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Endodontics: What Happens at a Root Canal Appointment?

At the root canal treatment appointment, whether it is an emergency visit or a regularly scheduled visit, the patient will be cared for by various members of a trained and professional team. A primary goal of the dental team is to make certain that the patient is comfortable physically and emotionally during every stage of treatment. In addition to relieving tooth pain, if present, the goals of endodontic treatment are to eliminate endodontic disease and move the patient towards a state of health. With modern endodontic techniques, these goals can generally be achieved. Root canal treatment may take one or more visits to complete and usually progresses through the following stages:

1. The dentist reviews the findings and recommendations from the examination and consultation visit. If any additional radiographs are needed before starting treatment, they may be taken at this time.
2. The patient is typically given a local anesthetic. With newer techniques and devices, these anesthetics can usually be administered painlessly. The tooth can be made "profoundly" numb so that the patient is completely comfortable during treatment.
3. After achieving the required level of anesthesia, the dentist "isolates" the tooth using a "dental dam." This is a sheet of rubber material that fits over the tooth to be treated and forms a tight seal around it. The rubber dam serves to keep the saliva away from the area being treated and it also prevents the various disinfecting and cleaning solutions used during the procedure within the tooth from entering the mouth.
4. After the tooth has been isolated, the dentist prepares a window (an "access" opening) through the biting surface of the tooth in order to gain access into the diseased root canal space.
5. Once the access preparation is complete, the dentist begins to "clean" the root canal space by removing the diseased pulp tissue, bacteria, and related irritants. This is done using special solutions and small flexible instruments, called "files." The solutions penetrate and clean areas of the canal where the instruments cannot physically reach.
6. As the root canal system is being cleaned, it is also being "shaped." Shaping is the process of enlarging the root canal space in such a way that it can be thoroughly cleaned and subsequently filled and sealed. A root canal space that is not properly shaped may still harbor bacteria.
7. Following cleaning and shaping procedures, the root canal space is ideally filled and sealed in all its dimensions by a dentist. This is most commonly accomplished using a sealing cement in combination with a unique material called "gutta percha." Gutta percha is a special material that can be softened with heat and then pressure molded to precisely fill the root canal space.
8. Once the tooth is three-dimensionally sealed, it is generally "provisionalized" (temporarily restored) until a more long-lasting protective restoration can be placed. A protective restoration helps minimize the chances of future tooth fracture.

By Clifford J. Ruddle, DDS, in collaboration with Philip M. Smith, DDS

Will I Be Comfortable During My Root Canal Treatment?

The answer should be an emphatic "YES!" Fortunately, dentistry has developed new techniques for delivering local anesthetics painlessly. These techniques also assure that the anesthetics act more rapidly and produce a more "profound" level of anesthesia. Additionally, modern dental procedures utilize better technologies that are generally much less traumatic and invasive than those of the past. The result of these advancements is that patients should have minimal or no discomfort during the tooth numbing and/or treatment procedures. Root canal treatment should not cause pain, but rather relieve it and keep it from reoccurring. Unfortunately, dental pain may also have a psychological component, possibly stemming from a negative past experience, a story in the media, or even fear of the unknown. Sometimes these situations can prove challenging for the patient and the endodontist to control. Examples include:

• Patients who associate tooth pain with a past root canal procedure when, in fact, the pain they remember was experienced prior to their emergency visit. Oftentimes, this pain develops over a period of several hours to a few days and is allowed to build and worsen before seeking treatment. Once the patient seeks emergency care from a root canal dentist, the endodontics treatment should not be uncomfortable and should provide quick and certain relief from any painful symptoms stemming from root canal disease.
• Patients may become very anxious when being examined or treated dentally because the mouth is such an important part of the body and psyche. Some patients may feel anxious and vulnerable during a root canal procedure because of their positioning in the dental chair with members of the dental team working above them in such close and intimate proximity.

These and other distresses are real to the patient. Much of the time, however, the distress can be reduced or eliminated if the patient discusses it with the endodontist and gets understanding and reassurance. The doctor and the patient must work together in these situations to make certain that the patient feels as comfortable, trusting, and informed as possible in the dental environment. Most individuals can do this satisfactorily. If patients continue to feel significant distress, even after having these discussions with the dentists, they should be aware that there are therapeutic methods that can be used and for which they might be candidates. These may include:

• Oral sedation dentistry involves ingesting a sedative pill or liquid before the appointment. This can help anxious patients a great deal and make the treatment experience much less stressful.
• Nitrous oxide analgesia, known as "laughing gas," can be inhaled along with oxygen to make patients feel less anxious and more comfortable.
• Intravenous sedation can be administered in a dental facility by a specially trained and certified dental team or by a specially trained dental anesthesiologist. With intravenous sedation, patients are not asleep and they can still respond, but they will not feel or remember anything. This technique works very well in creating a pleasant experience for many anxious patients and is a good anesthetic method for more lengthy dental procedures.
• Hospital dentistry is conducted in an environment where a variety of anesthetic methods are available and can be used under the safest medical conditions. General anesthetic and intravenous sedation can both be utilized in the hospital setting.

These sedative techniques and medicines may also be helpful if particularly lengthy root canal treatment procedures are necessary in specific situations.

With all of the advancements in pharmaceuticals and in their delivery, there should be no need for any patient to delay endodontics treatment because of fear that the treatment will be painful.

By Clifford J. Ruddle, DDS, in collaboration with Philip M. Smith, DDS

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