When and Why You Might Need It
At Spring Hill Dental, we understand how frustrating it can be to experience problems with a tooth that has already undergone a root canal. Root canal treatment is designed to save a tooth by removing infection and sealing the root canals to prevent reinfection. While root canals have a high success rate, there are cases where a treated tooth may not heal as expected, or infection may return months or even years later. When this happens, endodontic retreatment may be necessary to save the tooth.
Endodontic retreatment is a highly specialised procedure that involves reopening the tooth, cleaning out any remaining infection, and resealing the root canals. This treatment is often more complex than the initial root canal, which is why it is usually performed by a specialist endodontist. At Spring Hill Dental, our in-house specialist, Peter, has extensive experience in managing failed root canals using advanced technology and precision techniques.
Why Might a Root Canal Treatment Fail?
Although root canal treatment is highly effective, there are several reasons why a tooth may not heal properly or why infection may return after treatment. Understanding these reasons can help patients make informed decisions about their dental care.
One of the most common causes of failure is missed canals. Some teeth, especially molars, have multiple root canals, some of which can be extremely narrow, curved, or hidden. If a canal is not detected and treated during the original procedure, bacteria can remain inside the tooth, leading to persistent infection. This is why at Spring Hill Dental, we use a dental microscope to ensure all canals are located and thoroughly cleaned during retreatment.
Another reason for failure is incomplete cleaning or sealing of the canals. If bacteria or inflamed tissue remain inside the tooth after the initial treatment, reinfection can occur. In some cases, a filling or crown may not have sealed the tooth properly, allowing bacteria to enter and cause further infection.
Cracks or fractures in the tooth can also contribute to treatment failure. Over time, a previously treated tooth may develop tiny fractures, allowing bacteria to re-enter the root canal system. This can lead to discomfort, swelling, and further infection. Early detection of cracks is essential, which is why we use CBCT scans (3D imaging) to assess the structure of the tooth before retreatment.
Occasionally, the failure of a root canal is linked to delayed restoration. After a root canal, the tooth must be protected with a crown or permanent filling to prevent reinfection and strengthen the tooth structure. If this is delayed, bacteria may re-enter the tooth, compromising the success of the treatment.
When Should You Consider Endodontic Retreatment?
If you have had a root canal in the past and are experiencing symptoms, it is important to see a specialist as soon as possible. Some of the signs that may indicate a failed root canal include:
- Persistent or recurring pain in the treated tooth
- Swelling or tenderness in the gums near the tooth
- A pimple or abscess on the gums, which may indicate ongoing infection
- Sensitivity to hot or cold that does not improve
- A feeling of pressure or discomfort when biting or chewing
Even if you are not experiencing symptoms, a failed root canal may still be detected on a routine dental X-ray. In some cases, a developing infection may not cause pain at first, but it can still damage the surrounding bone and tissues if left untreated.
How Endodontic Retreatment Works
Endodontic retreatment is a more complex procedure than an initial root canal, as it requires carefully removing previous filling materials and addressing any complications from the original treatment. At Spring Hill Dental, we use specialist tools, microscopes, and CBCT scans to ensure the retreatment process is as thorough and effective as possible.
The procedure typically involves the following steps:
- Assessment and Diagnosis – We begin with a consultation, where we take X-rays or CBCT scans to assess the condition of the tooth and identify any remaining infection or untreated canals.
- Reopening the Tooth – The existing filling or crown is carefully removed, and the root canals are accessed again.
- Cleaning and Disinfection – Using microscopic precision, we thoroughly clean the canals, removing any bacteria, old filling material, and inflamed tissue.
- Sealing the Canals – Once the canals are completely disinfected, they are filled with a biocompatible material to prevent reinfection.
- Restoring the Tooth – A temporary filling is placed to protect the tooth until a permanent crown or restorationcan be completed by your general dentist.
The entire process is carried out under local anaesthesia, ensuring that patients remain comfortable throughout. Many patients find that endodontic retreatment relieves their symptoms and saves their natural tooth, preventing the need for extraction.
What Are the Alternatives to Endodontic Retreatment?
If a root canal has failed, retreatment is often the best way to save the natural tooth. However, in some cases, other treatment options may be considered.
One alternative is an apicoectomy, a minor surgical procedure where the infected tip of the tooth’s root is removed and sealed. This is sometimes recommended if a root canal infection persists despite retreatment.
If the tooth cannot be saved, extraction may be necessary. However, losing a tooth can lead to further dental issues, such as shifting teeth, bone loss, and difficulty chewing. If an extraction is required, we will discuss replacement options, such as dental implants, bridges, or dentures, to restore function and aesthetics.
The Benefits of Choosing Specialist Retreatment
Having an experienced endodontist perform retreatment significantly increases the chances of saving the tooth. At Spring Hill Dental, our specialist-led approach ensures:
- Higher success rates, thanks to advanced techniques and technology
- A thorough, precise procedure, reducing the risk of reinfection
- Minimally invasive treatment, preserving as much of the natural tooth as possible
- Pain-free care, with effective anaesthesia and sedation options for nervous patients
Our use of microscopes and CBCT scans allows us to treat even the most complex cases with precision, ensuring the best possible outcome for every patient.
Conclusion: Why Endodontic Retreatment Is Worth Considering
A failed root canal does not necessarily mean losing your tooth. Endodontic retreatment offers a second chance to save and restore a previously treated tooth, eliminating infection and preserving your natural smile.
At Spring Hill Dental, we are committed to providing specialist care to ensure the best possible outcome for our patients. If you are experiencing discomfort in a tooth that has had a root canal, or if your dentist has referred you for retreatment, we encourage you to get in touch. Our specialist endodontic team is here to answer your questions and guide you through the process, ensuring that your treatment is as effective and comfortable as possible.
