Biomechanical Analysis for Enhanced Expulsion-proof Intervertebral Fusion Device

Shaolong Tang; Dan Pan; Siyuan Chen; Hengyuan Li; Zhaoming Ye

doi:10.1115/1.4067574

Biomechanical Analysis for Enhanced Expulsion-proof Intervertebral Fusion Device

J Biomech Eng. 2025 Jan 10:1-17. doi: 10.1115/1.4067574. Online ahead of print.

Authors

Shaolong Tang¹, Dan Pan², Siyuan Chen², Hengyuan Li³, Zhaoming Ye³

Affiliations

¹ Department of orthopedics, the Second Affiliated Hospital of Medical College of Zhejiang University, Hangzhou, Zhejiang, 310000, China; Department of Spinal Surgery, Zhuzhou Central Hospital, Zhuzhou, Hunan, 412000, China.
² Department of Spinal Surgery, Zhuzhou Central Hospital, Zhuzhou, Hunan, 412000, China.
³ Department of orthopedics, the Second Affiliated Hospital of Medical College of Zhejiang University, Hangzhou, Zhejiang, 310000, China.

PMID: 39790095
DOI: 10.1115/1.4067574

Abstract

This study aims to compare the sinking and shifting of an enhanced escape-proof intervertebral fusion device with a traditional TLIF intervertebral fusion device.Five specimens each of the improved escape-resistant intervertebral cage and the traditional TLIF cage were selected. Four types of mechanical tests were conducted on each cage, Furthermore, a blade-cutting torque test was performed on the escape-resistant cage, with the recording of load-displacement curves and mechanical values.In static axial compression performance testing and static subsidence testing and dynamic subsidence testing, the improved escape-resistant cage were similar to those of the traditional TLIF ccage. In static escape performance testing, the maximum escape force when the blade rotated out for the improved escape-resistant cage (534.02±21.24N) was higher than the maximum escape force when the blade did not rotate out (476.97±24.45N) (P=6.81E-04). The maximum escape force when the blade rotated out for the improved escape-resistant cage (534.02±21.24N) was significantly higher than that of the traditional TLIF cage (444.01±12.42N) (P=9.82E-05). The improved escape-resistant cage product effectively enhances the device's escape prevention and anti-subsidence performance, it demonstrates biomechanical advantages.