Morphometry of the positioning of cortical trajectory pedicle screws in brazilians

• Autor(a) principal: Fernando Magalhãesgosende
• Data de Publicação: 2019
• Outros Autores: Rogério Lúcio Chaves de Resende, Carlos Bauer Namem Lopes Junior, Jefferson Soares Leal, Paula Silveira Santana, Ângelo Ribeiro Vaz de Faria, Luiz Claudio de Moura França
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: http://hdl.handle.net/1843/53479; https://orcid.org/0000-0003-1058-3804
• topic: Bone Screws; Spinal Fusion; Spine/surgery; Parafusos Ósseos; Fusão Vertebral; Coluna Vertebral; Procedimentos Cirúrgicos Operatórios

Objective: Morphometric study of the positioning of the cortical trajectory pedicle screw in the lumbar spine of Brazilian patients of different sexes and ages, through the use of computed tomography images, in order to obtain more reliable data about cortical screw insertion and the variations observed, providing assistance for a safer, more effective approach with fewer complications. Methods: Selection of 100 patients from a database, alternating by sex, measuring the length, diameter, cephalic angulation, and lateral angulation of the vertebrae from L1 to L5. Results: Statistically significant measurements were obtained for the four different parameters in relation to sex. The mean age was 56, with a minimum of 20 and a maximum of 87 years. The L4 and L5 screws showed a reduction in relation to the other levels, while the width showed a progressive increase starting at L3. Lateral angulation was the parameter with the least variation among the levels, while there was greater variation and a reduction from L4 to L5 in cephalic angulation. Conclusion: Statistically significant results were obtained for length, diameter, lateral and cephalic angulation. Sex was a significant factor in spine surgery instrumentation using the cortical trajectory pedicle screw technique. Level of evidence I; Diagnostic study (investigation of an examination for diagnosis).