Maxillary Antrostomy

Overview

Maxillary antrostomy is an endoscopic sinus procedure that enlarges the natural drainage opening of the maxillary sinus — the large air-filled cavity in each cheekbone. When this opening is blocked by inflammation, polyps, or anatomy, mucus becomes trapped and the sinus cannot ventilate, leading to recurrent or chronic infection. Widening the opening restores drainage and airflow.

It is one of the most common components of functional endoscopic sinus surgery (FESS) and is performed entirely through the nostrils with a telescope and fine instruments, leaving no external scars. It may be done alone for isolated maxillary disease or together with surgery on other sinuses. It also improves how well nasal rinses reach the sinus afterwards.

This page is an educational overview only. It is not medical advice, and no outcome can be guaranteed. A specialist decides whether maxillary antrostomy is appropriate for you.

Who May Need This

Maxillary antrostomy may be considered for people with chronic or recurrent maxillary sinus disease — persistent cheek pressure, nasal blockage, discharge, or repeated infections — that has not responded to medical treatment. It is also used to remove retained mucus, fungal debris, polyps, or cysts from the sinus, and to access the sinus for other conditions.

It may be recommended when the maxillary sinus is a main site of disease, sometimes because a tooth-related infection or a blocked opening keeps the sinus congested. Eligibility is determined by an ENT specialist after nasal endoscopy and a CT scan confirm the problem.

When It May Be Recommended

The procedure may be recommended when medical treatment has failed to control maxillary sinus symptoms, when imaging shows a persistently blocked or diseased sinus, or when material such as a fungal ball, cyst, or polyp needs to be removed. It is also used to establish drainage before or alongside treatment of a dental source of infection.

The decision weighs the likely improvement against the risks of surgery and the possibility of recurrence. Medical treatment is usually optimised first. The final recommendation depends on individual evaluation.

Diagnosis and Evaluation

Evaluation includes a history of sinus and dental symptoms, a nasal endoscopy to view the drainage area, and a CT scan of the sinuses, which shows the maxillary sinus, its opening, and the nearby anatomy including the eye socket floor and tooth roots. This planning is important for safe surgery.

A dental assessment may be arranged if a tooth is the source of infection. Allergy and general health are considered, and medications and bleeding tendency are reviewed. A second opinion may be valuable for revision cases or unusual findings.

Treatment Options

Maxillary sinus disease is first treated medically — steroid nasal sprays, saline rinses, treatment of infection and allergy, and dealing with any dental cause. Many people improve without surgery.

When surgery is needed, endoscopic maxillary antrostomy is the usual option, often as part of wider FESS if other sinuses are involved. A minimally invasive balloon dilation of the opening is an alternative in selected cases, and the traditional Caldwell-Luc approach is reserved for specific situations. The surgeon recommends the approach that fits the disease.

How It Is Performed

Maxillary antrostomy is performed under general anaesthesia (or local with sedation for limited procedures). Using an endoscope passed through the nostril, the surgeon identifies the natural maxillary sinus opening and enlarges it with fine instruments, removing obstructing tissue, polyps, or retained material so the sinus can drain and be ventilated. There are no external incisions.

Where relevant, other diseased sinuses are addressed in the same operation. Dissolvable material or light packing may be placed to control bleeding. The procedure commonly takes under an hour to a couple of hours depending on extent, and most people go home the same day or after a short stay.

Preparation

Preparation includes completing the CT scan and endoscopy, addressing any dental source, reviewing medications, and stopping blood thinners only if your surgeon advises. Steroids or antibiotics are sometimes given beforehand. You must follow fasting instructions before anaesthesia.

Arrange for someone to take you home. If travelling abroad, bring copies of your imaging and records, and plan for the recovery period your team recommends before flying, since air travel is usually avoided for a short time after sinus surgery.

Benefits and Expected Goals

The goals of maxillary antrostomy are to restore drainage and ventilation of the maxillary sinus, relieve cheek pressure, nasal blockage, and discharge, reduce recurrent infections, and clear retained material such as fungal debris or cysts. It also allows topical treatments to reach the sinus more effectively.

Benefits vary by individual and by the underlying cause. Because surgery does not cure the tendency to inflammation, lasting benefit depends on ongoing medical treatment and managing any dental or allergic cause. Your surgeon can discuss realistic goals for your case.

Risks and Possible Complications

Maxillary antrostomy is generally safe, but because the sinus lies near the eye socket and tooth roots, there are risks to be aware of.

• Bleeding, occasionally needing packing or further treatment
• Infection or recurrence of sinus disease
• Scarring or re-narrowing of the enlarged opening
• Rarely, injury near the eye socket causing swelling, bruising, or vision problems
• Rarely, numbness of the cheek or upper teeth
• Recirculation of mucus if an accessory opening is present
• Risks related to general anaesthesia

Your surgeon will explain the risks specific to your anatomy and how any complication would be managed. Report vision changes, cheek or eye swelling, or heavy bleeding urgently.

Recovery, Follow-up & Aftercare

Recovery varies by patient. The nose is usually blocked with swelling and crusting for one to two weeks, and saline rinses help clear crusts and support healing. Most people return to light activities within a few days and work within one to two weeks, avoiding nose-blowing, heavy lifting, and strenuous exercise as advised.

Follow-up may include endoscopic cleaning of the nose and resuming steroid nasal sprays or rinses and allergy treatment to maintain drainage and reduce recurrence. Follow the surgical team's instructions, and if treated abroad, arrange ongoing treatment and follow-up with your ENT doctor at home before returning.

Medical Tourism Planning

If you are considering maxillary antrostomy abroad, choose a JCI- or ISO-accredited hospital with sinus (rhinology) expertise and, ideally, image guidance for complex cases. Confirm the surgeon's experience with endoscopic sinus surgery and request a written plan and cost estimate before travelling.

Plan for the in-country recovery your team recommends before flying, and arrange ongoing medical treatment and follow-up at home, since long-term control depends on continued care. Consider medical travel insurance.

Estimated Cost Factors

The cost depends on the country and hospital, surgeon and anaesthetist fees, whether other sinuses are treated at the same time, whether image guidance or balloon dilation is used, length of stay, and imaging and medications. Combined multi-sinus surgery costs more than an isolated antrostomy.

Many international destinations offer these procedures at a fraction of typical prices in higher-cost countries, but figures vary by case. Online prices are only estimates — always request a personalized written quote for your specific situation before deciding.

Choosing a Hospital or Specialist

Look for a hospital with recognised accreditation and a dedicated ENT department with rhinology expertise and endoscopic facilities. Confirm the surgeon's experience with endoscopic sinus surgery, including management of dental-related and recurrent disease.

Ask about post-operative nasal care, international patient services, and how follow-up would continue after you return home. Transparent written cost and treatment plans are signs of a quality programme.

Alternatives

Alternatives include ongoing medical treatment — steroid nasal sprays, saline rinses, and treatment of infection, allergy, and any dental cause. Balloon sinus dilation may be an option for limited disease, and treating a diseased tooth may resolve infection arising from a dental source.

Each option has different benefits and durability. Discuss them with your ENT specialist so the plan fits the cause and extent of your maxillary sinus disease.

Questions to Ask Your Doctor

• Is the maxillary sinus the main problem, or are other sinuses or a tooth involved?
• Would balloon dilation or medical treatment be reasonable alternatives for me?
• What are the specific risks in my case, including to the eye and teeth?
• How likely is my sinus disease to recur, and what will reduce that?
• What ongoing medication and follow-up will I need afterwards?
• How long should I stay in-country, and when is it safe to fly?
• What is included in the written cost estimate?