Mandibular condylectomy and meniscectomy for the treatment of septic temporomandibular joint arthritis in a horse.
Authors: Nagy Amy Dae, Simhofer Hubert
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Mandibular Condylectomy for Septic Temporomandibular Joint Disease in Horses Septic arthritis of the equine temporomandibular joint (TMJ) presents a significant clinical challenge, particularly when accompanied by advanced degenerative changes that compromise mastication and welfare. Nagy and Simhofer documented a two-year-old Noriker filly presenting with a three-week history of painful swelling, drainage caudal to the lateral canthus, ipsilateral masseter atrophy, and severe functional impairment including 1.4 cm lateral mandibular deviation and restricted mouth opening, alongside incisor malocclusion. Computed tomography confirmed left TMJ degenerative joint disease secondary to septic infection (Streptococcus zooepidemicus); surgical management consisted of left mandibular condylectomy combined with meniscectomy and aggressive debridement of necrotic tissue. Within four months post-operatively, CT imaging revealed regeneration of a mandibular "pseudocondyle," and at both four-month and one-year follow-up evaluations, the filly demonstrated maximal mouth opening exceeding 10 cm with complete resolution of malocclusion and return to normal masticatory function—crucially, with no radiological or clinical evidence of TMJ ankylosis. For equine practitioners managing chronic septic TMJ arthritis unresponsive to conservative therapy, this case demonstrates that mandibular condylectomy with meniscectomy can facilitate functional recovery without the complication of joint fusion, though careful case selection and long-term monitoring remain essential.
Read the full abstract on PubMed
Practical Takeaways
- •Mandibular condylectomy is a viable surgical option for treating septic TMJ arthritis when conservative management has failed, with realistic expectations for return to normal function
- •Post-operative CT imaging can document healing and pseudocondyle regeneration, helping clinicians counsel owners on long-term prognosis
- •Culture-guided antibiotic therapy is important given potential antimicrobial resistance in septic joint infections
Key Findings
- •Mandibular condylectomy combined with meniscectomy and debridement successfully resolved septic TMJ arthritis in a 2-year-old filly with complete return of masticatory function
- •CT imaging at 4 months post-operatively showed regeneration of a mandibular pseudocondyle with maximal mouth opening >10 cm and normal occlusion
- •No radiologic or clinical evidence of TMJ ankylosis occurred at 1-year follow-up despite meniscal removal
- •Streptococcus zooepidemicus isolated from the joint showed intermediate resistance to penicillin and enrofloxacin