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MORPHOLOGIC CHANGES OF LUMBAR FORAMEN AND SEGMENTAL LORDOSIS RELATED TO CAGE POSITION IN TRANSFORAMINAL LUMBAR INTERBODY FUSION
ABSTRACT Objectives: To evaluate the influence of the positioning of cages on segmental lumbar lordosis and height of the intervertebral foramen when performing transforaminal interbody fusion. Method: cages of 8, 10 and 12 mm were inserted into the disc spaces of the L3-L4, L4-L5 and L5-S1 segments...
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Published in: | Coluna 2024, Vol.23 (2) |
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Main Authors: | , , , , , |
Format: | Article |
Language: | eng ; por |
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Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | ABSTRACT Objectives: To evaluate the influence of the positioning of cages on segmental lumbar lordosis and height of the intervertebral foramen when performing transforaminal interbody fusion. Method: cages of 8, 10 and 12 mm were inserted into the disc spaces of the L3-L4, L4-L5 and L5-S1 segments of three human cadavers. Cages were positioned in the anterior, middle and posterior part of the disc space. The transforaminal interbody fusion technique was performed using: unilateral facetectomy, bilateral facetectomy and facetectomy with resection of the adjacent lamina, spinous process and yellow ligament (posterior column osteotomy). The lordosis of the lumbar segment and the height of the intervertebral foramen were measured before and after placement of the cages. Results: The placement of cages in the anterior and middle portion of the disc space produced an increase in segmental lordosis and placement in the posterior portion reduced segmental lordosis. The height of the intervertebral foramen increased with the placement of cages in the posterior portion and a reduction in height with the placement of the interbody spacer in the anterior and middle portion of the disc space. Conclusion: The positioning of the interbody spacer in transforaminal interbody arthrodesis influences segmental lumbar lordosis and the height of the intervertebral foramen. Level of Evidence III; Experimental study.
RESUMO: Objetivos: Avaliar a influência do posicionamento dos espaçadores intersomáticos sobre a lordose lombar segmentar e altura do forame intervertebral na realização da artrodese intersomática transforaminal. Métodos: espaçadores intersomáticos de 8, 10 e 12 mm foram inseridos nos espaços discais dos segmentos L3-L4, L4-L5 e L5-S1 de três cadáveres humanos. Os espaçadores foram posicionados na parte anterior, média e posterior do espaço discal. A técnica da artrodese intersomática transforminal foi realizada por meio da: facetectomia unilateral, facetectomia bilateral e facetectomia com ressecção da da lâmina adjacente, processo espinhoso e ligamento amarelo (osteotomia da coluna posterior). A lordose do segmento lombar e a altura do forame intervertebral foram mensurados antes e após a colocação dos espaçadores interespinhosos. Resultados: A colocação dos espaçadores intersomáticos na porção anterior e média do espaço discal produziu aumento da lordose segmentar e a colocação na porção posterior reduziu a lordose segmentar. A altura do forame intervertebral ap |
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ISSN: | 1808-1851 2177-014X 2177-014X |
DOI: | 10.1590/s1808-185120242302288424 |