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Precision Measurements and Parametric Models of Vertebral Endplates
Published on: September 17, 2019
Thoracic and lumbar pedicle morphometry in achondroplasia
C Palani Kumar1, Hae-Ryong Song, Seok-Hyun Lee
1Department of Orthopaedic Surgery, Dr SM CSI Medical College & Hospital, Karakonam, India.
Clinical Orthopaedics and Related Research
|September 8, 2006
Summary
Pedicle anatomy in achondroplasia differs significantly from healthy individuals, impacting safe screw placement. This study quanties these differences to guide surgical decisions for spinal fusion.
Area of Science:
- Orthopedic surgery
- Spinal anatomy
- Medical imaging
Background:
- Safe pedicle screw insertion relies on understanding pedicle anatomy.
- Quantitative morphometric data for pedicles in achondroplasia patients are lacking.
Purpose of the Study:
- To quantitatively describe thoracic and lumbar pedicle morphometry in achondroplasia.
- To identify safe screw sizes and trajectories for spinal surgery in these patients.
Main Methods:
- Computed tomography (CT) scans of 302 thoracic and lumbar pedicles from 11 achondroplasia patients were analyzed.
- Key morphometric parameters including diameter, length, and angles were measured.
- Data were compared with those of healthy individuals.
Main Results:
- Achondroplasia patients exhibited smaller pedicle dimensions compared to healthy individuals.
- Abnormal anteromedial transverse angulations were noted from T11 to L2.
- Transverse diameter limited screw size at most levels, with 6mm screws feasible at L5 and 35mm or shorter screws safe between T7-L5.
Conclusions:
- Significant differences exist in thoracic and lumbar pedicle morphology between achondroplasia patients and healthy individuals.
- These morphometric variations necessitate tailored surgical approaches for safe pedicle screw fixation in achondroplasia.
- Understanding these anatomical nuances is crucial for optimizing screw selection and trajectory during spinal procedures.
