Femur and tibia lengthening
Understand the bone names, distinguish treatment area from method, and ask clearer questions about a proposed lengthening plan.
By LimbAtlas editorial team
- Reading time
- 2 min
- Sources
- 2
- Last reviewed
- Updated
Key points
- The femur is the thighbone and the tibia the shinbone; the names describe the bone, not the device or method.
- On LimbAtlas, treatment area and technique are separate facts on a profile.
- The research reviewed here cannot provide a personal risk estimate or a ranking of femur against tibia.
What the bone names mean
AAOS patient information identifies the femur as the thighbone and the tibia as the shinbone. These names describe the bone involved, not the device used or the result a person can expect.
The AAOS page focuses on limb length differences in children. This guide uses its basic terminology and method descriptions; it does not transfer pediatric treatment thresholds to elective adult stature lengthening.
Treatment area and method are separate facts
On LimbAtlas, treatment area records which anatomical areas a provider's sources name. Treatment method records the technique. A profile listing both femur and tibia alongside several methods does not establish which method is offered for each bone; ask the provider to explain that connection.
AAOS describes external lengthening using a frame attached to the bone and internal lengthening using an expandable rod inside it. A bone name alone does not tell you which of these approaches is proposed.
What the research can and cannot compare
The systematic review by Frost and colleagues included femoral and tibial lengthening using two motorized nail systems. Its authors could not establish relationships between complications and individual risk factors because the available patient-level data were insufficient.
That limitation does not establish that the two bones have equal risks. It means this review cannot provide a reliable personal risk estimate or a simple ranking of femur against tibia. This guide gives no claims about which is safer, less painful or faster to recover from.
Ask about follow-up for the proposed plan
AAOS describes regular follow-up and rehabilitation, including physical therapy and home exercise, for both internal and external lengthening. It also lists stiffness in joints above and below the lengthened bone among possible complications of external lengthening.
Ask the treating team which joints it will monitor in your proposed plan and how rehabilitation is organised. LimbAtlas's provider profiles describe recorded service availability; they do not prescribe exercises or assess your suitability for surgery.
Questions to ask a provider
Use these questions to clarify a proposal with a qualified orthopaedic surgeon. If more than one bone is proposed, ask for each part of the plan to be explained separately.
Questions about treatment area6 items
- Which bone or bones are being considered in my case, and why?
- Which method and device are proposed for each bone, and what alternatives were considered?
- What examination and imaging are needed before a plan can be made?
- Which joints and movements will the team monitor during treatment?
- What follow-up, rehabilitation and weight-bearing instructions apply to my plan?
- Which risks and further procedures should we discuss for each part of the plan?
Sources
- 1.Lower Limb Length Discrepancy (external site, opens in a new tab)
OrthoInfo, American Academy of Orthopaedic Surgeonsorthoinfo.orgAccessed
Pediatric limb length discrepancy information, used for bone names, basic methods and follow-up only. Its treatment thresholds are not applied to elective adult stature lengthening.
- 2.Systematic review of complications with externally controlled motorized intramedullary bone lengthening nails (FITBONE and PRECICE) in 983 segments (external site, opens in a new tab)
Acta Orthopaedicadoi.orgPublished Accessed
Frost et al., Acta Orthopaedica 2021. Used for the limitations of subgroup comparisons, not to predict an individual's risk.
About this guide
- Status
- Published — checked against the sources listed; not clinically reviewed
- Written by
- LimbAtlas editorial team
- Published
- Last reviewed against sources
- Last updated
LimbAtlas provides educational information and does not replace advice from a qualified medical professional. This guide does not recommend a specific provider or method; discuss any medical decision with a clinician who can assess your individual situation.
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