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. 2020 Jun 26;10:10495. doi: 10.1038/s41598-020-65341-1

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Range of motion (ROM) measurements at 24 weeks using three different test modes (left/right axial rotation, flexion/extension, and left/right lateral bending). In all test modes, ROM values were significantly lower in the porous strut group than those in the dense strut group, showing that porous struts achieved better fusion quality with higher mechanical stability. The mean ROM measurements of each group are expressed as the mean ± s.d and histogram, bars represent standard deviation values *p < 0.05.