First Walk is on Us!

✓ GPS tracked walks
✓ Activity reports
✓ On-demand walkers
Book FREE Walk

Jump to Section

What is Ulnar Ostectomy?

A dog's forelimb has two bones that stretch between the wrist and the elbow joint. They are the radius bone and the ulna bone. The ulna bone supports 20% of the animal's weight.

The upper ends of the radius and ulna bones connect with the lower end of the humerus bone, to form the dog's elbow joint. It is crucial that each bone fits correctly within the elbow joint to avoid abnormal tear on the joint, especially when a young dog's growth plates are active.

Growth plates are soft areas located at both ends of a young dog's long bones. They contain rapidly dividing cells which allow the bones to grow and become longer. The growth plates gradually close as the animal reaches puberty. 

If the growth plate of the radius bone is degraded while the dog is growing up, the pet may develop a shortened radius bone, shorter than the ulna bone, which will cause an imperfect fit on the elbow joint, generating lameness and further limb deformities.

Early corrective surgery is needed to remove a segment of the ulna bone, in relation to the radius. This procedure is called an ulnar ostectomy and can dramatically improve the lameness of the dog.

Book First Walk Free!

Ulnar Ostectomy Procedure in Dogs

An affected dog will usually show lameness on the affected forelimb. The veterinarian will initially check the elbow for signs of swelling and will observe the dog's reaction to direct palpation of the area. If needed, X-rays will be scheduled, and a CT scan may also be used to help diagnose secondary issues such as a fragmented coronoid process within the elbow joint.

For the surgery, the dog will be given a sedative and will have an IV catheter placed. Oxygen, fluids and thermal support will be required. Medical equipment will be connected to monitor the pet's vital signs. The dog will be anesthetized.

The procedure will remove a segment of the ulna bone, below the elbow joint. The length of bone that is removed will be inversely proportional to the dog's age. The younger the dog, the larger the segment of bone that needs to be removed.

A pin will be placed in the ulna bone for alignment, and a fat graft may be required. Finally, the cut ends of the ulna bone will be pulled together with a thick nylon suture which will help the elbow joint assume a better fit immediately after surgery.

Efficacy of Ulnar Ostectomy in Dogs

The overall prognosis for dogs who are seven months or younger is very positive and will have a good chance of complete recovery. Older dogs, especially those with severe leg deformities, have a more guarded prognosis. The sooner the procedure is performed, the better.

An ulnar ostectomy can correct the distortion of the radial bone, by allowing it to develop since it will no longer be restrained by a shortened, solid ulna.

Most dogs will return to controlled activity in two months and full activity in three to four  months. Athletic or very active dogs will recover full mobility in six months. However, the owner must consider that lameness might still occur after heavy activity.

An alternative treatment is to lengthen the radius bone, but this procedure is more complicated and should only be performed on dogs that have stopped growing.

Ulnar Ostectomy Recovery in Dogs

The dog will have a soft padded bandage for two to three days to prevent seroma formation and will require a bandage around the leg or the use of an Elizabethan collar to prevent licking at the incision.

Sutures or staples are removed after ten days unless tissue glue or dissolving sutures were utilized.

The veterinarian will check the bandages, splints, and amount of swelling every week. Mild swelling may develop near the incision area or the lower part of the limbs.

Activity and exercise should be restricted for at least six to eight weeks since the excessive movement may inhibit graft vascularization, which can lead to displacement and subsequent premature union of the ulna.

If the dog is difficult to control or has an exceeding amount of energy, small amounts of a tranquilizer may be prescribed to help the animal during this confinement period. If needed, the veterinarian may advise boarding the dog for the first three weeks after surgery.

Between three and four weeks after surgery, progress radiographs are taken, and once again after three to four more weeks to ensure the fracture is healing properly.

Cost of Ulnar Ostectomy in Dogs

Ulnar ostectomy is an expensive surgery. In most cases, an orthopedic surgeon will need to be consulted. The surgery can cost between $2,000 and $6,000, depending on the location, the age of the dog, the complexity of the deviation and the severity of the limb deformity.

Owners should also consider the additional costs of performing multiple radiographs and computerized tomography scans, which can add another $1,000 to $1,500 to the total cost.

