Treating Severe Equine Sinus Infection Without Surgery
- Nick Moore DVM

- 5 days ago
- 3 min read
When we think about treating severe sinus disease in a horse, it’s easy to picture a surgical approach through the skull. But sometimes, there is another way in.
This miniature horse had significant sinusitis caused by an infected tooth. When we entered the sinus through the nasal passage with an endoscope, the extent of the infection became immediately apparent. The sinus was filled with thick, inspissated pus. It was so dense that it almost looked like cottage cheese or layers of an onion. Rather than immediately creating a surgical opening into the sinus, we were able to access the affected area transnasally while the horse remained standing.
Seeing the problem changes the approach
One of the advantages of endoscopic techniques is that they allow us to see what we're actually dealing with. In this case, the sinus was not simply mildly inflamed. It contained a tremendous amount of material that needed to be removed. We used fluid through the endoscope to break up the accumulated pus into smaller pieces and lavage the sinus.
As the material was broken down and removed, the difference was dramatic.
What had initially been a sinus cavity essentially filled with pus became a much cleaner, recognizable sinus cavity. The process took time, approximately an hour and a half, but it allowed us to treat the sinus without creating a large surgical incision.
But treating the sinus wasn't enough
The sinusitis had an underlying cause: an infected tooth. That matters.
Removing the material from the sinus can address the immediate problem, but if the source of infection remains, the problem can return. After treating the sinus, we proceeded with extraction of the affected tooth. Miniature horses can present their own challenges because access is often limited, making dental extractions more technically demanding. In this case, the extraction took approximately 23 minutes. The result was a standing procedure that addressed both the consequence and the cause of the disease.
The instruments aren't the whole story
Cases like this are a good reminder that advanced dentistry isn't simply about having the right equipment. The equipment helps. Good endoscopes, appropriate instruments, irrigation systems, imaging, and other technology can make a tremendous difference.
But none of those things replace knowing what to do, when to do it, and how to progress through the case.
A successful procedure begins long before an instrument enters the horse. It starts with diagnosis. Then comes understanding the anatomy, determining where the disease is coming from, controlling pain, choosing the appropriate nerve block and approach, and deciding how aggressively, or conservatively, to proceed.
The goal isn't simply to perform a procedure. The goal is to develop a system for solving the problem.
Skills develop through repetition and collaboration
Equine dentistry is a field where experience matters enormously. You can read about a technique. You can watch a video. You can purchase the equipment. But there is a point where learning requires putting your hands on the horse and working through the problem with someone who has done it before.
That is one of the reasons hands-on training is such an important part of our educational programs. Techniques continue to evolve. Different clinicians approach cases differently. Working alongside other veterinarians exposes you to new ways of thinking and forces you to continually evaluate your own approach. That process doesn't just improve technical skills. It improves judgment.
A different way to think about sinus disease
Not every sinus case can, or should, be treated transnasally. But selected cases can be approached in ways that are less invasive than traditional surgical approaches.
For veterinarians treating equine dental and sinus disease, understanding these options expands the number of tools available when deciding how to manage a case. And ultimately, that's what good education should do. It shouldn't simply teach you another procedure. It should give you more ways to look at a problem.
At Moore Equine Education, our goal is to help veterinarians develop the knowledge, skills, and clinical decision-making needed to confidently manage challenging equine dental cases.
Want to Learn More?
If you're a veterinary professional interested in expanding your knowledge in equine dentistry, we offer training courses on equilibration, diagnosis, endoscopic assessment, and more. You can always contact us at mooredvmeducation@gmail.com or call the office at 512-508-8141.
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