Morphometry of pedicle and vertebral body in a Mexican population by CT and Fluroscopy

Abstract

It is necessary to have precise anatomical knowledge of lumbar pedicles for the safe placement of screws. There are not reports about the morphometry of lumbar pedicles in a Mexican population exist. A descriptive, observational and cross-sectional study was done in 60 cadavers from the dissection lab of the Human Anatomy Department of the Medicine School. The aim of the study was to quantify the morphometric characteristics of the pedicles of the lumbar spine in a Mexican population. A total of 60 cadavers were evaluated by fluoroscopy and CT from L1 to L5, in the age range of 40 to 78 years. Each vertebral pedicle was measured in the axial, sagittal and coronal planes. The measurements included the minimum pedicle width, the pedicle angle, the distance to anterior cortex, and anteroposterior and interpedicular spinal canal diameters. CT evaluation showed a progressive and gradual increase in the width of the pedicles from L1 (7.81 ±1.30 mm) to L5 (14.36 ±14.36 mm). A progressive and gradual decrease of pedicle length from L1 (20.92 ±2.62 mm) to L5 (17.23 ±1.35 mm). When fluoroscopy was used there was the same relationship, but the values were higher than those obtained by CT. The values for widths and lengths are slightly higher in males than in females, but do not reveal any significant difference (p<0.05). The data in this study indicates that pedicle screws (5.5-6.5mm) may be used in the lumbar region.

Study of pedicles and spinal canal diameters at the level of lumbar vertebral in normal adult Saudi population using computed tomography

“…This increasing pattern was observed in both male and female, the mean values of PW for female were (L1=4.4 mm; L2=5.1 mm; L3=6.4 mm; L4=8.1 mm; L5=10.5 mm) while for male they were (L1=6.8 mm; L2=7.7 mm; L3=9.0 mm; L4=10.4 mm; L5=13.3 mm) as presented in (Fig 4), the mean values of pedicle width (PW) in male was higher than in female and a significant differences were observed between the genders at each lumbar level (Table 2). This result agree with A study conducted by Urrutia Vega E. et al ( 2009) "Morphometry of Pedicle and Vertebral Body in a Mexican Population by CT and Fluoroscopy" [13], and with Singh, V. et al, in 2021 (Computed Tomographic Morphometry of Lumbar Spine in Indian Population) [14], their studies conclude that a progressive and gradual increase in the width of the pedicles from L1 to L5. However the Saudis mean pedicle width (PW) was lower than that in Mexican and Indian Population.…”