In this video you will learn what an oroantral communication is, how it is formed and how it can progress to become an oroantral fistula. All of the treatment options currently available for closure of Oroantral communication and oroantral fistula is explained in this video.
Contents:
- Buccal advancement flap
- Moczair flap
- Palatal flap
- Buccal fat pad flap
- Tongue flap
- Bone grafts for the closure of oroantral communication
- Allogenous grafts- fibrin glue and dura mater
- Xenografts
- synthetic materials
- Other techniques
Clinical assessment of an oroantral communication
An oroantral communication (OAC) is an abnormal opening between the oral cavity and maxillary sinus. Persistence and epithelialisation may produce an oroantral fistula (OAF). Assessment should document the cause, site, approximate size, time since occurrence, condition of the socket and surrounding tissue, sinus symptoms, infection and relevant imaging findings.
Management principles
- Recognize the communication early and avoid repeated traumatic probing.
- Assess for displaced roots, foreign material, sinus disease and active infection.
- Select conservative care or surgical closure according to defect size, timing, tissue quality and sinus status.
- Provide clear sinus precautions and arrange review; refer promptly when the defect is large, persistent, infected or beyond the operator’s scope.
Closure planning
Common local-flap options include buccal advancement, palatal rotational and buccal fat-pad techniques. The choice should achieve a tension-free, well-vascularised seal while preserving vestibular depth and future prosthetic needs where possible. Chronic fistula management also requires excision of the epithelial tract and control of sinus pathology.
See the related guide on ENT–dentistry referral and review controlled extraction technique.
Frequently asked questions
What is the difference between OAC and OAF?
OAC describes the communication; OAF is a persistent, epithelialised tract between the oral cavity and maxillary sinus.
Which teeth are most often associated with an OAC?
Maxillary posterior teeth are most relevant because their roots may lie close to the sinus floor.
Does every small communication require a flap?
No. Very small, fresh defects may heal with a stable clot and appropriate precautions, but size is only one factor in the decision.
When is imaging useful?
Imaging helps evaluate sinus anatomy, retained roots or foreign bodies, bony defects and sinus disease when these are suspected.
When should the dentist refer?
Referral is appropriate for large or chronic defects, sinus infection, displaced material, failed closure or when surgical management exceeds the clinician’s competence.