Root Canal Treatment

What is root canal treatment?

Inside every tooth is a soft core of nerves and blood vessels called the pulp. When bacteria reach it, through deep decay, a crack or a failing restoration, the pulp becomes inflamed and eventually dies. The tooth cannot clear that infection on its own, because the pulp chamber has almost no blood supply once it is compromised.

Root canal treatment, also called endodontic treatment, removes the infected pulp, cleans and shapes the fine canals inside the roots, and seals them so bacteria cannot return. The outer tooth stays in place and continues to function. The alternative, once the pulp is lost, is extraction and replacement with a single implant or bridge, which is a larger and more expensive undertaking than saving the natural tooth.

Symptoms that suggest you need a root canal

Pulp inflammation announces itself in fairly recognisable ways, though not every case is painful. Common signs include:

• Lingering sensitivity to hot or cold that lasts well after the stimulus is gone
• Spontaneous, throbbing pain, often worse at night or when lying down
• Pain on biting or pressing on one particular tooth
• Swelling or a small pimple-like bump on the gum near the tooth
• A tooth that has darkened compared with its neighbours
• No symptoms at all, with the infection found on a routine X-ray

When pain suddenly stops

A tooth that has ached for weeks and then goes quiet is not necessarily healing. Often the pulp has died and the nerve can no longer signal. The infection continues at the root tip and can develop into an abscess. Your dentist confirms after examination and imaging whether the tooth is still vital.

The procedure step by step

Endodontic treatment at the clinic follows a consistent sequence, and each step is explained to you before it begins.

• Examination and X-ray, with CBCT imaging where the canal anatomy is unusual
• Local anaesthetic, so the tooth and surrounding tissue are fully numb
• A rubber dam isolates the tooth, keeping it dry and free from saliva
• A small opening is made in the crown of the tooth to reach the pulp chamber
• Under the microscope the canals are located, cleaned, disinfected and shaped
• The canals are filled with a biocompatible material and sealed
• A temporary or permanent filling closes the access, and a crown is planned if required

One visit or two? Microscope-assisted vs conventional treatment

The deciding factor is the extent of infection and the complexity of the root anatomy. Upper molars, for example, often have a fourth canal that is easy to miss without magnification. Microscope-assisted treatment lets the dentist see these fine structures directly, which improves cleaning and reduces the chance of a missed canal causing later trouble.

Where the infection has spread beyond the root tip, a medicated dressing may be left inside the canals for a week or two before the final filling. For international patients this is planned around your stay, so the second appointment falls within the same visit schedule rather than requiring a separate trip.

Retreatment of a failed root canal

A tooth treated years ago can become reinfected if a canal was missed or the seal has leaked. Retreatment removes the old filling material, cleans the canals again and reseals them. It is more demanding than first-time treatment, but it is frequently possible to keep the tooth.

Aftercare after root canal treatment

Mild tenderness on biting for a few days is normal while the tissue around the root settles. Over-the-counter pain relief is usually sufficient. You can eat once the anaesthetic has worn off, ideally on the other side of the mouth until the permanent restoration is in place.

A root-treated tooth is drier and more brittle than a living tooth, and a back tooth in particular is at risk of splitting under chewing forces. That is why a zirconia crown or an onlay is usually recommended for molars and premolars, and why it should not be delayed for long. Full written instructions are provided in your aftercare guide.

What happens if a root canal is delayed

Left untreated, the infection at the root tip does not stay local. It forms an abscess, which can cause facial swelling, fever and severe pain, and it slowly dissolves the bone around the root. The longer this continues, the less bone remains to support the tooth, or a future implant in its place.

In rare cases a dental infection spreads to the surrounding spaces of the face and neck and becomes a medical emergency. A tooth that is treatable today may not be treatable in six months, which is the main argument for acting on early symptoms.

Risks and limitations

Root canal treatment is highly predictable, but no procedure is without risk. Canals can be unusually curved or calcified, instruments can occasionally fracture inside a canal, and a small percentage of teeth do not heal as expected and need retreatment or a minor surgical procedure at the root tip. Teeth with a vertical crack running down the root cannot be saved by root canal treatment and are better extracted.

Your dentist assesses each of these factors on imaging before recommending treatment, and explains the likely outcome for your specific tooth. Where the prognosis is poor, you will be told so, and alternatives are discussed within the wider general dentistry plan.