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Anatomic variability of 120 L5 spondylolytic defects
Michael R Chen1, Timothy A Moore2, Daniel R Cooperman3
1Department of Orthopaedic Surgery, Mercy Health Physicians, Fairfield, Ohio, United States.
Global Spine Journal
|January 18, 2014
Summary
Spondylolytic defects at L5 were found in 3.87% of adult osteologic specimens. The varied anatomical location of these pars defects may influence L5 nerve root compression and radiculopathy development.
Area of Science:
- Orthopedics
- Anatomy
- Radiology
Background:
- Spondylolytic defects, particularly at the L5 vertebra, are a common cause of low back pain.
- Understanding the precise anatomical location of these defects is crucial for diagnosing and managing associated nerve root compression.
Purpose of the Study:
- To characterize and determine the prevalence of spondylolytic defects in an adult osteologic collection.
- To analyze the anatomical location of L5 isthmic spondylolytic defects in relation to surrounding vertebral structures.
Main Methods:
- Examination of lumbar vertebrae from the Hamann-Todd Osteological Collection.
- Digital image analysis of L5 isthmic spondylolytic defects, measuring pars defect distance.
- Assessment of defect location relative to the pedicle and vertebral end plate.
Main Results:
- Spondylolytic defects were identified in 3.87% of the sample.
- Significant variability in the sagittal plane location of pars defects was observed.
- Mean distances from the pedicle and inferior vertebral end plate were calculated for different defect types.
Conclusions:
- The prevalence of L5 spondylolytic defects in this osteologic sample is 3.87%.
- Variability in the anatomical location of pars defects is significant.
- Classification of defect location may aid in identifying patients suitable for fusion without decompression.
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