Cruciate Ligament Disease

What is Cruciate Ligament Disease?

The cranial cruciate ligament (CCL) is one of the major stabilising ligaments within the knee (stifle) joint. It helps prevent excessive forward movement and rotation of the tibia.

When the ligament becomes damaged or ruptures, the joint becomes unstable, leading to pain, inflammation, lameness, and eventually osteoarthritis.

One of the most common orthopaedic conditions in dogs
Can occur suddenly or develop gradually over time
May affect one or both hindlimbs
Often progresses to arthritis if left untreated
Commonly seen in active, overweight, middle-aged, and large breed dogs

Severities

Partial Tear

Some ligament fibres remain intact
Mild to moderate lameness
Joint remains partially stable
May progress to a complete rupture

Complete Rupture

Ligament fully torn
Significant instability within the joint
Marked lameness
Increased risk of meniscal injury
Rapid progression of arthritis

Chronic Disease

Long-standing instability
Established osteoarthritis
Muscle loss
Reduced mobility
Compensatory issues elsewhere in the body

Symptoms

Common signs may include:

Sudden hindlimb lameness
Toe-touching or non-weight-bearing lameness
Difficulty rising
Reluctance to jump
Reduced exercise tolerance
Sitting with the affected leg out to the side
Hindlimb muscle loss
Stiffness after exercise
Difficulty navigating stairs
Reduced performance in sporting dogs

Diagnosis

Diagnosis may involve:

Veterinary examination
Orthopaedic assessment
Cranial drawer test
Tibial thrust test
X-rays (radiographs)
Sedated examination
Ultrasound
Arthroscopy
Advanced imaging if required

Treatment

Treatment depends on the severity of injury, size of the dog, activity level, and presence of arthritis.

Options may include:

Physiotherapy
Hydrotherapy
Weight management
Pain relief medication
Activity modification
Conservative management
TPLO surgery
TTA surgery
Lateral suture surgery
Long-term arthritis management

Many dogs will require rehabilitation whether managed surgically or conservatively.

How Physiotherapy Helps

Physiotherapy is an essential component of both conservative management and post-operative rehabilitation for cruciate ligament disease.

Whether your dog has undergone surgery or is being managed without surgery, physiotherapy can help optimise recovery and improve long-term outcomes.

Reducing Pain & Inflammation

Following injury or surgery, pain and swelling can significantly affect movement. Physiotherapy techniques can help improve comfort and encourage more normal movement patterns.

Restoring Normal Movement

Dogs often develop compensatory gait patterns following a cruciate injury. Physiotherapy aims to restore more symmetrical weight bearing and movement..

Rebuilding Muscle Mass

One of the most common consequences of cruciate disease is muscle loss, particularly in the thigh (quadriceps and hamstrings).

Targeted strengthening exercises help rebuild lost muscle and support the healing joint.

Improving Joint Stability

Strong muscles act as dynamic stabilisers around the stifle. Rehabilitation exercises help improve stability and reduce strain on surrounding structures.

Supporting Post-Operative Recovery

Following TPLO, TTA, or lateral suture procedures, physiotherapy helps guide a safe return to activity and can improve functional outcomes.

Improving Balance & Proprioception

Elbow dysplasia can significantly impact performance dogs. Physiotherapy can help maintain comfort, strength, and function whilst supporting long-term athletic performance.

Preventing Secondary Problems

Injury and surgery can affect a dog's awareness of limb placement. Specific exercises can help improve coordination, balance, and confidence.

Benefits of physiotherapy may include:

Reduced pain and stiffness
Improved weight bearing
Increased muscle mass
Better joint stability
Improved gait quality
Faster return to function
Reduced compensatory strain
Enhanced quality of life

How Hydrotherapy Helps

Hydrotherapy is one of the most valuable rehabilitation tools available for dogs with cruciate ligament disease.

The underwater treadmill allows controlled exercise whilst reducing the forces placed through the healing joint.

Early Controlled Exercise

Hydrotherapy can often be introduced during rehabilitation to allow safe, controlled movement whilst protecting healing tissues.

Reduced Joint Loading

Water buoyancy decreases the amount of body weight transmitted through the stifle joint, allowing dogs to exercise more comfortably.

Building Muscle Strength

Water provides natural resistance which helps strengthen the hindlimbs without excessive impact.

Improving Range of Motion

The repetitive, controlled walking motion encourages improved joint mobility and flexibility.

Restoring Normal Gait

Many dogs develop altered movement patterns following injury. Hydrotherapy can help promote more symmetrical weight bearing and stride length.

Improving Fitness

Restricted exercise following injury or surgery can result in deconditioning. Hydrotherapy provides a safe method of maintaining cardiovascular fitness during recovery.

Supporting Long-Term Arthritis Management

Even after successful treatment, some degree of osteoarthritis may develop. Hydrotherapy can help manage long-term joint health and mobility

Benefits of hydrotherapy may include:

Improved muscle development
Enhanced mobility
Better weight bearing
Improved gait quality
Increased fitness
Reduced joint loading
Greater confidence during movement
Improved quality of life

Further Information

The Opposite Knee is Also at Risk

Studies suggest that many dogs will develop cruciate disease in the opposite hindlimb at some stage.

Maintaining a healthy body weight, strong musculature, and good mobility may help reduce this risk.

Weight Management is Crucial

Excess body weight significantly increases forces through the stifle joint and can contribute to disease progression and poorer outcomes.

Maintaining a healthy body condition score is one of the most effective ways to support recovery.

Surgery is Not Always the Whole Solution

Whilst surgery stabilises the joint, rehabilitation is often what helps dogs regain strength, mobility, and confidence.

Physiotherapy and hydrotherapy play an important role throughout the recovery process.

Arthritis Often Develops

Unfortunately, even with successful treatment, some degree of osteoarthritis commonly develops over time.

Ongoing management can help minimise discomfort and maintain quality of life.

Early Intervention Matters

Prompt diagnosis and rehabilitation can help reduce muscle loss, improve recovery, and support the best possible long-term outcome.

We Can Help

At Paws & Claws Veterinary Physiotherapy & Hydrotherapy Clinic, we provide tailored rehabilitation programmes for dogs with cruciate ligament disease, supporting recovery before and after surgery, improving mobility, rebuilding strength, and helping your dog return to an active and comfortable life.