Levator labii superioris muscle transposition to treat oromaxillary sinus fistula in three horses.

This research describes the successful application of a surgical technique involving the transposition of a facial muscle, the levator labii superioris, in treating oromaxillary sinus fistulas in horses. The procedure led to the healing of the fistulas, improved cosmetic and functional outcomes, with minimal complications.

Objective and Methodology

• The main objective of this study was to explore the use of the transposition of a facial muscle, the levator labii superioris, as a potential treatment for oromaxillary sinus fistulas in horses.
• The authors conducted a clinical study involving three horses suffering from chronic oromaxillary sinus fistulas, a condition often associated with the loss of molariform teeth in horses.
• The surgical technique involved severing the tendinous insertion of the levator labii superioris muscle and rerouting it through the fistula. A full-thickness buccal incision was created, through which the tendon was threaded to exit the oral cavity.
• The transposed tendon was then directed subcutaneously in a ventral direction and anchored via sutures to the cheek tissues.

Results

• Following the surgery, the fistulas in all three horses healed successfully with few complications.
• The procedure also led to satisfactory cosmetic and functional results, which is crucial in maintaining the quality of life and overall health of the horses.

Conclusions

• The results of the study suggest that the transposition of the levator labii superioris is a potential viable method for treating oromaxillary sinus fistulas in horses.
• The technique demonstrated effectiveness in resolving chronic sinus fistulas, underpinning its potential utility in veterinary medicine, particularly in equine surgery.