Biomechanical comparison of posterior short-segment fixation with or without intermediate screws for thoracolumbar burst fractures under normal and osteoporotic conditions: a finite element analysis

Cheng Xu; XiangMing Zhang; Hong Jian Cao; Chao Shen; Feng Ge; Xuedong Bai; Chao Zhang

doi:10.31616/asj.2025.0442

January 12, 2026Asian Spine JournalOpen Access

Biomechanical comparison of posterior short-segment fixation with or without intermediate screws for thoracolumbar burst fractures under normal and osteoporotic conditions: a finite element analysis

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Key Points

This research aims to determine the effectiveness of different fixation techniques for treating thoracolumbar burst fractures under varied conditions.
Conducted a finite element analysis to simulate thoracolumbar burst fractures
Compared posterior short-segment fixation with and without intermediate screws
Assessed mechanical performance under normal and osteoporotic conditions
More rigid six-screw constructs showed lower risk of mechanical failure
Intermediate screws in fixation significantly improved stability in osteoporotic models
Findings suggest better outcomes for patients with osteoporosis

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Implication

Finite element analysis compares fixation methods for burst fractures, indicating more rigid options may prevent failure in osteoporotic cases.

Abstract

Our findings may facilitate implant selection for osteoporotic burst fractures, supporting the use of more rigid fixation sixscrew constructs to reduce the risk of mechanical failure and postoperative re-collapse.

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Cite This Study

Xu et al. (2026) studied this question.

synapsesocial.com/papers/696719b10a9733890c4ee1c9 https://doi.org/10.31616/asj.2025.0442

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Biomechanical comparison of posterior short-segment fixation with or without intermediate screws for thoracolumbar burst fractures under normal and osteoporotic conditions: a finite element analysis

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Biomechanical comparison of posterior short-segment fixation with or without intermediate screws for thoracolumbar burst fractures under normal and osteoporotic conditions: a finite element analysis

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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