Dog Ulnar Ostectomy Considerations

Unlike human patients who can use crutches, a dog isn't aware of the procedure. The pet owner must restrict the animal's activity. Failure to do so can lead to delayed healing, the need to perform further surgery, or even fracture of the bone.

Delayed healing is the most common complication. However, in a small number of cases, the bone may not be able to heal and will require an additional procedure, usually a bone graft.

Infections are not common, but they can still happen and will affect the bone's ability to heal.

Ulnar Ostectomy Prevention in Dogs

Forearm limb deformities are usually induced by a congenital defect that manifests during bone growth and bone formation. Breeds commonly affected are Bernese mountain dogs, dachshunds and Basset hounds.

Any dog that requires an ulnar ostectomy should not be used for breeding. Both parents should be retired from breeding as well.

In some patients, injury or mechanical trauma can also generate or increase the deformity. Jumping from heights and landing heavily on the forearm limbs should be avoided and young dogs should be restricted from agility exercises until they have finished growing and are skeletally mature, which is usually around 12 to 18 months of age.

An ulnar ostectomy is most effective in young dogs with a median age of 5 months and less than 25 degrees of carpal valgus. Owners should consider that a puppy's lameness will not go away on its own and in fact, should be addressed as early as possible.

Ulnar Ostectomy Questions and Advice from Veterinary Professionals

Staffordshire Bull Terrier
9 Years
Moderate condition
0 found helpful
Moderate condition

Has Symptoms


My staffie is 9 and has really bad problems he has had spinal surgery twice and now has human implants in his spine but 2 had to be taken out as his bone broke. Because of this he now puts all his weight on his front legs but has suerve arthritis in both elbows. The vet wants to cut his ulna bone and I’m worried because if it doesn’t work he will only have 1 leg to support him. I can’t decide what is best but don’t really want to put him through surgery as he has already been through so much

Add a comment to Kane's experience

Was this experience helpful?

Boxer Mix
10 Months
Serious condition
0 found helpful
Serious condition

Has Symptoms

ulnar ostectomy

My dog is 9 months and has started limping. I have taken her to the vet and gotten radiographs and CT scans. The vets have said she has FCP and severe ulnar osteotomy. They have suggested surgery to fix both, but couldn't say if she would be back to 100% after. They also recommended the amputation of that arm since she is already close to not utilizing the leg. She will only toe tap while walking. Do you think I really should consider amputation or does the surgery have good outcomes?

Add a comment to Rogue's experience

Was this experience helpful?

Tibetan Terrier
10 Months
Moderate condition
0 found helpful
Moderate condition

Has Symptoms

Limping, holding up paw sitting

Ulna Osteotomy has been recommended for my 10 month old Tibetan Terrier. Will this surgery eliminate the limp? What if surgery is not performed? She doesn't put much weight on her leg while walking or running most of the time but doesn't seem to have any pain.

Dr. Michele King, DVM
Dr. Michele King, DVM
1611 Recommendations
Without knowing the degree of deformity or joint disease, I can't comment on how successful the surgery will be, or how she will do without the surgery, unfortunately. If she doesn't put weight on the leg, that means it is painful for her to do so, and she may need to have the surgery to help her. Since your veterinarian has seen her and knows more about the details of her situation, it is very reasonable to ask more details on the surgery, what the expected outcome is, and any other options for treatment. I hope that she is okay.

Add a comment to Fiona's experience

Was this experience helpful?

mini bull dog
6 Months
Serious condition
1 found helpful
Serious condition

Has Symptoms


Are there any risks to this surgery??? Most specifically nerve damage that would affect the paw not functioning properly. Surgery was done and bandage did not seem to be done properly. It encompassed entire paw and the dog couldn't place his paw in the correct position to walk. He was bending it backwards. When I took him back to vet, after 4 days, he took off the bandage and that was it until I go to get stitchees out. He still is limping & his paw isn't right. He avoids putting it down and usually bends it back. It would make sense that it was a nerve issue. Any ideas???

Dr. Michele King, DVM
Dr. Michele King, DVM
1611 Recommendations
There are a number of risk factors with this surgery, nerve damage being one of them. Since I cannot examine Meatball or assess his neurologic function, it would be best to follow up with your veterinarian, and ask if his recovery is as expected.

Add a comment to Meatball's experience

Was this experience helpful?