Final answer:
A true Limb Length Discrepancy (LLD) capable of causing significant biomechanical problems typically requires a deficit of around 20 mm or 2 centimeters. Smaller discrepancies may still cause symptoms, while some individuals may not experience issues until the discrepancy is greater. Treatment varies from orthotics to surgery depending on severity.
Step-by-step explanation:
A true Limb Length Discrepancy (LLD) is a condition that occurs when the lengths of the legs are not the same, causing one leg to be shorter than the other. To cause significant biomechanical problems, the commonly accepted threshold for a true limb length discrepancy is typically around 20 mm or 2 centimeters, although some symptoms can occur with smaller discrepancies, and some individuals may not experience symptoms until the discrepancy is even greater.
The biomechanical issues resulting from LLD may include gait abnormalities, increased risk of injury, and other orthopedic complications. Treatment options for significant LLD can range from orthotic intervention, such as shoe lifts, to surgical procedures, depending on the severity and underlying cause of the discrepancy. Consultation with a healthcare provider is essential for an accurate diagnosis and management plan.