The PRECICE Method: A Scientific and Modern Approach to Limb Lengthening (2025 Updated Guide)

Abstract

The PRECICE system is one of the most advanced internal limb lengthening technologies available today. Its motorized intramedullary nail, controlled magnetically from outside the body, allows for precise, painless, and highly predictable bone distraction. This article explains the scientific basis of the PRECICE method, its clinical advantages, risks, process steps, and comparisons with other limb lengthening techniques such as LON and Fitbone.

What Is the PRECICE Method?

The PRECICE method uses a magnetically driven internal nail placed inside the bone. Unlike traditional external fixators, lengthening is performed entirely inside the body with a handheld external remote controller (ERC).

The system was developed by NuVasive Specialized Orthopedics and has undergone multiple improvements (PRECICE 1.0, 2.0, PRECICE STRYDE*).
(*Note: STRYDE nails are currently under regulatory review in some countries.)

Scientific Basis of the PRECICE System

1. Magnetically Controlled Distraction

The intramedullary nail contains:

• A gearbox mechanism
• A magnetically driven motor
• Titanium alloy housing for biocompatibility

The external remote controller activates the internal magnet, producing controlled rotations that elongate the nail at precise increments (typically 0.33 mm × 3 per day = 1 mm/day).

2. Distraction Osteogenesis

Like all modern limb lengthening techniques, PRECICE relies on:

• A bone cut called osteotomy
• Gradual separation of bone ends
• Formation of new, healthy bone in the gap
• Regeneration of surrounding soft tissue (muscle, nerves, vessels)

PRECICE improves this process by providing smooth, controlled distraction with minimal mechanical irritation.

3. Stable Internal Fixation

Because the system is fully internal:

• Joint stiffness is reduced
• Pin-site infections are eliminated
• Patients experience significantly lower discomfort
• Mobility during daily life is easier

How the PRECICE Procedure Works

Step 1 — Osteotomy & Nail Placement

A small incision is made to insert the motorized nail inside the femur or tibia.

Step 2 — Latency Period

3–7 days of rest before distraction begins.

Step 3 — Daily Lengthening

Using the ERC device:

• Patients perform lengthening at home
• Usually 0.75–1 mm per day, depending on doctor’s plan

Step 4 — Consolidation Phase

After reaching the target length, the new bone begins to harden.

Step 5 — Nail Removal (Optional)

Once the bone is fully healed, the nail can be removed.

Advantages of the PRECICE Method (Based on Clinical Literature)

1. Maximum Comfort

PRECICE is widely regarded as the most comfortable limb lengthening system because:

• No external fixator is used
• Minimal pain during lengthening
• High patient mobility

2. High Precision

The magnetic motor allows:

• 0.01 mm-level accuracy
• Predictable distraction rates
• Consistent bone formation

3. Lower Complication Rates

Scientific studies report:

• Very low infection risk
• Lower joint stiffness
• Stable bone alignment
• Reduced soft-tissue damage

4. Faster Return to Daily Life

Patients can:

• Wear regular clothing
• Sleep comfortably
• Travel more easily
• Avoid scars from external pins

Disadvantages & Risks of the PRECICE Method

1. Higher Cost

PRECICE is one of the most expensive limb lengthening technologies, limiting accessibility in some regions.

2. Weight-Bearing Restrictions

Classic PRECICE nails have limited load-bearing capacity, requiring assistive devices (walker/crutches) during the early phases.
(Note: STRYDE nails allowed full weight-bearing but were suspended in some countries for safety review.)

3. Mechanical Issues

Rare but possible complications include:

• Nail jamming
• Motor slowdown
• Over- or under-distraction

4. Need for Removal Surgery

Although small, a second surgery may be required to remove the nail.

PRECICE vs. Other Limb Lengthening Techniques

PRECICE vs LON

PRECICE vs Fitbone

Who Is a Good Candidate for PRECICE?

PRECICE is ideal for:

• Adults aged 18–45
• Individuals seeking maximum comfort
• Patients prioritizing aesthetics and minimal scarring
• Those able to manage the higher cost
• Patients without severe bone deformities

Conclusion

The PRECICE limb lengthening system represents one of the most advanced and patient-friendly solutions in modern orthopedics. With its magnetic precision, reduced pain levels, and excellent cosmetic results, PRECICE continues to be a preferred choice for individuals seeking a safe, predictable, and comfortable limb-lengthening experience.