TPLO surgery typically takes 1 to 2 hours from first incision to closure. The exact time depends on your dog’s size, the complexity of the knee injury, and the surgeon’s experience. While the surgery itself is relatively quick, the full day at the veterinary hospital and the recovery period afterward are what most dog owners need to plan around.
What Happens During the Procedure
TPLO, or tibial plateau leveling osteotomy, is a surgical fix for a torn cranial cruciate ligament in dogs. It’s the canine equivalent of an ACL tear in humans, and it’s one of the most common orthopedic surgeries performed on dogs. The surgeon cuts a curved section of the top of the shinbone (tibia), rotates it to change the angle of the knee joint, then secures it with a metal plate and screws. This eliminates the need for the torn ligament by making the joint mechanically stable on its own.
Most procedures fall in the 60 to 120 minute range for a single knee. A straightforward case in an average-sized dog with an experienced surgeon often lands closer to the shorter end. Larger dogs, dogs with steeper bone angles requiring more rotation, or cases involving additional damage inside the joint can push toward two hours.
Factors That Affect Surgery Time
Dog size matters more than most owners expect. A 15-pound terrier has smaller, more delicate bones to work with, but the overall procedure is quicker. A 120-pound Rottweiler requires larger hardware, more tissue handling, and more careful positioning. Surgeons who perform TPLO procedures regularly tend to work faster and more efficiently than those who do them occasionally, which can shave meaningful time off the operation.
If the surgeon finds additional damage inside the knee, such as a torn meniscus (the cartilage cushion between the bones), they’ll address it during the same procedure. Meniscal tears are common alongside cruciate ligament injuries and add some time but are typically handled without significantly extending the operation. Pre-existing conditions like a kneecap that slips out of place may also need correction at the same time.
Bilateral TPLO: Both Knees at Once
Some dogs tear the cruciate ligament in both knees, either simultaneously or in quick succession. When surgeons operate on both knees in a single session, the mean surgical time is about 98 minutes, with a range of 50 to 165 minutes based on a study of 127 dogs published in The Canadian Veterinary Journal. That’s not double the time of a single-knee procedure because much of the preparation and anesthesia setup only happens once.
Doing both knees at once shortens the overall recovery period and costs less than two separate surgeries. The tradeoff is longer time under anesthesia, which your veterinarian will weigh against your dog’s age and general health. Not every dog is a good candidate for the simultaneous approach.
The Full Day at the Hospital
While the surgery itself takes one to two hours, your dog will be at the veterinary hospital for most of the day or possibly overnight. Pre-surgical bloodwork and anesthesia preparation add time before the procedure starts. After surgery, your dog needs to wake up from anesthesia and be monitored for several hours. Most facilities have owners drop off in the morning and pick up in the late afternoon or the following day, depending on the practice’s protocol and how well your dog recovers from anesthesia.
X-rays are taken after the bone is repositioned to confirm the new angle is correct and the plate is properly placed. These happen while your dog is still under anesthesia, so they don’t add to the conscious recovery time.
Possible Complications
TPLO is a well-established procedure, but complications do occur. A retrospective study of 1,519 TPLO surgeries identified both major and minor issues. The most common minor complication was incision-related problems (swelling, mild infection at the skin level), accounting for about 37% of minor complications. Small fractures of the tibial crest or kneecap made up another 35%.
Major complications requiring additional surgery were less common and included joint infection, tibial fracture or implant failure, and kneecap alignment issues. Dogs with steeper initial bone angles require more rotation during surgery, which can put extra stress on the smaller bone running alongside the shinbone (the fibula) and surrounding soft tissues. These complications don’t typically extend the initial surgery time significantly, but they can mean a return to the operating room weeks later.
Recovery Timeline After Surgery
The 12 weeks following surgery demand far more patience than the procedure itself. The first two weeks are the most restrictive. Your dog will be on pain medication and anti-inflammatory drugs, confined to a small area or crate, and only going outside on a leash for bathroom breaks. Swelling and bruising around the incision are normal during this phase.
From weeks 3 through 6, most dogs start short, controlled leash walks. The bone is healing but not yet solid, so jumping, running, stairs, and slippery floors are still off limits. Your veterinarian will likely schedule a follow-up X-ray around the 6 to 8 week mark to check how the bone is fusing.
Weeks 7 through 10 bring gradually longer walks and gentle increases in activity. Many dogs look like they feel great well before the bone is fully healed, which makes this the hardest stretch for owners trying to keep an enthusiastic dog calm. By weeks 11 to 12, most dogs can return to normal activity levels, including running, jumping, and playing. The full 12-week timeline feels long, but cutting it short risks damaging the repair before the bone has solidified.
Some dogs benefit from formal physical rehabilitation, such as underwater treadmill sessions or range-of-motion exercises, which can improve outcomes and speed up functional recovery within that 12-week window.