still causes anxiety in many patients. The myth of a painful and complicated procedure discourages people from undergoing treatment that can save a natural tooth for many years. 

Modern endodontics — the branch of dentistry concerned with root canal treatment — has very little in common with the stories of years past. Thanks to the microscope, advanced instruments and effective anaesthesia, today's root canal treatment is a precise, safe and, in most cases, painless procedure. 

In our article we will guide you through the entire process and explain what root canal treatment looks like step by step. We want you to feel informed and confident before your visit.

Root canal treatment step by step: How long does it take, what does it look like and what to expect?

When should I see an endodontist? Symptoms that must not be ignored

The need for root canal treatment arises when irreversible inflammation or necrosis of the pulp occurs (the richly innervated and vascularised tissue inside the tooth). The most common cause is untreated deep caries, although trauma or a cracked tooth can also be responsible.

The following symptoms should attract your attention:

  • Spontaneous, throbbing and often severe toothache.
  • Marked sensitivity to hot and cold foods that does not subside immediately after consumption.
  • Pain on biting or even on touch.
  • A change in the colour of the tooth to a darker shade (bluish, grey).
  • Swelling and tenderness of the gum in the area of the root.

Stages of root canal treatment — from diagnosis to tooth restoration

Once the diagnosis has been confirmed, the clinician presents the treatment plan. The entire process can be divided into several key stages that ensure the safety and efficacy of the procedure.

Stages of root canal treatment — from diagnosis to tooth restoration


Stage 1: Anaesthesia and preparation of the operative field

Before the endodontist begins work, effective local anaesthesia is administered. As a result, the answer to the key question — does root canal treatment hurt? — is clear: no, during the procedure the patient does not feel pain, only slight pressure or vibration.

The clinician then places a rubber dam on the tooth. This is a special rubber sheet that isolates the tooth being treated from the rest of the oral cavity. It ensures sterility, protects the patient from swallowing instruments or irrigant solutions, and provides a dry operative field.

Stage 2: Removal of the pulp and shaping of the canals

Through a small opening in the crown of the tooth, the clinician gains access to the pulp chamber and root canals. Using precise, thin instruments the entire infected or necrotic pulp is removed. The canals are then thoroughly irrigated with disinfecting solutions and shaped to prepare them for filling.

It is at this stage that root canal treatment under a microscope plays a crucial role. Thanks to magnification of up to several tens of times and excellent illumination, the clinician can locate additional canals, detect micro-cracks and clean areas that would be invisible to the naked eye.

Stage 3: Filling the canals and restoring the tooth

After thorough drying, the cleaned canals must be hermetically sealed. The most commonly used material is gutta-percha — a natural substance that, when heated, precisely fills the entire canal system, preventing re-infection.

After the completion of endodontic treatment the tooth must be solidly restored so that it can continue to fulfil its function. Depending on the degree of destruction, the clinician will recommend a direct composite restoration (filling) or a prosthetic restoration (onlay or crown), which provides the best long-term protection.

Root canal treatment under the microscope

FAQ: The most important questions about root canal treatment

We have gathered answers to the questions that most commonly concern patients before deciding on treatment.

How long does root canal treatment take?

The duration depends on the anatomical structure of the tooth (e.g. incisors usually have one canal, while molars have at least three) and the complexity of the case. A single appointment usually lasts from 60 to 120 minutes.

Root canal treatment — how many appointments are needed?

Thanks to modern techniques and materials, in many cases root canal treatment can be completed in a single appointment. If, however, the inflammation is severe or the anatomy is complex, the clinician may spread the treatment over 2–3 appointments.

What is the cost of root canal treatment?

Look after your smile — modern endodontics at our clinic

Look after your smile — modern endodontics at our clinic

We hope this article has dispelled your doubts. Remember that root canal treatment is a completely safe and effective procedure.

Would you like to make an appointment?
Leave your phone number and we will call you back