What is root canal treatment?
The dental pulp is a specialized connective tissue containing blood vessels and nerves, located within the pulp cavity and surrounded by the hard tissues of the tooth (enamel and dentin). The pulp enters from the apex of the tooth root.
Each tooth root may have one or more root canals, including accessory canals. This system of root canals is involved in sensory function, nourishing and repairing dentin.
Root canal treatment is the process of removing the inflamed pulp of a tooth, cleaning and disinfecting the pulp cavity – the space containing nerves – to effectively reduce pain and discomfort and preserve the natural tooth.
Why should root canal treatment be done early?
Some signs that a tooth needs root canal treatment include: tooth pain when eating or drinking, especially hot or cold foods; loose teeth; swollen gums near the affected tooth; pus draining from the affected tooth; swelling of the cheek or jaw; and discoloration of the tooth.
Root canal treatment is necessary when an X-ray shows damage to the tooth pulp due to bacterial infection. This can cause pulpitis, creating conditions for bacteria to multiply and spread.
- Preventing the spread of infection: Pulpitis can spread to the root of the tooth, causing abscesses and facial swelling.
- Giảm đau nhanh – tránh đau dữ dội: Viêm tủy giai đoạn đầu đau âm ỉ, để lâu sẽ tăng mạnh.
- Bảo tồn răng thật: Giúp giữ răng, tránh nhổ bỏ.
- Tiết kiệm chi phí: Chi phí điều trị sớm thấp hơn so với xử lý biến chứng.
- Tránh ảnh hưởng sức khỏe toàn thân: Nhiễm trùng kéo dài có thể gây sốt, mệt mỏi, ảnh hưởng tiêu hóa.
Which teeth require root canal treatment?
Teeth that require root canal treatment include:
- Severe tooth decay reaching the pulp
- Severe toothache, pain at night, or spontaneous toothache.
- The cavity is large; bacteria have invaded the pulp chamber.
- Acute or chronic pulpitis
- Sharp pain when eating hot/cold/sweet foods.
- Prolonged soreness after stimulation.
- The pain may be a dull ache or come in waves.
- Injured tooth
- Broken, chipped, or cracked teeth expose the pulp.
- Teeth can change color after trauma (usually gray-black).
- Infected tooth – periapical abscess
- Swollen gums, pus, or lumps at the base of the teeth.
- Pain radiates to the temples, ears, or down the jaw.
- Possible side effects include fever and bad breath.
- Treatment before prosthetics
- In some cases, root canal treatment is necessary before crowning/placing a tooth if the tooth is weak or significantly worn.
Principles of root canal treatment
Some principles of root canal treatment include:
- Sterilization.
- Complete removal of infected pulp.
- Thorough cleaning of the root canal system.
- Three-dimensional root canal filling.
A systematic root canal treatment procedure.
A proper root canal treatment procedure will include:
1. Before root canal treatment
The dentist will take X-rays of the patient’s teeth to clearly see the internal structure of the root canal and assess the extent of the damage.
2. During root canal treatment:
- Step 1: The patient receives local anesthesia.
- Step 2: The dentist places a shield around the tooth being treated to prevent the patient from swallowing the irrigation solutions during the procedure.
- Step 3: The dentist uses a drill to prepare the area of the tooth to be treated.
- Step 4: The dentist cleans and removes bacteria from the root canal.
- Step 5: If there is an abscess on the outer surface of the tooth root, the dentist will drain the fluid.
3. After root canal treatment
The root canal will be filled and the tooth will be sealed with a filling or crown. If the patient shows symptoms of infection, such as the wound feeling hot or swollen, the doctor will prescribe antibiotics to control and prevent the infection from progressing.
Some frequently asked questions
Typically 30–90 minutes per tooth, depending on the degree of inflammation and root canal structure.
Complex teeth may require 2–3 appointments.
With proper care, teeth can last for several decades, even a lifetime.
Teeth that have undergone root canal treatment are usually weaker than normal teeth, so dentists often recommend crowns or protective fillings.
The anesthesia process should be virtually painless.
Some mild soreness may occur a few days after treatment, which will gradually subside. Long-term soreness is rare.
Mild pulpitis may be treated in one visit.
Severe pulpitis or teeth with multiple root canals may require 2–3 appointments.
Widespread pulpitis causes severe pain, facial swelling, abscesses, and fever.
Teeth may become loose, leading to tooth loss, affecting aesthetics and chewing function.
Prolonged infection can affect overall health.
Typically, teeth that have undergone root canal treatment can last from 15 to 25 years. Fillings after root canal treatment can partially support chewing function, but they are unlikely to achieve the same durability and effectiveness as natural teeth.
After root canal treatment, teeth often become brittle, weak, and prone to fracture if only filled with conventional fillings. Therefore, to extend the lifespan of root canal-treated teeth, dentists at Viet Anh Dental Clinic often recommend restorative solutions such as porcelain inlays/onlays or crowns.
Porcelain crowns not only protect the tooth from damage but also improve its ability to withstand chewing forces, extend its lifespan, and maintain the aesthetics of the treated tooth.
Root canal treatment is just the first step; proper restoration is what ensures long-term tooth health. Let Viet Anh Dental Clinic be your partner in protecting your lasting smile.
