Root apex resection

Root resection is a surgical dental procedure during which the doctor removes the tooth root apex along with a cyst or other inflamed tissues. The procedure is performed in cases of chronic inflammation at the root to preserve the patient’s own tooth and avoid extraction. This procedure also goes by two other names—apexectomy or apicoectomy.

What does tooth resection mean, and what does the procedure’s name signify? The word “resection” comes from Latin resectio and means partial tissue removal. The tooth root apex is the apical part of the root through which infection from the root canal can spread into the bone. A root cyst is a pathological formation that develops as a result of a prolonged inflammatory process.

The tooth root is located within the jawbone and is surrounded by periapical tissues—the periodontium and bone around the apex. This is precisely the area where inflammation most commonly develops with complicated cavities or poor-quality canal treatment.

During root apex resection, approximately 3–5 mm of the root is removed along with the affected tissues. The tooth itself remains in place and continues to perform its chewing function.

The key difference between resection and tooth extraction is that resection allows for elimination of the infection source without losing the tooth. It’s a less traumatic solution that helps preserve bite alignment, aesthetics, and avoids complex prosthetic work.

Before surgery, the doctor always evaluates the tooth’s condition and surrounding tissues. There are certain limitations due to which intervention may be dangerous or ineffective. They’re divided into absolute and relative contraindications, and consideration of these factors allows treatment to be performed safely and as effectively as possible.

Absolute Contraindications

These are situations when root apex resection is categorically not performed:

• Significant crown destruction (more than 50%), making further restoration impossible
• Vertical crack or root fracture
• Advanced periodontitis with grade 3–4 tooth mobility
• Root resorption exceeding one-third of its length
• Large cyst size (more than 30% of root length)
• Tight proximity of adjacent tooth roots
• Acute inflammation stage with significant soft tissue swelling

Relative Contraindications

These are temporary limitations where surgery is postponed until the patient’s condition stabilizes:

• Acute episodes of chronic conditions
• Unstable diabetes
• Pregnancy (especially 1st and 3rd trimesters)
• Acute infectious diseases
• Blood clotting disorders
• Mental disorders in acute stage

Dentists always evaluate these contraindications before planning root apex resection to ensure safe and effective treatment.

Recovery after root resection is an important treatment stage on which healing speed and final surgery outcome depend. After surgical intervention, the body needs time to restore soft tissues and bone, so following the dentist’s recommendations is of key importance. In the first days after resection, moderate pain, gum swelling, feeling of pressure or discomfort in the surgery area are possible. Such symptoms are considered normal and gradually decrease. The active recovery phase usually lasts 4–7 days, and complete bone tissue healing takes 3 to 6 months. Follow-up visits to the dentist are mandatory after surgery. Suture removal is performed on day 7–10 after resection. A control X-ray at 3 months allows assessment of the beginning of bone regeneration, and repeat radiological examination at 6–12 months confirms complete healing and bone tissue restoration. Following the examination schedule is important for timely detection of possible complications.

What You Can and Cannot Do After Resection

After root resection, certain restrictions must be observed. Prohibited are: intense physical activity for a week, visiting sauna and pool, any thermal procedures and overheating. Chewing on the surgery side in the first 3-5 days is not recommended, nor is smoking or alcohol consumption, as this slows healing. In the first two days, active mouth rinsing should be avoided due to bleeding risk, and a hard toothbrush should not be used in the surgery area. Recommended: consuming soft or liquid food for the first three days, sleeping on an elevated pillow to reduce swelling, maintaining careful oral hygiene, and drinking adequate amounts of water. Following these recommendations significantly accelerates recovery after root resection and reduces complication risks.

Possible Complications and Consequences of Resection

Overall, reviews about tooth resection are positive—those who’ve undergone the procedure are satisfied with the result—the tooth is saved and pain has decreased. And although tooth resection is a well-established and predictable surgical intervention, however, like any surgery, it may be accompanied by complications. They occur infrequently and are usually related to individual body characteristics, clinical case complexity, or non-compliance with post-operative recommendations. Conventionally, complications are divided into early and late.

Early Complications

Early complications arise in the first days after root resection. Most commonly, this is bleeding, which may appear with routine violations, active rinsing, or physical activity. Also possible is post-operative wound infection in case of non-compliance with oral hygiene or missing prescribed antibiotics. Sometimes suture dehiscence due to mechanical trauma or allergic reaction to medications used during treatment is observed.

There are symptoms that require immediate dental attention. These include severe throbbing pain not relieved by pain medications, body temperature elevation above 38°C for more than two days, appearance of purulent discharge from the wound, or increasing swelling after the third day from surgery.

Late Complications

Late complications may appear several weeks or even months after resection. The most common is cyst recurrence, which occurs in approximately 5–10% of cases and is usually related to incomplete removal of the cyst lining or re-infection. Also possible are root fracture due to weakening of its structure, fistula formation, or development of periostitis—inflammation of the periosteum.

The main causes of late complications are: poorly performed initial root resection, non-compliance with recommendations during recovery period, poor oral hygiene, and overall immune system decline. Regular follow-up examinations and responsible attitude toward post-operative care significantly reduce the risk of negative consequences of tooth resection and ensure successful treatment outcome.