Cruciate Ligament Tears
Understanding Your Dog's Diagnosis & Options
If your dog has suddenly started limping or holding their back leg up, they may have torn their Cranial Cruciate Ligament (CCL). This is the exact same injury as an ACL tear in a human athlete, and it is the most common orthopaedic issue we see in dogs.
Unlike humans who usually tear this ligament through sudden sports trauma, dogs often suffer from a slow, degenerative weakening of the ligament over time. Eventually, even a normal activity like jumping off the couch can cause the frayed ligament to completely snap. Once the ligament tears, the knee joint becomes incredibly unstable, causing pain, inflammation, and rapid development of arthritis.
How Do We Fix It?
Because dogs stand on their toes with their knees permanently bent, the forces on their knees are much higher than ours. For this reason, simply trying to sew the torn ligament back together does not work. Instead, we have to look at other surgical options. You will likely see these three main procedures discussed online:
1. The Gold Standard: TPLO
Tibial Plateau Leveling Osteotomy
Instead of using a piece of string to replace the ligament, the TPLO completely changes the mechanics of the knee. By making a precise, curved cut in the shin bone and rotating the top surface flat, we eliminate the need for the cruciate ligament entirely. When your dog stands up, the bone is flat, and the knee is instantly stable.
Why we recommend it: Decades of data prove TPLO offers the fastest recovery, the best long-term return to running and playing, and the slowest progression of arthritis.
2. The Specialist Option: CBLO
CORA-Based Leveling Osteotomy
The CBLO is a highly advanced cousin of the TPLO. It works on the same principle (flattening the bone), but the cut is made lower down on the leg.
Why we recommend it: We reserve this specialized procedure for specific cases—mainly growing puppies (because it safely avoids their growth plates) or dogs born with extremely steep, unusual bone angles.
3. The Traditional Suture: ECR
Extra-Capsular Repair / Lateral Suture
This is the older method. The surgeon places a heavy medical-grade line (like thick fishing line) around the outside of the knee joint to physically tie the bones together, mimicking the job of the torn ligament.
Why it has limitations: Over time, the artificial line can stretch or snap, especially in heavy or active dogs. While it can be suitable for small, older, low-energy dogs, it does not provide the same robust stability as a TPLO.
What about TTA or TTO?
You may read about other alphabet-soup surgeries online, such as the TTA (Tibial Tuberosity Advancement) or TTO. While these were popular several years ago, long-term veterinary studies have shown that they carry a significantly higher risk of major complications and post-surgery cartilage tears compared to the TPLO.
Because your pet's safety and long-term comfort are our absolute priority, we stick strictly to the procedures backed by the best scientific data.