If you’re considering limb lengthening surgery, you must have reached the same decision point: what’s the difference between the LON method and the PRECICE method? Both methods are well-established and deliver reliable outcomes. So which method is better for you: LON or PRECICE? The answer depends on your priorities and medical suitability, and there are important technical differences, too. In this article, we explain the key differences between the LON method and the PRECICE method and answer the LON vs PRECICE question.
The LON method and PRECICE method differ in cost, comfort, and post-operative procedures. The most important distinction is device design: the LON method uses external fixators, while the PRECICE method uses a fully internal lengthening nail. This presence or absence of an external device directly affects comfort during the lengthening phase and also influences the degree of scarring. In addition, the technology and features involved largely determine overall cost. Therefore, while which method would be better when deciding for limb lengthening surgery depends on the personal suitability and choices; the answer to LON vs PRECICE is directly related to these fields.
LON (Lengthening Over Nail)
How it works: An internal nail is placed inside the bone and a temporary external fixator is attached to the leg. After surgery, lengthening is done at about 1 mm per day by turning the external device’s screw 1 cm in 10 days; and 7 cm in 70 days. This gradual distraction lets the body fill the gap with new bone (distraction osteogenesis) while muscles and nerves adapt safely.
External fixators & recovery: LON aims to minimize time in the external fixator. The frame is typically kept 2–3 months, then removed; but the internal nail continues to stabilize the bone during consolidation. Compared with traditional systems like Ilizarov or Holyfix, the shorter frame time can mean lower pin-site infection risk and earlier return to mobility. Pins and rods hold the bone steady, and together with the internal nail, keep lengthening controlled and precise until the planned height is reached.
PRECICE Method (Internal Magnetic Lengthening Nail)
How It Works: During limb lengthening surgery, a titanium intramedullary nail is implanted inside the bone: no external fixator. Lengthening is performed at home with an External Remote Controller (ERC) that activates a magnet inside the nail to extend it about 1 mm per day (1 cm per 10 days), as directed by your surgeon.
Lengthening with PRECICE method: The gradual, controlled distraction (distraction osteogenesis) maintains alignment and stability, typically means simpler wound care and smaller incisions, and helps soft tissues adapt. With PRECICE 2, the magnetically controlled, gradual lengthening allows precise, at-home adjustments under medical supervision; weight-bearing limits and structured physical therapy remain essential throughout lengthening and consolidation.
LON vs PRECICE
While the LON (Lengthening Over Nail) method can be more uncomfortable early on due to the temporary external fixator, it typically allows earlier and immediate weight-bearing (surgeon-dependent). Functional loading can help stimulate callus formation and support faster consolidation in many protocols. The anatomic intramedullary nails used with LON; our surgeon Assoc. Prof. Dr. Yunus ÖÇ employs an advanced, stability-focused design, work with the external fixator to maintain alignment and promote reliable bone healing, often translating to a shorter frame time and a more efficient recovery timeline. Therefore, the rate of bone healing is noticeably faster with the LON method, since the magnetic nails used in the PRECICE method are not very compatible with the bones.
A practical advantage of LON is serviceability; most mechanical or alignment issues can be corrected externally with fixator adjustments, avoiding a return to the operating room. By contrast, with PRECICE, device-related problems generally require surgical revision or nail replacement, increasing procedure time, cost, and downtime; implying further surgery and expenses.
The PRECICE 2 method utilizes internal magnetic nails which, while advanced and comfortable, have limitations in weight-bearing capacity; therefore, PRECICE nails may not be strong enough to adequately support the bones throughout the lengthening process. While potentially more uncomfortable due to the external fixators, the LON method provides considerably greater durability and strength. The external devices used in this method effectively support your bones, allow immediate weight-bearing, and significantly reduce the risk of complications related to mechanical strength.
In conclusion, both LON method and PRECICE method have their pros and cons. Therefore, the definitive choice should be made in consultation with your orthopedic surgeon after imaging review and a comprehensive clinical evaluation. Your choice should also reflect your personal priorities and preferences such as comfort tolerance, recovery timeline, scar profile, weight-bearing expectations as well.
Wanna Be Taller Team is always with you through your decision-making process. Feel free to take a look at our services that are provided in order to ensure you make the best decision for yourself.
You can always reach us via email, social media accounts, or our WhatsApp line for any questions or requests. We are happy to guide you in achieving your goals!
Phone & WhatsApp: +90 531 988 3090
Email: [email protected]
Instagram: @leg_lengthening_surgery