Double-Layer Closure Technique Using Buccal and Palatal Flaps for Oroantral Fistula (OAF-DLC)

Tanta University

Status: Invitation-only

Conditions: Double Layer; Oroantral Fistula

Treatments: Procedure: Closure was performed using split-thickness buccal and palatal mucosal flaps with a subepithelial palatal connective tissue graft

Study type: Interventional

Funder types: Other

Identifiers

NCT07196566

TantaOMS-OAF-DLC2025

Details and patient eligibility

About

A prospective clinical case series was conducted involving twelve patients with oroantral fistulas ≥5 mm in diameter. Closure was performed using split-thickness buccal and palatal mucosal flaps with a subepithelial palatal connective tissue graft rotated to cove the bony defect and sutured to the buccal periosteum as the first layer, then the buccal mucosa sutured with the palatal one . Clinical evaluations were conducted at regular intervals over a 3-month postoperative period, assessing wound healing, fistula recurrence, pain, facial edema, infection, and donor site morbidity.

Full description

The proposed double-layer technique achieved high success rates in closing oroantral fistulas with minimal postoperative complications, reduced facial edema, and better preservation of vestibular depth compared to conventional techniques.

A prospective clinical case series was conducted involving twelve patients with oroantral fistulas ≥5 mm in diameter. Closure was performed using split-thickness buccal and palatal mucosal flaps with a subepithelial palatal connective tissue graft rotated to cove the bony defect and sutured to the buccal periosteum as the first layer, then the buccal mucosa sutured with the palatal one . Clinical evaluations were conducted at regular intervals over a 3-month postoperative period, assessing wound healing, fistula recurrence, pain, facial edema, infection, and donor site morbidity.

This technique demonstrated reliable, tension-free closure with excellent clinical outcomes, reduced postoperative facial edema, and preserved vestibular depth, supporting its potential as an effective and safe surgical option for managing oroantral fistulas.

The purpose of the present study was explained to the patients and informed consents were obtained according to the guidelines on human research adopted by the Research Ethics Committee, Faculty of Dentistry, Tanta University.

Enrollment: 12 estimated patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

• patients with oroantral fistula

Exclusion criteria

• patients with repeated oroantral fistula closure

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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12 participants in 1 patient group

Double-Layer Closure of Oroantral Fistula Using Buccal and palatal Split-Thickness flap

Experimental group

Description:

A prospective clinical case series was conducted involving twelve patients with oroantral fistulas ≥5 mm in diameter. Closure was performed using split-thickness buccal and palatal mucosal flaps with a subepithelial palatal connective tissue graft rotated to cove the bony defect and sutured to the buccal periosteum as the first layer, then the buccal mucosa sutured with the palatal one . Clinical evaluations were conducted at regular intervals over a 3-month postoperative period, assessing wound healing, fistula recurrence, pain, facial edema, infection, and donor site morbidity.

Treatment:

Procedure: Closure was performed using split-thickness buccal and palatal mucosal flaps with a subepithelial palatal connective tissue graft