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19 June 2013

New patterns of the growing L3 vertebra and its 3 ossification centers in human fetuses – a CT, digital, and statistical study

Michał SzpindaACDEF, Mariusz BaumgartABCDF, Anna SzpindaCD, Alina WoźniakCD, Celestyna Mila-KierzenkowskaCF

DOI: 10.12659/MSMBR.883956

Med Sci Monit Basic Res 2013; 19:169-180

Abstract

Background
This study describes reference data for L3 vertebra and its 3 ossification centers at varying gestational ages.
Material and Methods
Using CT, digital-image analysis and statistics, the growth of L3 vertebra and its 3 ossification centers in 55 spontaneously aborted human fetuses aged 17–30 weeks was examined.
Results
Neither sex nor right-left significant differences were found. The height and transverse and sagittal diameters of the L3 vertebral body increased logarithmically. Its cross-sectional area followed linearly, whereas its volume increased parabolically. The transverse and sagittal diameters of the ossification center of the L3 vertebral body varied logarithmically, but its cross-sectional area and volume grew linearly. The ossification center-to-vertebral body volume ratio gradually declined with age. The neural ossification centers increased logarithmically in length and width, and proportionately in cross-sectional area and volume.
Conclusions
With no sex differences, the growth dynamics of the L3 vertebral body follow logarithmically in height, sagittal and transverse diameters, linearly (in cross-sectional area), and parabolically (in volume). The growth dynamics of the 3 ossification centers of the L3 vertebra follow logarithmically in transverse and sagittal diameters, and linearly (in cross-sectional area and volume). The age-specific reference intervals of the L3 vertebra and its 3 ossification centers present the normative values of clinical importance in the diagnosis of congenital spinal defects.

Keywords: Osteogenesis, Lumbar Vertebrae - radiography, Gestational Age, Fetus - radiography, Regression Analysis, Statistics as Topic, Tomography, X-Ray Computed

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Medical Science Monitor Basic Research eISSN: 2325-4416
Medical Science Monitor Basic Research eISSN: 2325-4416