UC Davis brings nano-arthroscopy to canine TMJ diagnosis
Bottom line
UC Davis has begun clinical use of nano-arthroscopy to diagnose temporomandibular joint, or TMJ, disorders in dogs, becoming what the school says is the first veterinary hospital to use the technique this way in practice. The 1.9-millimeter scope lets clinicians directly visualize the joint and collect biopsy samples, addressing a key limitation of CT and PET imaging, which can show bone and soft tissue changes but not the articular surfaces or synovium in the same way, and can't obtain tissue. UC Davis reported positive findings in all four clinical cases so far, including what clinicians described as a previously undocumented presentation of immune-mediated TMJ arthritis in dogs. The underlying methods paper, published in Frontiers in Veterinary Science on January 28, 2026, describes the approach from cadaver development through two clinical case examples in medium- to large-breed dogs. (vetmed.ucdavis.edu)
Why it matters: TMJ disease in dogs is often difficult to characterize and may be underdiagnosed, even though it can significantly affect eating, drinking, vocalizing, and overall quality of life. For veterinary professionals, the significance here is less about replacing advanced imaging and more about adding a minimally invasive way to inspect the joint directly, correlate imaging with pathology, and obtain biopsy material that can sharpen diagnosis and treatment planning. Right now, the technique appears limited to medium- to large-breed dogs, and UC Davis says it's being used diagnostically rather than therapeutically, but it may open a new referral pathway for complex oral pain, suspected inflammatory joint disease, neoplasia, or septic arthritis cases. (vetmed.ucdavis.edu)
What to watch: Whether other referral centers adopt TMJ arthroscopy training and whether published case experience expands beyond UC Davis's early series will determine how quickly this moves toward broader standard-of-care status. (vetmed.ucdavis.edu)
Key facts
- Institution
- UC Davis veterinary hospital
- Claimed first
- First veterinary hospital to clinically use nano-arthroscopy for canine TMJ disorders
- Scope size
- 1.9-millimeter device
- Use
- Directly visualize the jaw joint and collect biopsy samples
- Limitation addressed
- CT and PET cannot fully assess articular surfaces or synovium, and cannot obtain tissue
- Clinical cases
- Positive findings in all four clinical cases so far
- Notable finding
- Previously undocumented presentation of immune-mediated TMJ arthritis in dogs
- Methods paper
- Published in Frontiers in Veterinary Science on January 28, 2026
- Current scope
- Used diagnostically in medium- to large-breed dogs
UC Davis is moving nano-arthroscopy from research into clinical practice for canine TMJ disease, positioning the technique as a new diagnostic option for one of small animal medicine's harder-to-evaluate pain syndromes. In a June 8, 2026 announcement, the veterinary school said its teaching hospital is the first facility worldwide to clinically use scoping for TMJ patients, using a 1.9-millimeter device to examine the jaw joint in dogs and collect tissue samples during the same procedure. (vetmed.ucdavis.edu)
The development builds on several years of work in canine TMJ disease at UC Davis and beyond. TMJ disorders in dogs have been described as an underdiagnosed area, in part because the joint is small, anatomically complex, and difficult to assess with conventional tools alone. A 2024 study from the University of Veterinary Medicine Hannover validated an arthroscopic examination protocol for the canine TMJ and concluded that clinical trials were still needed. UC Davis then published a methods paper in Frontiers in Veterinary Science on January 28, 2026, detailing a needle arthroscopy approach developed in cadavers and translated into clinical cases. (pmc.ncbi.nlm.nih.gov)
According to UC Davis, the immediate clinical advantage is direct visualization of structures that CT and PET cannot fully assess, especially articular surfaces and synovial tissue. The scope also enables arthroscopy-guided biopsy, which can be important when clinicians are working up tumors, inflammatory disease, or other poorly defined joint pathology. In the methods paper summary, the authors said the approach offers clinically relevant diagnostic value by allowing visualization of joint structures in health and disease and by enabling biopsy collection under direct guidance. (vetmed.ucdavis.edu)
The early case experience is small but notable. UC Davis said all four clinical cases performed to date produced meaningful findings. In one case, Boaz Arzi, DVM, said the team identified immune-mediated TMJ arthritis in a clinical form they had not previously seen documented in dog joints. The published paper itself is a methods article illustrated with two clinical cases, and it emphasizes use in medium- to large-breed dogs, reflecting current size constraints of the instrumentation. UC Davis also noted that scopes suitable for smaller breed dogs or cats are not yet available for this application. (vetmed.ucdavis.edu)
The work also reflects a translational pathway from human oral surgery. UC Davis said Arzi, who became the first non-physician member of the American Society of TMJ Surgeons in 2023, connected with human surgeons already using nano-arthroscopy as a standard diagnostic approach. The veterinary team, including Stephanie Goldschmidt, DVM, and orthopedic colleagues Po-Yen Chou and Barbro Filliquist, adapted those concepts for canine patients. UC Davis has already begun training dissemination, saying it recently hosted what it described as the first TMJ arthroscopy workshop for residents and oral and maxillofacial surgery fellows from Wisconsin, Penn, and Cornell. (vetmed.ucdavis.edu)
Why it matters: For general practitioners, dentists, surgeons, and referral hospitals, this is a reminder that chronic oral pain, difficulty opening or closing the mouth, and unexplained jaw dysfunction may warrant a more targeted TMJ workup than imaging alone can provide. The bigger implication is diagnostic precision: if arthroscopy can reliably distinguish degenerative disease, septic arthritis, inflammatory disease, adhesions, or neoplasia, it could improve case selection for surgery, medical management, biopsy, or referral. That's especially relevant because prior UC Davis work on septic TMJ arthritis and other jaw disorders has already shown how consequential delayed or incomplete diagnosis can be for function and quality of life. (vetmed.ucdavis.edu)
There are still clear limits. The published evidence is early, the clinical series remains small, and the technique is currently diagnostic rather than interventional in veterinary use. Even so, UC Davis noted that human medicine already uses similar arthroscopic platforms not just for visualization, but also for operative procedures such as disc repair and correction of disc displacement. That's not a promise for veterinary adoption, but it does suggest where the field could head if instrumentation, training, and case volume develop. (vetmed.ucdavis.edu)
What to watch: Expect the next milestones to be larger clinical case series, broader training at referral centers, and evidence on how often TMJ arthroscopy changes diagnosis or treatment compared with CT-based workups alone. (vetmed.ucdavis.edu)