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Clinical Anthropometrics and Body Composition from 3-Dimensional Optical Imaging

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Thoracic pedicle morphometry in different body height population: a three-dimensional study using reformatted

Zerui Zhuang¹, Yuchun Chen, Hui Han

¹Department of Orthopedic Surgery, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China.

|January 29, 2011

Summary

Body height significantly influences thoracic pedicle size in Chinese patients. Shorter individuals, especially those under 160 cm, have smaller pedicles, impacting surgical screw selection.

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Area of Science:

Anatomy
Radiology
Orthopedic Surgery

Background:

Thoracic pedicle morphometry varies across populations and sexes.
Previous research suggests body height may influence pedicle dimensions.
Detailed analysis of body height's impact on thoracic pedicle parameters is lacking.

Purpose of the Study:

To quantify thoracic pedicle dimensions in Chinese patients.
To analyze the relationship between body height and thoracic pedicle parameters.

Main Methods:

Three-dimensional computed tomography (CT) imaging of T1-T12 vertebrae in 126 Chinese patients.
Measurement of outer pedicle width, height, cortical thickness, length, and transverse angle.
Statistical analysis using independent t-tests and Pearson correlation.

Main Results:

Thoracic pedicle dimensions were smaller in females than males, except for transverse angles and cortical thickness.
A high percentage of narrow pedicle widths (<4.5 mm) were observed in specific thoracic segments for both sexes.
Smaller body height (<160 cm) correlated with significantly smaller pedicle widths.

Conclusions:

Body height is a primary factor in thoracic pedicle size variation across ethnicities and sexes.
Standard 4.5-mm screws may be unsuitable for many Chinese patients, particularly those under 160 cm, in the upper/mid-thoracic regions.
Routine CT evaluation is recommended for screw selection and transpedicular procedure feasibility.