Maxillary Sinusitis of Dental Origin
Maxillary Sinusitis of Dental Origin
Discover if your chronic or recurrent unilateral sinusitis is caused by a dental infection. Expert diagnosis with CBCT imaging and advanced endodontic treatment at Merchant Endodontics in Carlsbad.
Is Your Chronic Sinusitis Coming From a Tooth?
Many cases of persistent or recurring maxillary sinus infections — especially unilateral ones — originate from undetected dental problems in the upper molars. We help ENTs and patients identify and eliminate the dental source for better, lasting results.
- For Patients: Schedule a CBCT Evaluation
- For Referring Doctors: Refer a Patient or Request Consultation
Understanding Maxillary Sinusitis of Endodontic Origin (MSEO)
Many patients suffer from chronic or recurring sinus issues that don’t fully resolve with standard ENT treatments. What’s often overlooked is that some of these cases start in the teeth.
The roots of the upper premolars and molars lie very close to (or even inside) the maxillary sinus floor. When a tooth has necrotic pulp or an untreated canal, infection can spread directly into the sinus. This is known as Maxillary Sinusitis of Endodontic Origin (MSEO).
Common Signs That Suggest a Dental Cause:
- Chronic or recurrent unilateral (one-sided) sinus symptoms
- Persistent facial pressure or pain in the cheek/upper teeth area
- Foul odor or taste (halitosis)
- Symptoms that improve temporarily with antibiotics but keep returning
- History of dental work on upper back teeth
Studies show that odontogenic causes account for a significant percentage of maxillary sinusitis cases, rising even higher with unilateral presentations.
How We Accurately Determine If There Is a Dental Cause
Advanced Diagnosis with Cone Beam CT (CBCT)
Unlike traditional 2D X-rays, our in-office cone beam imaging provides detailed 3D views of the teeth, roots, and sinus floor. This allows us to:
- Identify periapical infections, untreated canals, or root fractures that standard imaging often misses
- Visualize mucosal thickening, fluid, or other sinus changes directly related to a tooth
- Differentiate dental sources from purely sinonasal issues
Clinical Evaluation Includes:
- Detailed history and symptom review
- Microscopic intraoral examination
- Assessment of previous root canal treatments
Early and accurate diagnosis prevents unnecessary sinus procedures and improves overall outcomes.
Our Advanced Treatment Approach
When a dental source is identified, we provide precise, conservative endodontic care focused on saving the natural tooth and clearing the infection.
Our Technology Includes:
- Surgical Operating Microscopes — for unmatched visualization of complex root canal anatomy
- GentleWave Procedure — an advanced system that uses acoustic energy and optimized fluids to remove bacteria and biofilm more effectively than traditional methods
Treatment Goals:
- Eliminate the source of bacterial infection
- Preserve your natural tooth
- Promote healing of the surrounding bone and sinus tissues
In most cases, thorough endodontic treatment alone leads to resolution of the sinusitis. When further sinus care is needed, we collaborate closely with your ENT.
For ENT Specialists & Referring Doctors
We value interdisciplinary care and make collaboration seamless.
How We Partner With You:
- Prompt evaluation and clear communication
- Detailed reports with CBCT findings before and after treatment
- Follow-up imaging at 3–12 months to confirm healing
- Co-management when both endodontic and ENT intervention are required
Download Resource:
2018 AAE Position Statement on Maxillary Sinusitis of Endodontic Origin
For Patients – What to Expect
You don’t have to keep dealing with recurring sinus problems. If your symptoms are one-sided or haven’t responded well to other treatments, a dental evaluation may be the missing piece.
Patient Process:
- Comfortable consultation and CBCT scan (low radiation, in-office)
- Clear explanation of findings
- Gentle, precise treatment if needed
- Follow-up to ensure both tooth and sinus are healing
Most patients are surprised at how comfortable modern root canal therapy can be with our technology.
Ready to Find the Root Cause?
For Patients: Schedule Your Evaluation Today
Phone: (760) 434-5066
Address: 3150 El Camino Real, Suite One, Carlsbad, CA 92008
For Doctors: Refer a Patient or Contact Us
