What is the most common symptom of odontogenic sinusitis?

March 28, 2023

Do you suspect that you may be suffering from odontogenic sinusitis? Are you looking for reliable ways to detect the condition? If so, then this blog post is for you! We'll discuss what the most reliable symptom of odontogenic sinusitis is and how to detect it.


Introduction to Odontogenic Sinusitis

Odontogenic sinusitis is an inflammatory condition that affects the paranasal sinuses, and is often caused by underlying dental pathology, trauma, or other possible causes. It is a highly prevalent, underappreciated and underdiagnosed disease that has been known for over 100 years. OS affects a significant proportion of patients with paranasal sinus infections, and its evaluation can be challenging. In this blog post, we will discuss the most reliable symptom for odontogenic sinusitis and the diagnostic criteria, possible causes, treatment options and more.


Clinical Presentation of Odontogenic Sinusitis

Odontogenic sinusitis was first described in the scientific literature back in 1943 and is characterized by malodor as its most common symptom. It is associated with maxillary sinusitis and can present itself with a variety of symptoms. Unilateral purulent rhinorrhea, facial pressure pain, nasal obstruction syndrome, purulent secretions visible on the posterior wall of the pharynx, decreased smell, postnasal drip, cheek pain, and dental pain are all common symptoms of OS. Furthermore, diagnostic criteria for OS includes having two or more of these symptoms for more than twelve weeks. Patients may also experience dental implant-related complications which may be the cause of OS. Transnasal endoscopic sinus surgery is one possible treatment option for those suffering from OS. Endoscopic nasal exam can also help in determining the severity of OS and its association with periodontal/endodontic disease. Thus, malodor is considered to be the most reliable symptom for odontogenic sinusitis.
 

Symptoms of Odontogenic Sinusitis

Patients suffering from odontogenic sinusitis typically present with unilateral symptoms, such as purulent nasal discharge, facial pain, and dental pain. Additionally, a foul odor may be present. Endoscopic nasal exams can also be used to diagnose ODS. The most common symptom of odontogenic sinusitis is unilateral purulent nasal discharge, which was found in 66.7% of cases. Other symptoms may include middle facial pain, nasal obstruction, and mucopurulent discharge. It is important to note that these symptoms are usually preceded by a cold or upper respiratory infection. Teeth with close proximity to the maxillary sinus floor also have a higher association with ODS.


Diagnostic Criteria for Odontogenic Sinusitis

So far, we have discussed the common symptoms of odontogenic sinusitis, which include nasal obstruction, purulent nasal discharge, facial pain, and dental pathology. Now, let us take a look at the diagnostic criteria for odontogenic sinusitis. Studies have shown that the most reliable symptom to diagnose odontogenic sinusitis is unilateral sinonasal symptoms lasting for more than 3 months. Nasal endoscopy has also been found to be a useful tool in diagnosing ODS since it can reveal purulent secretions in the middle meatus, which is indicative of an infectious process in the maxillary sinus. Endoscopic nasal exams can also be used to distinguish between non-odontogenic rhinosinusitis and ODS, as sinonasal symptoms are not required to diagnose ODS. Furthermore, studies have established a strong association between ODS and periodontal or endodontic disease. Therefore, it is important to consider all the diagnostic criteria when making a diagnosis of ODS in order to ensure accurate diagnosis and treatment.


Possible Causes of Odontogenic Sinusitis

Odontogenic sinusitis is an infection of the sinuses caused by the spread of bacteria from the mouth. It can be caused by a variety of dental procedures, such as periodontal or endodontic treatments, as well as by untreated periodontal or endodontic disease. Other possible causes include trauma to the teeth or jaw and congenital abnormalities. In some cases, ODS can be difficult to diagnose as the symptoms may be similar to those of other conditions. Therefore, it is important to understand and recognize the potential causes in order to make an accurate diagnosis.


Unilateral Symptoms of Odontogenic Sinusitis

Unilateral symptoms are common in odontogenic sinusitis. The most reliable symptom for ODS is unilateral foul-smelling purulent nasal drainage. Other symptoms may include unilateral nasal congestion, purulent rhinorrhea, cacosmia, postnasal drip, and facial pain or pressure, usually located around the cheek area. It is important to note that ODS can also present with non-specific symptoms such as cough, headache, and hyposmia/anosmia. It is important to consult a doctor if any of the symptoms are present for more than three months. A thorough dental examination and investigations can help to identify the cause of ODS and other associated periodontal or endodontic diseases.


Treatment Options for Odontogenic Sinusitis

The treatment for odontogenic sinusitis is based upon the severity and cause of the infection. Generally, a combination of medical treatment, dental surgery, and/or endoscopic sinus surgery is necessary for successful management. Corticosteroids, additional antibiotics, and saline rinses are often used to reduce inflammation and reduce symptoms. The source of the infection must also be eliminated in order to prevent recurrence. In some cases, this may require the removal of a foreign tooth root from the sinus. A multitude of endoscopic techniques have been used in the treatment of odontogenic disease, including maxillary antrostomy, “mega-antrostomy,” and modified Caldwell-Luc procedures. With appropriate dental treatment and endoscopic sinus surgery, successful management of ODS can be achieved with a success rate ranging from 95-100%.


Role of Endoscopic Nasal Exam in Odontogenic Sinusitis

An endoscopic nasal exam is essential for a definitive diagnosis of odontogenic sinusitis. This procedure involves looking inside the nose and sinuses with a camera. The exam helps to detect the presence of pus, edema, or polyps that may be indicative of odontogenic sinusitis. It can also help to identify any underlying periodontal or endodontic disease that may have caused the infection. Additionally, it is important to note that unilateral symptoms are often seen in ODS, which can be helpful in making a diagnosis. Ultimately, the combination of clinical presentation, endoscopic nasal exam, and imaging studies can help to ensure an accurate diagnosis and proper treatment for odontogenic sinusitis.


