In reading this blog, you’ve probably come familiar with the 3 main types of surgeries used to treat a torn or ruptured cranial cruciate ligament in a dogs stifle joint. The problem with these 3 main types of surgeries is that they are fairly invasive, large incisions, bone cutting, etc. This may soon be a thing of the past with some of the advancements in medicine as vets and doctors are now using techniques from human surgeries. This new surgical method, called Tightrope CCL Surgery is far less invasive in that it is performed through small incisions and small holes drilled in the bone. A recent University of Missouri press release details this new procedure.

Technique Used in Human Ankle Injuries Modified to Treat Dogs’ Knees

MU veterinary clinician-scientist develops a minimally invasive method to treat torn ligaments

June 16, 2008

COLUMBIA, Mo. – A common sports injury in human knees is even more common in dogs. Each year, more than one million dogs suffer from cranial cruciate ligament (CCL) deficiency, which is comparable to the anterior cruciate ligament (ACL) injury in humans. The common method of treatment by many veterinary surgeons involves cutting the tibia bone to stabilize the CCL-deficient knee in these dogs. Now, a new minimally invasive technique with less severe complications than previous methods has been developed by a University of Missouri College of Veterinary Medicine researcher.

Unlike humans, CCL injuries in dogs typically do not occur because of a single trauma to the knee but are the result of a degenerative process that leads to early and progressive arthritis. For this reason, and the unique biomechanics of the canine knee, techniques used to repair the injury in humans do not work well for dogs.  The new technique, known as Tightrope CCL, is modified from a technique used in human ankles and allows placement of a device that stabilizes the CCL-deficient knee through bone tunnels drilled using very small incisions. MU veterinarian James Cook worked with Arthrex Inc. from Naples, Fla., to develop and test the Tightrope device for dogs.

“Other current techniques require major surgery that involve cutting the bone, which can potentially lead to severe complications, such as fracture, implant failure and damage to the joint,” said Cook, professor of veterinary medicine and surgery and the William C. Allen Endowed  Professor for Orthopedic Research. “This new technique is minimally invasive, relatively easy to perform and cost effective compared to other techniques. The dogs in the preliminary trial study experienced fewer and less severe complications with outcomes that were equal to or better than those seen with the bone-cutting technique.”

Cruciate ligament tears are five times more common in dogs than humans and cost U.S. pet-owners more than $1.3 billion each year. The new technique is not for every dog. Because surgeons must be able to drill tunnels in the bone, dogs must weigh at least 40 pounds for the Tightrope CCL method to be feasible.  In addition, dogs that cannot follow a physical rehabilitation protocol after surgery and dogs with limb deformities are not candidates for this technique. The 10- to 12-week rehabilitation period is very important for any surgical technique for CCL deficiency in order to optimize successful return to pain-free function and reduce complications, Cook said.

“The times the Tightrope CCL technique has failed are when owners did not give their dogs the full rehabilitation period and let their dogs run, play or traumatize the joint before the knees were ready,” Cook said. “A successful operation is dependent on postoperative care so that the dog can heal well and build muscle for long term function. The Tightrope CCL technique is designed to allow this to happen with less surgery and less risk of a major problem arising, and so far, it has been successful.”

The original article can be viewed here.

If any of you readers have had any experience with tightrope surgery, we’d love to hear about it in the comments. It’s still a relatively new procedure, so there really isn’t too much information available on it yet, and there seem to be even fewer stories from our readers (unfortunately). As I learn and hear more from our users, I’ll add new posts and updates about the applications of tightrope surgery, the costs of tightrope surgery and the recovery and rehab procedure involved with tightrope surgeries.

Related Posts

• Surgical Options for Torn/Ruptured Cranial Cruciate Ligament (Cranial Crucial Ligament)
• Diagnosing a Torn/Ruptured Cranial Cruciate Ligament in Dogs
• Cost of TTA Surgery for Cranial Cruciate Ligament – Cost of Knee Surgery for Dogs

When it comes to caring for our pets, we all want the best possible option, however, most veterinarians will have a single method that they prefer to perform, thus leaving you to find another vet if you do not agree with having a specific CCL surgery. Prior to committing your dog to a surgery, you’re going to want to find out what option your veterinarian will perform, the recovery time, what percent of normal activity level will the dog return to when fully recovered, etc. Of all the surgery options, I’d say that any would be better than going without the surgery (see my post on my friend who did not get the surgery for his dog), but in the end, the choice is going to be up to you – the dog owner. Without the surgery, your dog will have an unstable stifle (knee) joint, and will probably show lameness terminally.

Cranial Cruciate Ligament (CCL) Surgery Options

• Traditional Repair – Lateral Fabellar Technique
  This technique is typically recommended for smaller dogs (we went with this option on our 60lb pit bull). With this technique, a monofilament nylon cord of about 80-100lb tensile strength is passed from the lateral fabella to the tibial crest, in what was explained to me as a figure 8 pattern, basically wrapping the knee joint to eliminate and prevent joint instability (drawer movement). Scar tissue will, over time, develop around the joint, which will further stabilize the joint, but will also begin to restrict range of motion.
• Tibial Plateau Leveling Osteotomy (TPLO)
  The TPLO CCL repair technique is generally recommended for larger breeds of dogs, as well as active dogs, such as agility dogs. This technique is also thought to cause less degenerative arthritis around the stifle joing. Key things to note about the TPLO surgery are a quicker recovery time, better range of motion, less arthritis and a return to athletic (working) activity levels. TPLO surgery involves cutting the bone and slightly rotating it before re-attaching it with a plate. By rotating the top of the bone, less pressure is put on the joint.
• Tibial Tuberosity Advancement (TTA)
  This is a new, less invasive option to the TPLO surgery, but will not be an option for all dogs. Since this surgical option is less invasive, it allows for a quicker recovery time. TTA also puts a cut in the tibial bone, however it shaves off the front of the bone and extends it with a spacer. Also like the TPLO surgery, the TTA option depends on the angle of the stifle joint and is not recommended for dogs with a steep angle in the stifle.
• Tightrope Surgery (Tight Rope Surgery) (Updated June, 2009)
  Tightrope surgery is a very new procedure that is based on a similar procedure performed in human ankles. It is far less invasive and is performed through small incisions in the skin, and woven through small holes drilled in the bones of the stifle joint. Tightrope surgery is an arthroscopic procedure and thus far seems to have very positive results.

As you can probably tell, each option has advantages and disadvantages, and all options should be discussed with your veterinarian after x-rays are taken of your dogs knee joint.

Related Posts

• Cruciate Ligament in Dogs, Canine Cranial Cruciate Ligament (Crucial)
• Diagnosis – How We Determined Our Dog Had A Torn/Ruptured Cranial Cruciate Ligament (CCL)
• Diagnosing a Torn/Ruptured Cranial Cruciate Ligament in Dogs