The Equine Temporomandibular Joint: Comparisons Between Standard and Needle Arthroscopic Examination of Cadaver Specimens and Standing Horses.
Authors: Carmalt James L, Pimentel Karen L
Journal: Frontiers in veterinary science
Summary
# Editorial Summary: Temporomandibular Joint Arthroscopy in Horses Definitive diagnosis of equine temporomandibular joint osteoarthritis remains challenging, with standing arthroscopy offering a promising minimally invasive alternative to traditional imaging modalities, yet limited evidence exists comparing the diagnostic capabilities of different arthroscopic approaches. Carmalt and Pimentel examined cadaveric specimens and standing horses using both standard and needle arthroscopic techniques to evaluate visualisation quality, accessibility, and diagnostic yield of the TMJ. Needle arthroscopy—a smaller-diameter system—proved comparable to standard arthroscopy for visualising intra-articular pathology in cadavers, whilst offering superior manoeuvrability in standing horses due to reduced soft tissue trauma and improved patient tolerance. The practical implications are significant: needle arthroscopy may enable standing TMJ examination with reduced sedation requirements and recovery time, whilst maintaining diagnostic accuracy for detecting cartilage damage, osteophyte formation, and synovial changes associated with TMJ-OA. For practitioners managing performance horses with masticatory dysfunction or head carriage abnormalities, this finding expands the realistic diagnostic options available without hospitalisation, though operator experience with the technique remains a critical variable in clinical application.
Read the full abstract on PubMed
Practical Takeaways
- •Arthroscopy (both standard and needle techniques) offers a definitive diagnostic option for horses with suspected TMJ osteoarthritis that may not be clearly visible on standard imaging
- •Standing arthroscopic procedures are now viable for TMJ evaluation and treatment, potentially reducing anesthetic risk compared to recumbent approaches
- •Consider arthroscopic examination when TMJ-OA is suspected but conventional imaging is inconclusive
Key Findings
- •Needle arthroscopy and standard arthroscopy were compared for TMJ examination in cadaver specimens and standing horses
- •Both techniques enable visualization of temporomandibular joint pathology with minimally invasive approaches
- •Standing arthroscopic examination is feasible for TMJ disease diagnosis and treatment in equine patients