If root canal treatment is ineffective or impossible, dentists usually recommend extracting the affected tooth. However, there is one procedure that can give an infected tooth a last chance. This is root-end resection, or apicoectomy.
Let us take a detailed look at this technique and explain in which cases and how it is used.
What Is an Apicoectomy and Why Is It Needed?
An apicoectomy is a minor surgical procedure during which a surgeon removes a small portion of the tip of the tooth root together with the surrounding infected tissues. This procedure is used when a focus of infection remains at the root apex even after root canal treatment. In this way, it is possible to preserve the tooth and avoid prosthetic treatment in the future.
The American Association of Endodontists (AAE) notes that apicoectomy is the most common surgical procedure for saving a tooth when infection or inflammation persists in the bone around the root apex after conventional root canal treatment.
Main reasons for recommending the procedure:
- Apical periodontitis or a dental cyst. Apical periodontitis is an inflammatory reaction of the tissues surrounding the root apex, most often caused by an infection of the root canal. If caries remains untreated for a long time, inflammation from the pulp spreads toward the roots of the tooth.Apical periodontitis can occur as an independent condition or may develop as a consequence of an untreated inflammatory process. The disease often progresses without severe pain but can lead to gradual bone destruction.
- A cyst at the tooth root is a fluid- or pus-filled cavity that forms in the bone tissue around the root apex. It most often develops as a complication of chronic periodontitis, when infection from the root canal extends beyond the tooth and causes localized tissue destruction. Although a cyst is a consequence of periodontitis, its appearance indicates that the inflammatory process has already progressed beyond a simple localized infection. This is no longer just an infection within the root — it is bone involvement that requires more comprehensive treatment. The longer it persists, the greater the volume of tissue lost and the more difficult it becomes to preserve the tooth.If, several months after root canal treatment, the lesion persists on X-rays or symptoms remain, the dentist may consider surgical treatment. Apicoectomy makes it possible to remove the dental cyst together with the root apex and prevent further spread of the infection
- Inability to perform complete root canal treatment by conventional means.
This refers to situations when the dentist cannot completely clean and fill the root canal. Possible causes include narrowing of the root canal, the presence of a broken instrument or a post in the canal that cannot be removed, as well as complex root anatomy. - Recurrent periodontitis after previous tooth treatment. If a tooth already has a root canal filling or an existing prosthetic restoration or crown, and retreatment of the canals is difficult or has not produced the desired result, surgical root-end resection can help eliminate the residual infection without removing the crown or prosthetic restoration.
- A perforation in the root or in the area of the floor of the tooth cavity. If a perforation cannot be closed from the root canal side, surgical access may be considered in some cases. The treatment approach depends on the location and size of the defect.
The decision to perform an apicoectomy is made only after a thorough diagnostic assessment: analysis of dental X-rays or computed tomography (CT) scans, evaluation of the overall condition of the tooth, and assessment of the patient’s general health. The dentist determines whether surgery is worthwhile or whether extraction would be a better option if the prognosis is questionable, followed by replacement with an implant. Therefore, at Yarema Dental, a comprehensive examination is always performed before surgery.
If the benefits of preserving the tooth outweigh the alternatives, apicoectomy is the optimal choice.
What Are the Contraindications to Apicoectomy?
Root-end resection is a minimally invasive procedure; however, it has a number of contraindications.
It is not performed or is postponed in the following cases:
- Acute purulent inflammation in the abscess stage. In acute periodontitis, the pus should first be drained, and only then should the surgery be performed. Systemic antibiotics are not prescribed in every case, but only when clinically indicated.
- Generalized periodontitis and severe tooth mobility. In cases of significant loss of periodontal and bone support, the prognosis of the tooth may be unfavorable, so the appropriateness of apical surgery is assessed individually.
- Significant destruction of the crown or a root fracture. If only the walls of the tooth remain, or if there is a vertical root fracture, unfortunately, such a tooth cannot be preserved. Root-end resection is only appropriate for structurally sound teeth.
- Serious systemic diseases.
Apicoectomy is generally not recommended for patients with decompensated cardiovascular disease, severe diabetes, blood-clotting disorders, or other conditions that make any surgical procedure risky. The patient’s general condition must first be stabilized, and approval from the treating physician should be obtained. - Pregnancy. Pregnancy itself is not an absolute contraindication to apical surgery. If the intervention is necessary, it is performed with consideration of the stage of pregnancy, the patient’s condition, and the recommendations of the treating physician. Elective procedures that are not urgently required may be postponed.
- The tooth root is too short. Root-end resection is generally not performed if the root is not long enough and the remaining root after surgery would be too short to withstand normal chewing forces. Surgery is also not recommended if the cyst is located in an extremely unfavorable area, for example, close to the floor of the maxillary sinus or a major nerve, and the risks outweigh the potential benefits. In each case, the dental surgeon individually assesses whether apicoectomy is safe and appropriate.
What Techniques Are Used During an Apicoectomy?
Modern apicoectomy is a microsurgical procedure characterized by high precision and predictable results.
Operating microscope or high-powered magnification. Under high magnification and with high-quality illumination, the surgeon can see the smallest details of the surgical field. This allows the root tip to be resected more precisely and infected areas to be cleaned without damaging healthy tissues.
Microscopic apicoectomy requires a significantly smaller bony window and a smaller gingival incision than traditional surgery. For the patient, this means less tissue trauma and faster healing.
At Yarema Dental, this procedure is always performed under magnification. The AAE also emphasizes the role of the operating microscope, microsurgical instruments, and modern materials in contemporary apical microsurgery.
Ultrasonic root-end preparation tips. After the root tip has been resected, a small cavity several millimeters deep must be created in the root for hermetic filling. In the past, a dental bur was used for this purpose; today, ultrasonic technology is commonly used.
