Partial Rupture of Cranial Cruciate Ligament (CCL) in Dogs

A partial cranial cruciate ligament (CCL) tear is a common yet frequently overlooked cause of knee (stifle) lameness in dogs. While the ligament remains partially intact, it is still functionally compromised, leading to joint instability, pain, and an increased risk of arthritis. These injuries can be challenging to diagnose, as symptoms may mimic hip dysplasia or other orthopedic conditions.

At Canton Animal Hospital, we specialize in the early detection and treatment of partial CCL tears, ensuring your pet receives the best possible care before the injury worsens. Early intervention with advanced surgical techniques like TPLO or TTA can prevent a complete rupture and long-term joint damage.

Causes & Risk Factors

• Common in young, large-breed dogs – Labrador Retrievers & Rottweilers are especially prone to partial CCL tears between 6 to 24 months of age.

• Often bilateral – Many cases involve both knees, sometimes mimicking hip dysplasia.

• Degenerative changes occur over time – Arthritis develops more slowly than in complete ruptures since the meniscus is often spared.

• Two parts of the CCL – Partial tears may affect either:

• Craniomedial Band (CrMB) – Taut in both flexion and extension.

• Caudolateral Band (CdLB) – Taut only in extension.