Understanding the Anatomy of the Knee

The knee joint is formed by three primary bones:

• Femur (thigh bone)
• Tibia (shin bone)
• Patella (kneecap)

These bones work together with cartilage, ligaments, tendons, and muscles to allow bending, straightening, and weight-bearing movement.

When a fracture occurs, it may involve:

• The patella (kneecap)
• The distal femur (lower end of the thigh bone)
• The proximal tibia (upper part of the shin bone)
• The tibial plateau (the top surface of the tibia that forms part of the knee joint and supports body weight)

The tibial plateau has medial (inner) and lateral (outer) portions. Because the medial side bears a significant amount of weight, fractures in this area can significantly affect knee stability and long-term function.

Maintaining a smooth, properly aligned joint surface is essential. Even small fractures can impact long-term knee health if not treated appropriately.

Common Types of Knee Fractures

Patella (Kneecap) Fractures

A patella fracture often results from:

• A direct blow to the front of the knee
• A fall onto a bent knee
• A high-impact sports injury
• Motor vehicle accidents

Symptoms may include:

• Immediate pain and swelling
• Difficulty or inability to straighten the knee
• Visible deformity
• Bruising

In severe cases, disruption of the extensor mechanism may prevent the quadriceps muscle from straightening the leg.

Distal Femur Fractures

These fractures occur at the lower end of the thigh bone, just above the knee joint. They are more common in:

• High-energy trauma (such as car accidents or major falls)
• Older adults with osteoporosis

Distal femur fractures may involve the joint surface and often require surgical fixation to restore alignment and stability.

Tibial Plateau Fractures

A tibial plateau fracture occurs at the upper surface of the tibia where it meets the femur. These fractures often result from:

• Falls
• Sports injuries
• Motor vehicle accidents

Tibial plateau fractures vary in severity and fracture pattern. Some involve depression of the joint surface or bone loss, which may require bone grafting to support healing.

Important considerations include:

• Evaluation of soft tissue swelling before surgery
• Protection of nearby nerves and blood vessels
• Monitoring for complications such as compartment syndrome
• Management of open fractures to reduce infection risk

In severe cases, temporary stabilization with an external fixator may be necessary before definitive surgical repair.

Symptoms may include:

• Severe swelling
• Inability to bear weight
• Knee instability
• Limited range of motion

Recovery from tibial plateau fractures may take several months, and some patients may develop post-traumatic arthritis requiring additional treatment later in life.

Proximal Tibia Fractures

Fractures just below the knee joint can affect bone stability and ligament support structures. These injuries may occur from direct trauma or twisting forces and require careful orthopedic evaluation.

What Causes Knee Fractures?

Knee trauma may result from:

• Falls from height
• Direct impact injuries
• Sports collisions
• Sudden twisting forces
• Motor vehicle accidents
• Workplace injuries

In older adults, osteoporosis increases fracture risk, even after relatively minor trauma.

Symptoms of a Knee Fracture

Seek immediate medical evaluation if you experience:

• Severe knee pain
• Rapid swelling
• Inability to bear weight
• Visible deformity
• Inability to straighten or bend the knee
• Numbness or tingling in the lower leg or foot

These symptoms may indicate bone injury or possible nerve and blood vessel involvement.

How Knee Fractures Are Diagnosed

At OrthoTexas, accurate diagnosis begins with a detailed review of the patient’s medical history and mechanism of injury, followed by a thorough clinical evaluation.

Physical Examination

• Assessment of swelling and deformity
• Range-of-motion evaluation
• Neurovascular examination
• Stability testing
• Inspection for open wounds or soft tissue injury

Imaging Studies

• X-rays to identify fracture location and alignment
• CT scans for complex or joint-involving fractures
• MRI when ligament, meniscus, or cartilage injuries are suspected

Comprehensive imaging ensures associated soft tissue injuries are not overlooked.

Treatment Options for Knee Fractures

Treatment depends on:

• Fracture type and location
• Severity and displacement
• Involvement of joint surfaces
• Patient age and activity level

OrthoTexas prioritizes restoring alignment, stability, and long-term knee function.

Non-Surgical Treatment

Stable, non-displaced fractures may be treated conservatively with:

• Knee immobilization using a brace or immobilizer
• Crutches with restricted weight-bearing as directed
• Ice and elevation
• Pain management
• Close follow-up imaging

In some cases, a hinged knee brace allows controlled motion during healing.

Early, guided physical therapy helps restore strength and mobility once the fracture begins to heal.

Surgical Treatment

Surgery may be recommended when:

• The fracture is displaced
• The joint surface is disrupted
• There is loss of knee extension
• The knee is unstable
• Multiple injuries are present

Common procedures include:

• Open reduction and internal fixation (ORIF) with plates and screws
• Tension band wiring for select patella fractures
• Intramedullary fixation for specific fracture patterns
• Joint reconstruction in severe trauma cases

The goal of surgery is to realign the bones, stabilize the fracture, and restore normal joint mechanics.

Recovery After a Knee Fracture

Recovery timelines vary depending on injury severity and treatment type. Healing involves both bone and surrounding soft tissues.

Typical phases include:

• Immobilization and protection
• Gradual progression of weight-bearing
• Structured physical therapy
• Strength and range-of-motion restoration

Full recovery may take several months. Early rehabilitation is essential to reduce stiffness and restore mobility.

Potential Complications of Knee Trauma

Without proper treatment, knee fractures may lead to:

• Post-traumatic arthritis
• Instability
• Persistent pain
• Reduced range of motion

Severe injuries, open fractures, or delayed treatment increase complication risk. Early intervention and coordinated orthopedic care significantly reduce these risks.

When to See a Knee Specialist

Schedule an immediate evaluation at OrthoTexas if you experience:

• Sudden knee injury with severe pain
• Swelling after trauma
• Inability to bear weight
• Mechanical symptoms such as locking or instability
• Persistent pain after a fall or accident

Prompt care improves healing outcomes and long-term joint health.

Comprehensive Trauma Care at OrthoTexas

OrthoTexas provides advanced care for knee fractures and traumatic injuries, including:

• Advanced diagnostic imaging
• Fellowship-trained orthopedic surgeons
• Conservative and surgical treatment options
• Coordinated rehabilitation programs
• Long-term joint preservation strategies

Our team is committed to restoring knee stability, reducing pain, and helping you return to your active lifestyle safely.