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논문 기본 정보

자료유형
학술저널
저자정보
Lin Maohua (Ocean and Mechanical Engineering Florida Atlantic University Boca Raton FL USA) Paul Rudy (Ocean and Mechanical Engineering Florida Atlantic University Boca Raton FL USA) Shapiro Stephen Z. (Marcus Neuroscience Institute Boca Raton Regional Hospital Boca Raton FL USA) Doulgeris James (Marcus Neuroscience Institute Boca Raton Regional Hospital Boca Raton FL USA) O’Connor Timothy E. (Jacobs School of Medicine and Biomedical Sciences University at Buffalo Buffalo NY USA) Tsai Chi-Tay (Ocean and Mechanical Engineering Florida Atlantic University Boca Raton FL USA) Vrionis Frank D. (Neurosurgery Marcus Neuroscience Institute Boca Raton Regional Hospital Boca Raton FL USA)
저널정보
대한척추외과학회 Asian Spine Journal Asian Spine Journal Vol.16 No.5
발행연도
2022.10
수록면
615 - 624 (10page)
DOI
10.31616/asj.2021.0424

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Study Design: This study compares four cervical endplate removal procedures, validated by finite element models.Purpose: To characterize the effect of biomechanical strength and increased contact area on the maximum von Mises stress, migration, and subsidence between the cancellous bone, endplate, and implanted cage.Overview of Literature: Anterior cervical discectomy and fusion (ACDF) has been widely used for treating patients with degenerative spondylosis. However, no direct correlations have been drawn that incorporate the impact of the contact area between the cage and the vertebra/endplate.Methods: Model 1 (M1) was an intact C2C6 model with a 0.5 mm endplate. In model 2 (M2), a cage was implanted after removal of the C4–C5 and C5–C6 discs with preservation of the osseous endplate. In model 3 (M3), 1 mm of the osseous endplate was removed at the upper endplate. Model 4 (M4) resembles M3, except that 3 mm of the osseous endplate was removed.Results: The range of motion (ROM) at C2C6 in the M2–M4 models was reduced by at least 9º compared to the M1 model. The von Mises stress results in the C2C3 and C3C4 interbody discs were significantly smaller in the M1 model and slightly increased in the M2–M3 and M3–M4 models. Migration and subsidence decreased from the M2–M3 model, whereas further endplate removal increased the migration and subsidence as shown in the transition from M3 to M4.Conclusions: The M3 model had the least subsidence and migration. The ROM was higher in the M3 model than the M2 and M4 models. Endplate preparation created small stress differences in the healthy intervertebral discs above the ACDF site. A 1 mm embedding depth created the best balance of mechanical strength and contact area, resulting in the most favorable stability of the construct.

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