The effect of simulating a leg-length discrepancy on pelvic position and spinal posture

Area of Science:

• Biomechanics
• Spinal Health
• Orthopedics

Background:

• Leg-length discrepancy is a common condition.
• It can potentially affect posture and spinal alignment.
• Understanding its impact on pelvic position is crucial.

Purpose of the Study:

• To investigate the relationship between leg-length discrepancy and pelvic position.
• To assess the effect of leg-length discrepancy on spinal posture.
• To determine if simulated leg-length inequalities influence spinal sagittal deviation.

Main Methods:

• Twenty subjects (10 male, 10 female) participated.
• Artificial leg-length inequalities (0-4 cm) were created using a platform.
• Pelvic tilt, torsion, and spinal sagittal deviation were measured using the formetric 4D rasterstereographic device.

Main Results:

• Increased pelvic tilt and torsion were observed with changes in platform height.
• No significant changes in spinal posture (kyphosis, lordosis) were detected.
• Simulated leg-length discrepancies primarily affected pelvic alignment.

Conclusions:

• Leg-length discrepancy can lead to pelvic deviation and torsion.
• It does not appear to cause significant changes in spinal kyphosis or lordosis.
• The impact of leg-length discrepancy is more pronounced on pelvic position than on spinal posture.