Orthofix has commercially launched its Fitbone trochanteric lengthening system in the U.S., marking expansion of the Fitbone internal limb lengthening portfolio. This introduces a trochanteric option to support adult and pediatric patients, as well as broaden clinical possibilities in modern limb reconstruction.

The system provides a fully implantable option for femoral lengthening that supports a minimally invasive, bone-conserving approach. According to Orthofix is has the smallest proximal diameter available and is an important advancement to treat pediatric and small-stature patients (aged 12-21) who need a safer entry point through the greater trochanter.

Smaller diameter options support pediatric and small stature patients, and extended lengthening ranges broaden treatment possibilities. The system has instrumentation designed for limb alignment and soft tissue protection, with trial nails that help safe trajectory assessment and blocking screw placement.

Thanks to an antegrade approach through the greater trochanter, the entry point aligns well with the anatomical requirements of smaller femoral canals. This is necessary for younger or small stature people.

The trochanteric option complements Orthofix’s Fitbone TAA femoral and tibial nails, as well as the recently FDA-cleared Fitbone transport and lengthening system. THe latter treats bone defects related to trauma, infection, or tumor-related conditions.

“The Fitbone Trochanteric Lengthening System retains the core electromagnetic technology that has delivered consistent clinical reliability for more than 25 years,” Orthofix said in a blog post. “Key advantages include direct power delivery to the nail, consistent distraction force, energy transmission unaffected by patient size or soft‑tissue thickness, lengthening sessions completed in approximately 90 seconds, a compact use control set with no magnets, and no special alignment requirements. These performance characteristics help create a predictable, controlled lengthening process—an essential component of successful distraction osteogenesis.”