Repair of oromaxillary fistula, Dental Care Clinic Clapham Junction
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. These kinds of communications arise mainly after extraction of posterior maxillary teeth due to the close anatomical relationship between the root apices of the molar and premolar teeth and the sinus floor. Small OACs can be closed by suturing the gingiva over the defect. A soft tissue flap is required when suturing is not able to close the defect. The aim of this is to encourage the growth of new bone between the oral and antral cavites. Here the blood clot within the socket is protected to prevent infection of the antrum while bone formation and organization takes place. 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. OAF must be closed as it causes contamination of the maxillary sinus from the oral cavity resulting in sinusitis, in addition to communication of the oral cavity squamous epithelium with the pseudostratified columnar ciliated respiratory cells of the maxillary sinus.