In untreated, progressing decay, microorganisms can reach the pulp inside the tooth, which contains blood vessels and nerves. Inflammation may develop in this tissue, and in advanced cases the pulp may lose its vitality. If non-vital or infected tissues are left untreated, inflammation and an abscess may develop in the tissues around the root tip. Not every cavity progresses at the same rate, and not every tooth produces the same symptoms. Assessment therefore considers examination findings and any necessary imaging, rather than relying on pain alone. Dental infections can sometimes spread to surrounding tissues and affect general health. Assessment is particularly important in people with a suppressed immune system. Fever, increasing facial swelling, significant difficulty opening the mouth, or difficulty swallowing or breathing require urgent medical assessment without delay. However, it is incorrect to assume that every dental infection constantly threatens all organs.
Pulp damage does not arise only from decay; an impact or injury to a tooth can also damage its blood vessels and nerves. A disruption in blood circulation can cause the tooth to lose vitality over time. Responses to hot and cold vary: some teeth cause no pain, while others develop sensitivity or colour changes. These symptoms alone do not establish a diagnosis. A dentist prescribes antibiotics for specific infections when indicated; antibiotics do not replace root canal treatment or necessary drainage to address the problem inside the tooth. Delayed treatment can lead to changes in the bone around the root tip. After trauma, the tooth is assessed through examination, vitality testing and appropriate imaging, with follow-up at suitable intervals when needed.
Whatever the cause, a tooth that is painful or shows signs of infection needs assessment. Relief from painkillers does not mean the problem has been resolved. Taking antibiotics or other medicines without professional advice is inappropriate. Delaying treatment may affect the available options and the possibility of preserving the tooth.
Root canal treatment involves removing inflamed or infected pulp, then cleaning and shaping the root canals with mechanical instruments and appropriate irrigating solutions. The canals are then filled with suitable materials. The visible part of the tooth is completed with a well-sealed restoration; this stage is important for the long-term outcome of treatment.
1. What Is Root Canal Treatment with Rotary Instruments?
Root canal treatment may use hand instruments and motor-driven rotary or reciprocating systems. Depending on the canal anatomy, these methods may be used together.
a. The files used in these systems help shape the canals. Cleaning is not performed with files alone; appropriate irrigating solutions are also used. Canal anatomy affects the extent of the procedure.
b. Some motors have torque control and automatic reverse functions. These help manage the load on the instrument, but do not eliminate the risk of a file breaking inside the canal.
c. Flexible nickel-titanium files can be used to shape curved canals. Hand instruments may also be needed at different stages. Procedure duration and the number of appointments depend not only on the file used but also on canal anatomy, infection and treatment complexity.
d. Electronic devices called apex locators help determine the working length. Measurements are interpreted together with clinical assessment and radiographs when needed. Preparing the canals to an appropriate length is important; using a device alone does not guarantee that a filling will not be too short or extend beyond the root tip.
2. Is There Pain During or After Root Canal Treatment?
Root canal treatment is generally performed under local anaesthesia to control pain during the procedure. Its effect can vary with the individual and the inflammation in the tooth. Additional anaesthesia or different approaches may sometimes be necessary. Pain during treatment should be reported to the dentist. Temporary sensitivity and discomfort when chewing can occur afterwards. This is not caused solely by incomplete removal of the nerves at the first appointment; inflammation in the tissues around the root and their response to treatment can also contribute. Medicines for pain control are selected individually. Increasing pain or swelling requires reassessment.
3. How Long Does Root Canal Treatment Take, and How Many Appointments Are Needed?
Some teeth can be treated in one appointment. Two or three appointments may be required because of canal number and anatomy, infection, or the need to repeat previous treatment. When necessary, medication is placed inside the canals between appointments and the tooth is sealed with a temporary filling. The use of these medications and the waiting period are determined by examination findings.
4. How Is the Success of Root Canal Treatment Assessed?
Root canal treatment cannot be guaranteed to succeed in every case. Factors influencing the outcome include canal anatomy, the extent of infection, cracks, remaining tooth tissue and the condition of the final restoration. Clinical and radiographic follow-up is required. A first review may be planned at around six months, although the interval depends on the tooth's condition. An absence of pain does not always mean complete healing. A problem appearing months or years later cannot be explained solely by incorrect treatment; new decay or leakage around a restoration may also be involved.
5. Must a Previously Root-Treated Tooth with a New Problem Always Be Extracted?
Extraction is not always necessary. After assessing whether the tooth can be preserved, repeat root canal treatment or, in suitable cases, root-end surgery may be considered. The decision depends on cracks, tissue loss and the condition of surrounding tissues.
6. Why Might a Root-Treated Tooth Hurt During a Flight?
Pressure changes during travel can make pre-existing problems in a tooth or its surrounding tissues noticeable through pain. This cannot be explained only by trapped air in the canal or an incomplete filling. The tooth and any restoration need assessment. A decision about repeating root canal treatment is made after examination and imaging.