The formation of an oroantral communication (OAC) or fistula (OAF) is a rare complication resulting from the presence of processes in the lateral parts of the maxilla or for iatrogenic reasons. The most common causes of OAC or OAF are tooth extraction with periapical lesions.

An oroantral fistula (OAF) is an epithelialized oroantral communication (OAC), which refers to an abnormal connection between the oral cavity and the antrum. [1] The creation of an OAC is most commonly due to the extraction of a maxillary tooth (typically a maxillary first molar) which is closely related to the antral floor.

2022年10月1日 · Higher levels of evidence are required for the role of direct rhinoscopy in ODS and the accuracy of CT/CBCT in the diagnosis of ODS, of which OAF is a part, with suggestions for future research as follows:

Oroantral communication (OAC) acts as a pathological pathway for bacteria and can cause infection of the antrum, which further obstructs the healing process as it is an unnatural communication between the oral cavity and the maxillary sinus. The oroantral fistula (OAF) develops if the OAC remains open and becomes epithelialized.

Oroantral fistula (OAF), an unnatural communication between the oral cavity and maxillary sinus with epithelialization in the fistula tract, is among the most common causes of CMSDO, accounting for approximately 60% of odontogenic sinusitis cases [4,5].

2024年10月26日 · The formation of an oroantral communication (OAC) or fistula (OAF) is a rare complication. OAC is defined as the communication between the oral cavity and the maxillary sinus and occurs within 12 to 24 h of the incident. In the case of OAF, the time from the incident exceeds 12 to 24 h, resulting in the formation of a fistula.

OAF is a condition marked by abnormal communication between the oral cavity and maxillary sinus, often leading to infections, purulent discharge, nasal regurgitation and discomfort. ... Cone-beam CT (CBCT) showed an osteolytic lesion eroding the sinus floor, extending into adjacent sinuses . Both patients underwent thorough pre-operative ...

In this regard, preoperative imaging is most helpful for planning the surgical repair. 20 While orthopantomograms (OPTs) can play a scouting role in the preliminary identification of OAC/OAF, cone-beam computed tomography (CBCT) and sinus CT are the preferable modalities for evaluating the OAC/OAF bony defect size and residual surrounding bone ...

2019年5月2日 · Cone Beam Computed Tomography (CBCT) is a valuable imaging technique in oral and maxillofacial surgery (OMS) that can help direct a surgeon's approach to a variety of conditions. A 3-dimensional analysis of head and neck anatomy allows practitioners to plan appropriately, operate with confidence, an …

2021年3月19日 · 口腔上颌窦交通 (oroantral communications，OAC)是口腔与上颌窦之间发生的病理性穿通，多发生于上颌后牙拔牙术中。 发生OAC后若未进行适当处理，穿孔保持开放并上皮化，则可能引起上颌窦感染并形成口腔上颌窦瘘 (oroantral fistula, OAF)，此时可能会有液体经口进入鼻腔，口内有咸味，患侧鼻孔常有脓性分泌物，还可出现鼻塞、流涕、头痛等上颌窦炎症状，从而影响患者生活质量。 如何处理OAC取决于多种因素，包括穿孔大小、确诊时间、是否存在感 …