Treatment of Tibial Tuberosity Avulsion Fractures in Dogs There is no specific laboratory work for this type of fracture, but blood work may be obtained prior to surgical fixation and a general anesthetic. In most cases, the fracture is the only medical problem and as such chest radiographs may not be necessary.Both knees may be radiographed to confirm the diagnosis as the displacement of the bone fragment can vary from small and subtle to dramatic. X-rays can confirm the diagnosis, and this may require sedation or even anesthesia. The patella (knee cap) may ride higher than usual, because it is no longer firmly attached to the tibia. The leg is usually painful on flexion and extension, swollen and painful on palpation over the top front portion of the tibia. In cases of more severe trauma, life threatening injuries will be investigated and addressed before assessing for problems such as lameness. Swelling around the front of the knee jointĭiagnosis of Tibial Tuberosity Avulsion Fractures in DogsĪfter a careful history and general physical examination, your veterinarian will perform an orthopedic evaluation of your pet.Sudden onset of hindleg lameness (non-weight bearing).Symptoms of Tibial Tuberosity Avulsion Fractures may include: Untreated, the knee joint and consequently the limb function on the affected leg may be poor. The fracture occurs in puppies in association with trauma, often falling from a height and landing with the knee in flexion, tearing the bone fragment from its normal position. This fracture tends to occur in younger dogs, before this area of the tibia has fully grown and fused to the rest of the bone. A fracture of the tibial tuberosity often results in an avulsion fracture, by virtue of the pull of the quadripceps muscles. This tuberosity attaches the patella (knee-cap) via a strong thick tendon of the quadriceps muscle group. The tibial tuberosity is the prominent bump on the front and top of the tibia, the shin-bone, below the knee joint. Overview of Canine Tibial Tuberosity Avulsion FracturesĪn avulsion fracture occurs when a bone breaks and a fragment of the bone is separated by the pull of an attaching muscle, tendon or ligament.
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