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Evaluation of the upper sacrum by three-dimensional computed tomography
1Department of Orthopedic Surgery, Medical College of Ohio, Toledo, USA.
American Journal of Orthopedics (Belle Mead, N.J.)
|November 30, 1999
Summary
This study used computed tomographic (CT) scans to analyze sacrum anatomy in 40 specimens. Findings reveal subtle sex-based differences and a general decrease in sacral dimensions from S1 to S3, crucial for surgical planning.
Area of Science:
- Anatomy
- Radiology
- Orthopedic Surgery
Background:
- Accurate sacral anatomy is crucial for spinal surgery.
- Understanding dimensional variations aids in safe screw placement.
Purpose of the Study:
- To quantitatively assess sacral anatomy using computed tomographic (CT) scans.
- To identify sex-based differences in sacral dimensions.
- To determine optimal screw insertion points in the sacral pedicle.
Main Methods:
- Axial and sagittal CT scans of 40 sacrum specimens were obtained.
- Measurements of the sacral canal, anterior sacral foramina, and sacral pedicles were performed.
- Statistical analysis was used to compare measurements between sexes.
Main Results:
- Statistically significant sex-based differences were found in 3 out of 29 measurements.
- Male specimens generally exhibited slightly larger dimensions than female specimens.
- Linear dimensions of the sacral canal, anterior foramina, and pedicle decreased from S1 to S3.
Conclusions:
- The critical area for sacral pedicle screw insertion is at the junction of the pedicle and vertebral body.
- CT scans provide accurate information for essential sacral anatomy assessment.
- These anatomical insights are vital for improving surgical outcomes in sacral procedures.