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Effect of TLIF Cage Placement on In Vivo Kinematics
Journal article   Open access   Peer reviewed

Effect of TLIF Cage Placement on In Vivo Kinematics

Alejandro D. Castellvi, Shankar K. Thampi, Daniel J. Cook, Matthew S. Yeager, Yuan Yao, Qing Zou, Donald M. Whiting, Michael Y. Oh, Edward R. Prostko and Boyle C. Cheng
International journal of spine surgery, v 9, pp 38-38
01 Jan 2015
DOI: https://doi.org/10.14444/2038
PMID: 26273556
Featured in Collection :   UN Sustainable Development Goals @ Drexel
url
https://doi.org/10.14444/2038View
Published, Version of Record (VoR)Maybe Open Access (Publisher Bronze),  Open

Abstract

Life Sciences & Biomedicine Science & Technology Surgery
Background The influence of interbody cage positioning on clinical outcomes following lumbar interbody fusion is not well understood, though it has been hypothesized to play a significant role in stability of the treated level. The purpose of this study was to evaluate any correlations between cage placement in TLIF procedures and post-operative kinematics. Methods Thirteen patients who had previously undergone a TLIF procedure were evaluated using the Vertebral Motion Analysis (VMA) system, an automated fluoroscopic method of tracking kinematics in vivo. Upright and recumbent bending platforms were used to guide patients through a set range of motion (ROM) standing up and lying down, respectively, in both flexion- extension (FE) and lateral bending (LB). Intervertebral ROM was measured via fluoroscopic images captured sequentially throughout the movement. DICOM images acquired by the VMA system were used to calculate cage positioning. Intra-rater and inter-rater reliability of TLIF cage position were also assessed. Results Statistically significant correlations were noted between sagittal cage position and lying LB (r = -0.583, p = 0.047), and coronal cage positioning with both standing (r = 0.672, p = 0.012) and lying LB (r = 0.632, p = 0.027). Additionally, the correlation between sagittal cage position and standing FE was trending towards significance (r = -0.542, p = 0.055). Conclusions The intuitive correlation between coronal cage position and both standing and lying lateral bending ROM is supported by the data from this study, suggesting placement closer to midline is optimal for stability. Additionally, the VMA system appears to be a sensitive and repeatable means to obtain information on postoperative kinematic outcomes. Further work to establish the relationship between cage placement, these kinematic outcomes and, potentially, functional pain outcomes seems to be warranted based on the results obtained here.

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9 Record Views
18 citations in Web of Science
15 citations in Scopus

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Surgery
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