Equine Temporomandibular Joint Diagnostics and Treatment

The equine temporomandibular joint (TMJ) is a complex, diarthrodial articulation comprising two synovial compartments—the discotemporal and discomandibular joints—separated by a fibrocartilaginous disc. Disorders affecting this joint, including osteoarthritis, septic arthritis, intra-articular disc pathology and traumatic injury, can impair mastication, bit acceptance and overall performance. Initial assessment combines clinical examination with conventional radiography and ultrasonography to identify bony irregularities and gross soft-tissue changes. Advanced imaging modalities such as computed tomography and magnetic resonance imaging afford high-resolution evaluation of osseous architecture and disc integrity, while arthrocentesis and contrast arthrography permit targeted sampling and visualisation of intra-articular structures. Minimally invasive arthroscopic techniques, increasingly performed under standing sedation, enable both confirmation of diagnosis and direct therapeutic intervention, including debridement and intra-articular medication delivery. Medical management centres on anti-inflammatory therapy, joint lavage and physio-therapeutic support. In more severe or refractory cases, surgical approaches—such as condylectomy with meniscectomy or selective arthrodesis—offer durable resolution of clinical signs. A multimodal strategy, integrating evolving diagnostic and therapeutic tools, underpins tailored treatment plans that aim to restore joint function, minimise downtime and preserve athletic capability in horses worldwide.

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Equine Temporomandibular Joint Diagnostics and Treatment publication trend

The graph below shows the total number of articles in equine temporomandibular joint diagnostics and treatment across all publications each year (not limited to Nature Index journals).

Technical terms

Arthrocentesis: Percutaneous aspiration of synovial fluid from a joint compartment for diagnostic or therapeutic purposes.

Arthroscopy: Minimally invasive endoscopic examination and treatment of joint interiors under sedation or general anaesthesia.

Condylectomy: Surgical excision of the mandibular condyle to remove diseased joint surfaces and alleviate pain.

Meniscectomy: Resection of a portion or entirety of the intra-articular fibrocartilaginous disc.

Contrast arthrography: Radiographic imaging technique in which contrast medium is injected into joint spaces to visualise soft tissue structures.

Discotemporal joint (DTJ) and discomandibular joint (DMJ): The upper and lower synovial compartments of the equine TMJ, respectively, separated by an intra-articular disc.

References

1. Contrast arthrography of the equine temporomandibular joint. Frontiers in Veterinary Science (2024).
2. The Equine Temporomandibular Joint: Comparisons Between Standard and Needle Arthroscopic Examination of Cadaver Specimens and Standing Horses. Frontiers in Veterinary Science (2022).
3. Long-Term Outcome of Horses Undergoing Unilateral Mandibular Condylectomy and Meniscectomy for Temporomandibular Joint Disease. Frontiers in Veterinary Science (2022).