Association between Odontogenic Maxillary Sinusitis and Periodontal/Endodontic Disease

The association between odontogenic maxillary sinusitis and periodontal/endodontic disease is very strong. Dental-related sinusitis is usually caused by an infection originating from the teeth, which can spread to the maxillary sinus. In addition, trauma or dental surgery can also lead to OMS. The most common symptoms of OMS include facial pain or pressure, nasal congestion, purulent rhinorrhea, cacosmia, and postnasal drip. It has also been observed that unilateral symptoms are more common in cases of odontogenic maxillary sinusitis. Furthermore, endoscopic nasal exams can help diagnose the condition, which is then followed by proper dental treatment to resolve the symptoms. It is important to note that in order to prevent OMS, it is essential to maintain proper oral hygiene and have regular dental check-ups.


Odontogenic sinusitis is a common cause of maxillary sinusitis, which is often difficult to distinguish from chronic rhinosinusitis. The most reliable symptom for diagnosing odontogenic sinusitis is unilateral odorous purulent rhinorrhea, often accompanied by nasal obstruction, facial pain or pressure, purulent secretions visible in the posterior wall of the pharynx and in the middle meatus, and postnasal drip. Odontogenic sinusitis is highly associated with endodontic and periodontal diseases. A thorough examination, including CT scans and endoscopic nasal exam can help in confirming the diagnosis and provide useful information regarding the best treatment option. The presence of odontogenic sinusitis should be considered in all cases of maxillary sinusitis.


If you're considering these options for treating sinusitis, see a qualified physician who can recommend the right treatment for you. Dr. Thomas Higgins, MD, MSPH, MBA is an experienced rhinologist dedicated to providing sinusitis relief through experience and personalized treatment in Louisville, KY, and Jeffersonville, IN.


FAQs about Odontogenic Sinusitis

  • What is odontogenic sinusitis?

    Odontogenic sinusitis is an inflammation of the sinus that results from dental issues, such as an infection of the teeth or gums, or after dental procedures. The maxillary sinuses, located above the upper teeth, are most commonly affected. This condition typically requires management of the underlying dental problem for successful treatment.

  • How often is sinusitis odontogenic?

    Odontogenic sinusitis accounts for approximately 25-40% of all cases of maxillary sinusitis. However, this percentage can vary based on different studies and patient populations. It's important for clinicians to consider dental causes when evaluating cases of chronic maxillary sinusitis, especially when the sinusitis is unilateral and persistent despite medical therapy.

  • Can dental work cause sinus problems?

    Yes, dental work can sometimes lead to sinus problems. This is particularly true for procedures involving the upper back teeth, which are close to the sinus cavities. If an infection develops after a dental procedure or if a tooth root goes into the sinus cavity, it can result in a sinus infection or sinusitis. If you are experiencing sinus problems after dental work, you should see your dentist or an otolaryngologist to evaluate for odontogenic sinusitis.

close-up-photo-of-a-sinus-doctor-examining-nasal-cavity-of-the-patient
November 28, 2025
Suffering from nasal polyps? Dr. Higgins, a board-certified ENT specialist in Louisville & Jeffersonville, offers expert evaluation, treatment, and endoscopic sinus surgery for lasting relief.
A young woman with a runny nose blows her nose into a tissue
November 14, 2025
Constantly dealing with a runny nose? Discover the real reasons behind your nasal drainage—from allergies to colds—and learn effective remedies and when to see a specialist. Get expert care from Dr. Higgins in Louisville, Kentucky; & Southern Indiana.
child-with-rhinitis-get-yellow-snot
October 27, 2025
Concerned about sudden yellow discharge? Get expert insight from Dr. Higgins, a leading sinus specialist in Kentucky and Indiana. Learn the signs of a sinus infection and effective home treatments.
Septal Swell Body treatment
September 30, 2025
Struggling with constant nasal congestion that sprays can't fix? You may have septal swell body hypertrophy. Learn the symptoms of this hidden condition and the minimally invasive procedure that can provide long-term relief in about a week.
Close-up of a man blowing his nose into a white tissue
September 26, 2025
Feeling water in your nose when you bend over? It could be allergies, a sinus issue, or a rare CSF leak. Learn the causes, symptoms, and when to see an ENT specialist for treatment.
By Thomas Higgins September 21, 2025
If you’ve dealt with a dry, irritated nose, you know it’s a terrible nuisance, disrupting sleep, exercise, and work. Learn more about Narisure Dry Nose Relief, a nasal oil with rose geranium, sesame, and vitamin E that's helping people around the world.
chronic sinusitis treatment
September 1, 2025
Discover effective chronic sinusitis treatment options, from medications to natural remedies. We'll guide you through proven solutions to help you breathe easier and find relief.
a woman struggling with sinusitis holding her nose
August 19, 2025
Struggling with chronic sinusitis? Balloon sinuplasty offers a minimally invasive option—but is it right for you? We debunk common myths, compare it to endoscopic surgery, and help you find lasting relief.
sinus infection treatment
August 18, 2025
Looking for effective sinus infection treatment? Discover proven remedies, from over-the-counter medications to natural solutions, and learn when to seek medical help for sinusitis relief.
A teenage boy having a nose bleed .
July 29, 2025
Frequent nosebleeds in teens? Juvenile angiofibroma (JNA), a benign but troublesome nasal growth, could be the cause. Learn the symptoms, risks, and minimally invasive treatment options to stop recurring nosebleeds and protect your child’s health.