Introduction: Atlas Vertebra (1st cervical vertebra) is called “atypical vertebra” and has unusual shape andarchitecture. The dimensions of atlas vertebra are most essential in the technique cranio-vertebral regionstabilization. Retroarticular canals foramina transversaria important for transoral transpalatinalapproaches to clivus, axis.Aim objectives: To study incidence symmetry transversaria....

BACKGROUND Monsegmental pedicle instrumentation (MSPI) has been used to treat thoracolumbar fractures. However, there are few reports about the biomechanical characteristics of MSPI compared with traditional short-segment pedicle instrumentation (SSPI) in management of unstable thoracolumbar fractures, and the influence of vertebral fracture on screw stability is still unclear. METHODS This s...

The hagfish, a group of extant jawless fish, are known to lack true vertebrae and, for this reason, have often been excluded from the group Vertebrata. However, it has yet to be conclusively shown whether hagfish lack all vertebra-like structures, and whether their somites follow developmental processes and patterning distinct from those in lampreys and gnathostomes. Here we report the presence...

INTRODUCTION Osteoporosis, the most common metabolic disorder, can eventually lead to fragility fractures. Of all osteoporotic fractures, vertebral wedge fractures are the most common. They are associated with pain, a decrease in quality of life, and a change in spinal alignment. The changed spinal alignment increases the chance of subsequent fractures: a wedge fracture changes the loading dire...

The German Shepherd is among the breeds most prone to pathologies of lumbosacral spine. aim study was examine how presence spine pathology affects shape lumbar and dimensions individual vertebrae. Mathematical analysis consisted three measurements for each vertebra. Based on analysis, it concluded that there a correlation between height first five vertebrae occurrence transitional vertebra (LTV...

Caudal regression syndrome is a rare congenital anomaly with characteristic agenesis or dysgenesis of caudal vertebrae varying from isolated partial agenesis of coccyx or entire lumbosacral vertebrae.1,2 It may be associated with congenital anomaly of spinal cord, genitourinary tract, and gastrointestinal tract.3–5 The children with extensive bony defects in caudal regression syndrome may prese...

BACKGROUND Vertebral bodies in patients with adolescent idiopathic scoliosis (AIS) usually have frontal wedge deformities. However, the plasticity of the deformed vertebrae in skeletally immature patients is unknown. The purpose of our study was to clarify the plasticity of vertebral deformities in skeletally immature patients with AIS by using in vivo three-dimensional (3D) analysis. METHODS...

The purpose of this study is to identify regions of spinal column in which more than three contiguous vertebrae can be reliably and quickly aligned within 1 mm using a 6-degree (6D) couch and full body immobilization device. We analyzed 45 cases treated over a 3-month period. Each case was aligned using ExacTrac x-ray positioning system with integrated 6D couch to be within 1° and 1 mm in all s...

Mechanical compression and distraction forces are known to modulate growth in vertebral growth plates, and are implicated in the progression of scoliosis. The amount of cellular enlargement is thought to be a key variable correlating with differing growth at different anatomical sites. This work tested the hypothesis that growth differences produced by mechanical loading are associated with alt...