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- W2384160003 abstract "Objective To explore the security of the third and fourth sacral screw fixation through the anatomic measurement of the third and fourth sacral vertebra.Methods The structure and contour of the third and fourth sacral vertebra were observed in 32 adult sacrum specimens.The designed entry points were A、B and C.The A point was at the midpoint between the most medial margin of the superior foramina and the most superior margin of the inferior foramina.The B point was at the midpoint between the adjacent foramina and the C point was a crosspoint of the line from the B point horizontally toward the lateral sacral crest.The lengths of the sacral screw tunnel of the left,right,up and down sides passing through the median zone of the sacrum,the lengths of the vertical trajectory,and the length of the sacral tunnel of both sides through the lateral zone of the sacrum on the sagittal and horizontal planes,and the length of the sacral tunnel of both sides through the lateral zone of the sacrum on the sagittal and sagittal planes were D1,D2,D3,d1 and d3 respectively.The deviation angles of the sacral screw passing through the medial zone of the vertebra and the deviation angles of the sacral screw passing through the lateral zone of the both sides vertebra on the sagittal and horizontal and sagittal planes were α,β,θ and φ respectively.Results At the third sacral vertebra,if the entry points were A or B.The value of β andθwere(45.21±10.66)°and(8.50±3.53)°.If The entrying points were C,the values ofα andθ were(52.00±7.55)°and(19.05±6.36)°.At the fourth sacral vertebra,if the entry points were A or B,the values of β,θ and φ were(49.50±9.53)°(12.00±4.24)°and(14.00±2.83)°.If the entry point were C,the values of θ and φ were(13.50±3.54)°和(28.50±2.12)°.Conclusion Understanding of the anatomic structure and the precisely installed location of the screw can ensure the successful fracture fixation of third and fourth sacral screw." @default.
- W2384160003 created "2016-06-24" @default.
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- W2384160003 date "2012-01-01" @default.
- W2384160003 modified "2023-09-28" @default.
- W2384160003 title "The anatomic study on the third and fourth sacral screw" @default.
- W2384160003 hasPublicationYear "2012" @default.
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