Realignment Surgery

Why Alignment Matters in Knee Health

Knee alignment describes how the bones of the leg sit relative to each other from the hip to the ankle. Even small variations can influence how the load is distributed during standing, walking, or exercise.

Varus and Valgus Positioning

Varus means the knees angle slightly outward, increasing load on the inner (medial) compartment. Valgus means the knees angle inward, increasing load on the outer (lateral) compartment.

These patterns may contribute to discomfort or gradual cartilage thinning, depending on your anatomy and activity demands.

Effects on Movement and Load Distribution

Alignment affects:

• Where pressure concentrates during weight-bearing
• How the menisci share load
• The tension on ligaments
• Patellofemoral tracking
• Knee biomechanics during bending and rotation

If one area is persistently overloaded, symptoms may develop or worsen over time.

How Alignment Influences Muscle Function

Alignment changes can alter the way muscles activate during gait, which may contribute to fatigue or uneven muscular load. Over time, this can influence stability, balance, and comfort when using stairs or uneven ground.

Progressive Changes in Joint Health

In some people, alignment differences can accelerate wear in a single compartment. Identifying these patterns early helps guide whether non-surgical care, realignment surgery, or ongoing monitoring may be appropriate.

When Realignment Surgery May Be Considered

Realignment surgery is not the first step in care. It is typically considered after non-surgical treatment has been explored, including physiotherapy, activity modification, strengthening, weight optimisation, and supportive strategies.

A knee specialist, such as Dr Jonathan Negus, may discuss realignment surgery if you experience:

• Alignment-related knee pain mainly affecting one side of the knee
• Early to moderate arthritis confined to a specific compartment
• Symptoms linked to malalignment of the knee despite non-surgical care
• Difficulty with daily tasks that involve weight-bearing or uneven surfaces
• Structural abnormalities on X-ray or CT that influence knee load

Assessment includes a careful review of limb alignment, ligament stability, meniscal health, and cartilage condition.

Clinical Factors That Influence Suitability

Your surgeon may consider:

• Degree of arthritis
• Bone quality
• Age and activity level
• Adjacent ligament or meniscal concerns
• Symptom pattern
• Previous injuries or surgeries

Realignment surgery is only recommended when it aligns with your goals, imaging, and overall knee function.

What Realignment Surgery Involves

Alignment correction surgery adjusts how the bones line up so that the load is shared more evenly across healthier areas of the knee. The aim is to reduce pressure on the affected side, improve function, and support more comfortable movement.

High Tibial Osteotomy (HTO)

The High Tibial Osteotomy is a type of knee osteotomy procedure usually performed for inner-side (medial) knee overload. A cut is made in the upper portion of the tibia and reshaped to shift weight toward the outer side.

Distal Femoral Osteotomy (DFO)

More commonly used for outer-side (lateral) overload. A controlled adjustment to the lower femur helps redistribute load toward the medial compartment.

Patellofemoral Realignment Procedures

When symptoms relate to the kneecap, targeted approaches may help improve patellofemoral alignment. This may include techniques that adjust the tibial tubercle positioning.

Aims of the Surgical Correction

The goals often include:

• Reducing focal stress on irritated cartilage
• Improving gait mechanics
• Balancing forces across the knee
• Supporting long-term joint preservation

Your surgeon will outline which option aligns with your anatomy, symptoms, and imaging findings.

Use of Imaging and Measurement Tools

Long-leg standing X-rays and digital planning systems help calculate the precise degree of correction needed. This ensures that the adjustment supports balanced loading while maintaining functional alignment for walking, running, and daily activity.

How Realignment Improves Knee Function

Realignment surgery focuses on biomechanical correction rather than replacing joint surfaces.

By changing how the limb bears weight, it may:

• Reduce focal pressure on worn or irritated cartilage
• Improve knee mechanics during walking and running
• Support meniscal function
• Reduce irritation in overloaded tissues
• Potentially delays the need for joint replacement in selected cases

Results vary depending on age, activity level, cartilage condition, general health, and the degree of correction required.

Effect on Long-Term Joint Preservation

Redistributing pressure can help protect remaining cartilage and support more predictable joint mechanics. This may help maintain function for longer, particularly in younger, active individuals with isolated compartment involvement.

Imaging Used to Assess Alignment

Evaluation usually includes:

• Standing X-rays to measure mechanical axis alignment
• Long-leg or hip-to-ankle imaging to assess limb angles
• CT or MRI when additional detail is required, such as cartilage quality or patellofemoral factors

This knee imaging assessment helps determine whether alignment differences may be contributing to your symptoms.

Integrating Imaging With Clinical Examination

Your surgeon interprets imaging alongside:

• Weight-bearing patterns
• Gait characteristics
• Ligament stability
• Meniscal condition
• Signs of patellofemoral irritation

This whole-joint approach helps determine whether realignment surgery may offer meaningful benefit.

Recovery and What to Expect

Recovery depends on the type of realignment procedure performed and your individual circumstances.

Rehabilitation often includes:

• Protected weight-bearing early on
• Physiotherapy to restore strength, gait, and mobility
• Gradual return to daily activity
• Monitoring healing with follow-up imaging

Healing times during osteotomy recovery may vary, and your surgeon will outline a plan tailored to your procedure and health profile.

Return to Work and Daily Tasks

Office-based work may resume earlier than roles requiring heavy lifting, prolonged standing, or climbing. Your surgeon or physiotherapist can advise when it is safe to increase activity based on your healing progress.

Long-Term Rehabilitation Goals

Rehabilitation focuses on restoring:

• Quadriceps and hip strength
• Balance and proprioception
• Gait mechanics
• Joint control during stairs and slopes

These elements support ongoing knee health following realignment.

When Realignment Is Not the Preferred Option

Realignment surgery may not be suitable when:

• Arthritis is advanced throughout the knee
• Ligament instability is severe and requires alternative treatment
• Inflammatory conditions affect multiple joint compartments
• Symptoms are not related to alignment differences

In these situations, other pathways such as non-surgical management, knee arthroscopy in selected cases, or knee replacement options may be discussed.

Alternative Approaches Depending on Findings

Options may include:

• Targeted physiotherapy
• Activity modification
• Weight optimisation strategies
• Injection therapies in selected cases
• Monitoring symptoms and imaging over time

Your surgeon will discuss which path best matches your clinical picture.

Next Steps

Understanding how your knee alignment affects symptoms can help guide whether knee alignment surgery may be considered.

If you would like support reviewing your imaging or discussing whether realignment surgery may be considered, you can arrange a consultation with Dr Jonathan Negus for a personalised assessment and clear guidance on your options.

This information is intended as a general guide only and does not replace personal medical advice. Assessment and treatment recommendations vary depending on individual circumstances. Please speak with a qualified health professional for advice specific to your condition.