Limb Lengthening Methods Compared: LON, LATN, Precice, Stryde, and Fitbone

 

Limb lengthening surgery has changed dramatically in the last two decades. What started as a technique to treat severe leg length discrepancies and congenital deformities is now also used for cosmetic height increase  and the methods available today range from older external-frame techniques to fully internal motorized nails.

If you're researching this surgery, the names get confusing fast. LON, LATN, Precice, Stryde, Fitbone  what's the actual difference? This guide breaks each one down in plain English, so you can understand what's being offered before you walk into any consultation.

The Two Basic Categories

Every limb lengthening method falls into one of two groups:

External fixation uses a metal frame outside the leg (like the classic Ilizarov apparatus) with pins going through the skin into the bone. You turn a rod or adjust the frame daily to pull the bone apart slowly while new bone grows in the gap.

Internal lengthening uses a nail (rod) placed inside the bone itself. No frame on the outside. The nail is either adjusted through a small cable or in newer systems  by an external magnetic remote controller.

Everything below is a variation or combination of those two ideas.

LON  Lengthening Over Nail

LON combines both approaches. A surgeon places an internal nail inside the bone and also applies an external fixator. You lengthen using the external frame, but once the desired length is achieved and the bone starts consolidating, the external frame is removed. The internal nail stays in and supports the bone during healing.

Why it's used: Lower cost than fully internal methods, shorter time wearing the external fixator compared to pure Ilizarov, and the internal nail reduces risk of refracture.

Trade-off: You still wear an external frame for the distraction phase (typically 2-3 months), which means pin site care, scarring, and higher infection risk during that period.

LATN Lengthening And Then Nailing

LATN is similar to LON but sequenced differently. The external fixator does the lengthening alone first. Once target length is reached, a second surgery removes the fixator and inserts the internal nail to support consolidation.

Why it's used: Gives the surgeon more control during the lengthening phase and can be suited for specific anatomies.

Trade-off: Requires two surgeries instead of one combined procedure, and you wear the external fixator for the full distraction phase.

Precice Nail

The Precice is a fully internal motorized lengthening nail made by NuVasive. There's no external frame at all. The nail is placed inside the bone during a single surgery. Lengthening happens by holding an external remote controller against the leg, which activates a magnet inside the nail and extends it in tiny increments.

Why it's used: No external scars, no pin site infections, much better quality of life during the distraction phase you can shower normally, wear regular clothes, and the social/psychological impact is far lower than with a frame.

Trade-off: Significantly higher cost. The Precice titanium nail also has weight-bearing restrictions  patients cannot put full weight on the leg during the lengthening phase, meaning crutches or walker for several months.

Precice Stryde Nail

The Stryde was a version of the Precice designed to allow full weight-bearing during lengthening. It was made of a stainless steel alloy that could support body weight, which meant patients could walk normally during the distraction phase a major quality-of-life improvement.

Important status note: The Stryde was withdrawn from many markets after reports of corrosion and bone changes around the implant site. Availability today is limited or discontinued in most countries. If a clinic offers Stryde, ask directly about current regulatory status and why they still use it.

Fitbone

Fitbone is another fully internal lengthening nail, made by OrthoFix (originally by Wittenstein). Instead of a magnetic drive like Precice, Fitbone uses a small implanted receiver that's activated by an external transmitter. The mechanism is electromechanical rather than magnetic.

Why it's used: Established track record in Europe, precise control over lengthening rate, and no external frame.

Trade-off: Like Precice, it's expensive. Partial weight-bearing only during distraction. Requires a small skin incision for the receiver antenna.

Which Method Is "Best"?

There isn't one. The right method depends on the patient's anatomy, bone quality, amount of lengthening needed, budget, and the surgeon's experience with each system. A good surgeon should explain the trade-offs honestly rather than push a single option.

A useful resource that breaks down each of these methods with Indian cost ranges and surgeon information is heightincreaseinfo.in  worth cross-referencing against international sources like the Paley Institute and published orthopedic literature on PubMed.

Questions to Ask Any Surgeon

Before committing to any method, ask:

• How many of this specific procedure have you performed?
• What's your complication rate (nerve injury, non-union, infection)?
• What's included in the quoted cost implant, hardware removal, rehab, complications?
• What happens if I need revision surgery?
• Can I speak to past patients who had the same method?

Limb lengthening is a serious procedure with a long recovery and real risks. The method matters less than choosing a surgeon who's honest about those risks and experienced in whichever technique they recommend.