[Lumbar lordosis: radiological classification and biomechanical consequences].

Area of Science:

• Orthopedics
• Radiology
• Biomechanical analysis

Background:

• Low back pain is a prevalent condition with complex etiologies.
• Lumbar lordosis, a key spinal parameter, is implicated in low back pain.
• Standardized radiological measurements are crucial for understanding spinal biomechanics.

Purpose of the Study:

• To investigate the relationship between various radiological parameters and lumbar lordosis in patients with low back pain.
• To assess the reliability of measured radiological parameters.
• To explore the biomechanical implications of different lordosis classifications.

Main Methods:

• Lateral X-rays of the lumbar spine in erect position were analyzed in 55 patients.
• Key radiological parameters, including lordosis angle and L5 vertebral obliqueness, were measured.
• Inter- and intra-observer reliability and inter-study variations were calculated, all below 3%.

Main Results:

• A statistically significant difference was observed in the mean angle of lordosis and L5 obliqueness between patients with positive (inferior) and negative (superior) Fergusson index.
• Patients with inferior lordosis exhibited higher mean values for these parameters.
• High reliability (variation coefficients < 3%) was demonstrated for the measured parameters.

Conclusions:

• The Fergusson index reliably classifies lumbar lordosis, differentiating between inferior and superior types.
• Distinct biomechanical characteristics are associated with different lordosis classifications in low back pain patients.
• These findings may inform the biomechanical assessment and management strategies for low back pain.