Special thin ultrasonic microsurgical tips allow the creation of a canal approximately 3 mm deep. This provides maximum preservation of healthy tooth and bone tissue and creates an optimal cavity shape for filling. In addition, unlike traditional burs, ultrasound reduces the risk of root microcracks.
Mineral trioxide aggregate (MTA) and bioceramic materials. Special materials — MTA or other biocompatible cements — are used to seal the end of the root. MTA has the ability to set in a moist environment, hermetically seal the canal, and provide high biocompatibility. These materials are used for tight sealing of the prepared cavity.
Studies show that the use of MTA for root-end filling significantly increases the success rate of the procedure compared with older materials.
Modern suturing materials and techniques. Microsurgical apicoectomy involves the placement of delicate sutures (5-0, 6-0) to precisely close the gingival incision. Such sutures are less traumatic to the tissues and can be removed as early as 5–7 days after surgery.
In addition, atraumatic incision and tissue-reflection techniques are used to minimize discomfort and promote better postoperative recovery.
How Is Root-End Resection Performed?
An apicoectomy usually takes 30 minutes to 1 hour, depending on the complexity of the case. At Yarema Dental, the procedure is carefully planned and performed according to European and Swiss dental protocols to ensure the most predictable result and patient comfort.
The main stages are as follows:
Diagnosis and preparation. The procedure begins with a detailed examination and X-ray diagnostics, and, if necessary, a 3D CT scan.
Anesthesia. The procedure is performed under effective local anesthesia and is therefore painless for the patient. The injection is administered near the root of the affected tooth or the corresponding nerve, and the anesthesia lasts long enough to ensure that the patient does not feel the procedure. If the patient is very anxious, we offer medication-induced sleep (sedation) under the supervision of an anesthesiologist.
Removal of bone tissue (osteotomy). The surgeon creates a small bony access window sufficient to visualize the root apex and work with microsurgical instruments. Through this opening, the root apex and the pathological tissues surrounding it become visible.
Root-end resection and removal of affected tissues. Using specialized microsurgical instruments, the dentist resects the apical portion of the root, usually 2–3 mm from the tip. This is the area where lateral canal branches are most commonly located and where bacteria may remain. At the same time, all inflamed granulation tissue, the cyst, and pus around the root are removed. After resection and cleaning, the surgical site is rinsed with antiseptic solutions for disinfection.
Retrograde root-end filling. Under the microscope, a small cavity approximately 3 mm deep is prepared in the exposed end of the root using an ultrasonic tip. The cavity is prepared along the axis of the root canal; where possible, the dentist also addresses anatomical features such as isthmuses and additional canals. The cavity is then filled with the prepared filling material. Most commonly, this is MTA or another bioceramic cement. The material sets and tightly seals the canal from the root-end side, preventing bacteria from penetrating from the canal into the bone.
Bone defect filling (if necessary). Under certain conditions, the doctor may place a bone substitute material or membrane. This contributes to faster restoration of the bone structure. However, in cases of small defects, additional materials may not be required, as the bone is capable of healing on its own. It has been proven that after a properly performed apicoectomy, new bone tissue naturally fills the cavity over the course of several months. However, the speed and completeness of healing depend on the size and type of the defect.
Suturing the wound. After all procedures are completed, the gum is closed with fine sutures. We use modern atraumatic suturing materials that do not cause tissue irritation. Usually, several small sutures are placed to maintain the tissues in the correct position during healing.
In some cases, a small drain may be placed for 1–2 days if there was a significant amount of pus. At the end of the procedure, a gauze dressing may be placed over the surgical area.
Postoperative recommendations. After an apicoectomy, the doctor provides instructions to speed up your recovery. The main recommendations are as follows: do not eat for the first 2–3 hours, avoid hot food and drinks during the first day, and do not chew anything on the operated tooth. You should also not rinse your mouth for 24 hours to avoid provoking bleeding. It is also recommended to avoid physical exertion for 2–3 days and not to visit a sauna or solarium. The doctor may prescribe painkillers and anti-inflammatory medications. Sutures, if non-absorbable ones were used, are usually removed after 5–7 days. If necessary, a follow-up examination is scheduled in a few weeks.
Monitoring the healing process. The gums heal within 1–2 weeks, while bone regeneration takes longer. Approximately 6 months after the procedure, a follow-up X-ray or CT scan is recommended to confirm that the bone tissue around the root is regenerating and that the periapical lesion is healing.
According to the AAE, the bone around the resected root regenerates over several months, while patients can return to their normal daily activities as early as the following day.
How Effective Is the Procedure?
Modern endodontic microsurgery has high success rates. In a 2018 meta-analysis, the weighted success rate for modern microsurgery was 94.4%, compared with 82.2% for traditional apical surgery.
However, the outcome depends on the length of follow-up, the condition of the tooth, and the specific characteristics of each case. In the long term, success rates may be lower than those reported in studies with shorter follow-up periods.
In other words, the prognosis after apicoectomy today is very favorable. The vast majority of teeth remain functional for many years after surgery.
Factors that may reduce the success rate:
- significant periodontal involvement;
- the need for repeat resection of the same tooth;
- failure to follow postoperative recommendations.
At Yarema Dental, we do everything possible to ensure that your case has the best possible prognosis: we carefully assess the indications, use advanced technologies and high-quality materials, and support you throughout the entire recovery process.
If you have been diagnosed with a dental cyst or chronic inflammation around the root, do not rush to agree to extraction. Visit Yarema Dental for a consultation — apicoectomy may be the solution that allows you to preserve your natural tooth.
This article does not replace a medical consultation. For complete and personalized information, please consult your dentist.