Anatomical Characteristics of Infra-Lamina Ridge in Chinese Population

Abstract

SUMMARY:The aim of our study was to observe the occurrence rate and morphological characteristics of Infra-Lamina ridge (ILR) in Chinese population and provide a comprehensive reference for its clinical implication. Vertebrae columns of 82 sets of Chinese adult skeletons were collected. The shape of ILR was classified into three types; the occurrence of it in different sides and sexes were counted. The length, width, thickness of ILR were measured using a caliper with 0.02 mm accuracy. The ILR was usually found to occur from C7 to L5, with its frequency higher from T8 to 12, and highest at T10-being up to 80.5%. There was significant statistical difference to the occurrence rate by side, sex and vertebral level. The largest values in its length and width were from T9 to T12. The ILR at T10 was largest in dimensions, being 4.1±2.1 mm in length and 4.4±2.3 mm in width. The ILR is more frequently detected in female and at the left side, at the lower thoracic spine with a larger dimension.

Three-dimensional digitizing and anatomic study of lumbar vertebral canal and pedicle in children.

“…Therefore, the diameter of the spinal canal has important meaning for the clinical judgment of spinal development, spinal stenosis, or pedicle screw implantation. However, the current studies are more concentrated on adults [ 15 ], and a certain Chinese researcher [ 16 ], who observed 100 cases of adult lumbar spinal specimens, concluded that the spinal ID in both men and women showed an increasing trend with the increasing vertebral sequence. Some foreign scholars reported [ 17 , 18 ] that the overall trends were similar, but different races had different spinal IDs, which might be related to ethnicities, geographies, or sexes.…”