Abstract
Limb lengthening can be used to correct upper and lower limb length discrepancies. To obtain an appropriate treatment early in life prevents irreversible consequences, such as arthritis. The limb length discrepancies study is performed with a standardised leg length X-ray. This X-ray shows the compromised bone segment and what the total limb length discrepancy is. A limb length discrepancy of less than 15mm has no influence on factors such as, gait mechanics, joint range of motion, or long term joint degeneration. Over 1.5cm, several consequences appear such as: joint overload, decreased joint range of motion, muscle compensations and compensatory spine malalignment.Existing treatment includes non-surgical and surgical methods. Among the latter are internal and external fixations. External fixations have a high frequency of superficial infections, but are highly versatile, being able to correct virtually any deformity. The internal fixation (e.g. intramedullary nails) cannot correct large deformities, or make big lengthenings, but its complication rate is much lower and is much better tolerated by the patient.These treatment methods achieve very accurate results. They have an error of 3.5mm in length, which has no mechanical consequences to an extremity. The satisfaction rate is high, with around 90% achieving a significant pain relief.
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