Cruciate Ligament Injury in Dogs: Causes, Surgery and Recovery Explained

If you have a Labrador Retriever, Rottweiler, Staffordshire Bull Terrier or Golden Retriever, there is a meaningful statistical chance they will rupture their cranial cruciate ligament (CCL) at some point in their life. It is the most common orthopaedic injury in dogs globally, it is often expensive to treat, and understanding it is one of the most valuable things an owner of an at-risk breed can do.

What Is the Cruciate Ligament

The cranial cruciate ligament is one of the main stabilising structures within the canine stifle joint — the equivalent of the human knee. It prevents the tibia from sliding forward under the femur during weight bearing. In dogs, cruciate rupture is almost never a single traumatic event. It is nearly always the result of a chronic degenerative process — the ligament gradually weakens over months or years and eventually fails under normal activity. This is why certain breeds are so frequently affected: there appears to be a genetic predisposition that runs along breed lines.

Signs of Cruciate Injury

The classic presentation is acute, severe lameness in a hindlimb — the dog suddenly will not weight-bear on the affected leg. In a partial tear, the lameness may be more subtle: stiffness after rest, reluctance to jump, a slight change in gait. Over time with an untreated rupture, the joint develops significant osteoarthritis. Diagnosis is confirmed by a veterinarian through physical examination, with X-ray or MRI used to assess severity and plan treatment.

Surgical Options

Surgery is the standard of care for cruciate rupture in dogs over around 15 kg. The TPLO (Tibial Plateau Levelling Osteotomy) modifies the geometry of the joint by cutting and rotating the tibial plateau, eliminating the shearing force that makes cruciate integrity necessary. It is the most widely performed procedure and has excellent long-term outcomes. The TTA (Tibial Tuberosity Advancement) achieves a similar biomechanical result through a different approach and is favoured by some surgeons. Both procedures are available at specialist veterinary centres in most major cities worldwide.

What Does It Cost

A TPLO or TTA performed by a specialist typically costs several thousand dollars per leg depending on your location, including assessment, surgery, anaesthesia and post-operative check-ups. Physiotherapy is additional. If the opposite leg ruptures — which occurs in up to 60 percent of cases — that figure doubles. This is where pet insurance becomes extremely relevant, and why it is best arranged before any problem develops.

Recovery and Rehabilitation

Post-operative recovery involves six to twelve weeks of strictly controlled exercise — lead walks only, no jumping, no stairs, no off-leash running. Hydrotherapy using an underwater treadmill accelerates muscle rebuilding significantly and is now widely available at specialist centres. The good news is that with appropriate surgery and rehabilitation, the majority of dogs return to full or near-full function. Many owners report their dogs seem more comfortable after surgery than they were during the months of chronic degeneration leading up to the rupture.