Repair of Oromaxillary Fistula

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Repair of Oromaxillary Fistula

Surgery Overview

An oromaxillary fistula is an abnormal passageway between one of the sinuses on either side of your nose (maxillary sinuses) and the roof of your mouth. It may develop as a birth defect (associated with a cleft palate), as a complication of removing a tooth, or from infection or trauma. Sometimes the roots of a tooth are so close to the bone under a maxillary sinus that the bone is damaged when the tooth is removed. This can open a passage between the mouth and sinus.

Before surgery, you may have an imaging test, such as a computed tomography (CT) scan, to help the doctor plan your surgery.

A surgeon may choose one of several techniques to close the fistula. One of the most common methods is called flap advancement. It involves cutting a U-shaped flap of skin in the side or roof of the mouth (sometimes both) and stretching the flap over the fistula. Sometimes a surgeon will place a piece of medical-grade foil over the opening and then stitch the skin flap over the foil.

You probably will have general anesthesia, which means you will be unconscious during the operation.

What to Expect After Surgery

Your doctor will prescribe antibiotics to prevent infection and a decongestant to keep the sinuses clear. You probably will take these medicines for a week to 10 days.

You will be given a list of precautions to follow to avoid changes in pressure between the mouth and nasal passages. Be sure to keep your mouth open when you sneeze. And don't smoke, blow your nose, or suck on items such as straws, hard candy, or ice.

Why It Is Done

This surgery is done to close a fistula between a maxillary sinus and the mouth. A fistula can cause chronic inflammation or infection of the sinus (sinusitis).

How Well It Works

Most people who have this surgery recover with no problems.


Infection is the main risk of this surgery. You should call your doctor if you have:

  • Increasing pain.
  • Bleeding.
  • A headache.
  • Pus.
  • A fever of 38.5°C (101°F) or higher.

What to Think About

In some cases, a very small fistula may be treated without surgery. A dentist or oral surgeon may apply gauze or another product over a blood clot that forms in the hole left by the extracted tooth. The gauze stays in place for a few days to help the wound heal.

Other Places To Get Help


American Rhinologic Society
P.O. Box 495
Warwick, NY 10990-0495
Phone: (845) 988-1631
Fax: (845) 986-1527
Web Address:

The American Rhinologic Society is an organization for doctors who treat people with diseases of the nose and sinuses. Patients and other interested individuals can use this Web site to find information about diseases of the sinuses and nose. Doctors and other health professionals can use this Web site to learn about all ARS activities, including scientific meetings and abstracts.

American Academy of Otolaryngology—Head and Neck Surgery (AAO-HNS)
1650 Diagonal Road
Alexandria, VA  22314-2857
Phone: (703) 836-4444
Web Address:

The American Academy of Otolaryngology—Head and Neck Surgery (AAO-HNS) is the world's largest organization of physicians dedicated to the care of ear, nose, and throat (ENT) disorders. Its Web site includes information for the general public on ENT disorders.

Canadian Society of Otolaryngology Head and Neck Surgery
P.O. Box 221 Millford Crescent
Elora, ON  N0B 1S0
Phone: 1-800-655-9533
(519) 846-0630
Fax: (519) 846-9529
Web Address:

The Canadian Society of Otolaryngology Head and Neck Surgery provides information for health professionals and can help you locate a doctor in your area.

Related Information


Other Works Consulted

  • Tucker MR, Schow SR (2008). Odontogenic diseases of the maxillary sinus. In JR Hupp et al., eds., Contemporary Oral and Maxillofacial Surgery, 5th ed., pp. 383–395. St. Louis, MO: Mosby Elsevier.


By Healthwise Staff
Primary Medical Reviewer Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer Donald R. Mintz, MD - Otolaryngology
Last Revised February 26, 2010

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.