An interventional study of Single-step Functional Sinus Endoscopy and Transoral Surgery and Functional sinus endoscopy in Maxillary Sinusitis, sponsored by Qassim University. Recruiting at 1 site in Saudi Arabia. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-09.
Sponsored by Qassim University · Not applicable, Interventional, and Treatment
Dento- alveolar or dental structural diseases that affect the floor of the maxillary sinus can cause maxillary sinusitis which is known as odontogenic maxillary sinusitis (OMS). Many treatment protocols have been documented to treat OMS. However, There is no unanimity among clinicians on how and who should treat OMS, whether is it otolaryngologist, oral/maxillofacial surgeons, or dentist. Therefore, this study will be will be enrolled to evaluate the efficacy of the Single-step Functional Sinus endoscopy and trans-oral surgery in the management of maxillary sinusitis raised from Odontogenic origin via Department- integrated therapy.
The OMS is a well-known but understudied kind of sinusitis that necessitates a treatment regimen different from non-odontogenic sinusitis. It requires specialized attention because it differs in its pathophysiology, microbiology, diagnosis, and therapy than other forms of non-odontogenic sinusitis. There are several surgical techniques have been published to treat odontogenic maxillary sinusitis, such as transoral, transnasal endoscopic, or combined techniques. Multiple specialists are daily facing patients with maxillary sinusitis either odontogenic or non-odontogenic, including otolaryngologist, maxillofacial/oral, and dental surgeons.
The direct transoral method, which involves making a bone window in the anterolateral maxillary wall, is more familiar to maxillofacial/oral surgeons, whereas the transnasal endoscopic approach is gaining favor, particularly among otolaryngologists. There is no unanimity among clinicians on how and who should treat OMS, whether it is otolaryngologist, maxillofacial, or oral surgeon. This is one of the reasons why the results are frequently challenged as reported by others. Therefore, this study will be will be enrolled to evaluate the efficacy of the Single-step Functional Sinus endoscopy and trans-oral surgery in the management of maxillary sinusitis raised from Odontogenic origin via Department- integrated therapy.
Qassim University is the lead sponsor of 48 studies on the registry; 7 are open to participants now.
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Exclusion Criteria:
The patients who will be included in this study will be treated by functional sinus endoscopy and transoral surgery to remove the dental cause in the same visit to treat odontogenic sinusitis. The functional sinus endoscopy will be performed by the otolaryngologist, while the transoral surgery will be performed by oral and maxillofacial surgeon.
Procedure: Single-step Functional Sinus Endoscopy and Transoral Surgery
The patients who will be included in this study will be treated by functional sinus endoscopy to treat odontogenic sinusitis, and it will be performed by the otolaryngologist.
Procedure: Functional sinus endoscopy
The patients who will be included in this study will be treated by transoral surgery to treat odontogenic sinusitis, and it will be performed by by oral and maxillofacial surgeon
Procedure: Trans oral Surgery
In each patient, the operation will be carried out by an otorhinolaryngologist and a maxillofacial surgeon. The procedures of the functional sinus endoscopy (FSE) will performed as follow: Under general anesthesia, the origin of the turbinate, and the lateral nasal wall will be conducted. The following stage will be infundibulotomy, which ensures that the uncinate process will be completely removed. The ostium will be dilated with a Stammberger dilatator starting with a 0-degree endoscope then shift to a 30- or 45-degree endoscope to clean the sinus. The cavity will be irrigated after removal of the odontogenic diseases and the purulent discharge will suctioned.In addition to FSE, the maxillofacial surgeon will conduct the necessary oral surgery procedures.The needed transoral procedures will be tooth extraction, oro-antral fistula closure or cystectomy.
Also known as: FSE/OS
All patients in this group will only be treated with FSE, which will be conducted by an otolaryngologist. The FSE procedures will be carried out in the same way as the group of Single-step Functional Sinus Endoscopy and Transoral Surgery.
Also known as: FSE
Every patient in this group will only be treated with transoral surgical procedures to remove dental pathology. Oral and maxillofacial surgeons will undertake these treatments. The procedure will be either tooth extraction, oro-antral fistula closure, or cystectomy. If extraction is not needed, endodontic treatment will be performed to remove necrotic pulp. The oro-antral fistula will be closed in two layers using a buccal advanced flap and a palatal rotational flap. In the case of odontogenic cysts, the lesion will be removed by raising a trapezoidal flap.
Also known as: OS
Thickness of the sinus mucosa
On coronal and sagittal CT scans, the thickness of the sinus mucosa will be measures by using measuring tool of the CT scan machine. For each of these picture sets, six mucosal thickness measurements will be taken. Then the average of these measurements will be calculated
Time frame: Two weeks after intervention
Thickness of the sinus mucosa
On coronal and sagittal CT scans, the thickness of the sinus mucosa will be measures by using measuring tool of the CT scan machine. For each of these picture sets, six mucosal thickness measurements will be taken. Then the average of these measurements will be calculated
Time frame: One month after intervention
Thickness of the sinus mucosa
On coronal and sagittal CT scans, the thickness of the sinus mucosa will be measures by using measuring tool of the CT scan machine. For each of these picture sets, six mucosal thickness measurements will be taken. Then the average of these measurements will be calculated
Time frame: Three monthsafter intervention
Plan to share: Yes — All collected IPD
Supporting information: Study protocol, Sap, Icf
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Maxillary Sinusitis
Qassim University