DDFT tenotomy is the surgical cutting of the deep digital flexor tendon at one of two locations in the lower limb, either the pastern or the mid cannon level.

The deep digital flexor tendon attaches to P3 within the hoof. When this tendon is cut, the rotational forces pulling P3 away from the hoof wall are reduced.

Depending on the surgeon's preference, the procedure can be performed standing or with the horse under general anesthesia. My preference is to perform the surgery under general anesthesia, and at the level of mid metacarpus.

This surgical procedure is performed as a salvage procedure for horses with unmanageable, chronic laminitis of certain types. By removing the pull of the deep digital flexor tendon, the hoof and P3 can be realigned with corrective trimming or shoeing. Lameness is significantly reduced.

Following the procedure, the hoof is trimmed to align P3 with the ground. In most cases, an egg bar or extended heel shoe is placed to keep the hoof on the ground and prevent the toe from raising.

YOUR ROLE

Horses that have undergone DDFT tenotomy must be stall confined with minimal hand walking for 4-6 months, or until the newly formed ring of hoof wall has grown down 3/4 of the way to the ground.

After surgery, a horse needs to be closely monitored, especially the digital pulse and degree of lameness. Be sure you understand what to expect long-term after this procedure is performed and the kind of hoof care and maintenance that will be required.