Morphometric Study of the Lumbar Posterior Longitudinal Ligament

Area of Science:

• Anatomy
• Biomechanics
• Spine Surgery

Background:

• The posterior longitudinal ligament (PLL) is crucial for spinal stability.
• Understanding lumbar PLL morphometry is vital for surgical procedures.
• Intervertebral disc displacement patterns can influence PLL dimensions.

Purpose of the Study:

• To investigate morphometric variations of the lumbar PLL.
• To correlate PLL dimensions with intervertebral disc displacement patterns.
• To provide detailed anatomical data for lumbar spine surgery.

Main Methods:

• Cadaveric study of 14 adult lumbar spines (L1-L5).
• Measurement of PLL width and height.
• Comparison with disc and pedicle landmarks.

Main Results:

• PLL dimensions were quantified horizontally and vertically relative to disc and pedicle.
• Specific percentages of disc width and height covered by PLL portions were determined.
• No significant right-left or male-female differences in length were observed.

Conclusions:

• The study provides essential morphometric data for the lumbar PLL.
• Findings contribute to improved knowledge of surgical anatomy related to disc displacement.
• This data aids in planning and executing safer lumbar spine surgeries.