Enhancing long-term fixation in thoracolumbar injuries - From screw design to bone quality optimization

Sep 28, 2026

Uploaded by Aldword

Pedicle screw fixation remains the gold standard for stabilizing unstable thoracolumbar fractures, yet long-term instrumentation stability continues to challenge surgeons and implant designers. The discussion evaluates predictors of pedicle-screw loosening, including low bone radiodensity, longer fixation constructs, and extensive decompression. It outlines adjunctive biomechanically sound strategies—auxiliary posterior fusion, anterior column reconstruction, and intermediate screw usage—while emphasizing preoperative bone-quality assessment via CT Hounsfield unit analysis and MRI-derived vertebral bone quality scoring.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages6

Reading Time15 min

AccessFree to download

Introduction

Bone quality: A critical but modifiable risk factor

Core Tip

Citation

| W | J | O | World Journal of
Orthopedics | | --- | --- | --- | --- | Submit a Manuscript: [https://www.f6publishing.com](https://www.f6publishing.com) World J Orthop 2025 December 18; 16(12): 112406 DOI: 10.5312/wjo.v16.i12.112406 ISSN 2218-5836 (online) EDITORIAL Enhancing long-term fixation in thoracolumbar injuries: From screw design to bone quality optimization Musa Ergin, Süha A Aktaş Specialty type: Orthopedics Provenance and peer review: Invited article; Externally peer reviewed. Peer-review model: Single blind Peer-review report’s classification Scientific Quality: Grade A, Grade B Novelty: Grade A, Grade B Creativity or Innovation: Grade A, Grade B Scientific Significance: Grade A, Grade B P-Reviewer: Shi T, MD, Assistant Professor, Associate Chief Physician, China; Sun XY, MD, PhD, Professor, China Received: July 28, 2025 Revised: August 17, 2025 Accepted: October 20, 2025 Published online: December 18, 2025 Processing time: 144 Days and 17.9 Hours Musa Ergin, Department of Orthopaedics and Traumatology, Cihanbeyli State Hospital, Konya 42850, Türkiye Süha A Aktaş, Department of Orthopedics and Traumatology Clinic, Istanbul Physical Therapy and Rehabilitation Training and Research Hospital, Istanbul 34020, Türkiye Co-first authors: Musa Ergin and Süha A Aktaş . Corresponding author: Musa Ergin, Department of Orthopaedics and Traumatology, Cihanbeyli State Hospital, Hastane Cd. No. 61 Cihanbeyli, Konya 42850, Türkiye. [drmusaergin@gmail.com](drmusaergin@gmail.com) Abstract Pedicle screw fixation remains the gold standard for stabilizing unstable thoracolumbar fractures. However, ensuring long-term instrumentation stability continues to challenge both surgeons and implant designers. The study by Bokovet al contributes significantly to this discussion, identifying predictors of pediclescrew loosening such as low bone radiodensity, longer fixation constructs, and extensive decompression. Adjunctive strategies-auxiliary posterior fusion, anterior column reconstruction, and intermediate screw usage-support an individualized, biomechanically sound surgical plan. In this article, we explore the clinical relevance of these findings within spinal trauma care. We emphasize the role of preoperative bone quality assessment, including computed tomography-based Hounsfield unit analysis and magnetic resonance imaging-derived vertebral bone quality score, as modifiable predictors of long-term outcomes. We also discuss innovations in screw design, surface coatings, and patient-specific planning to reduce failure risk. Furthermore, emerging technologies such as finite element modeling and 3D-printed instrumentation may refine patient-specific strategies. By integrating biomechanical principles with personalized surgical planning, future approaches may enhance fixation durability. Ultimately, aligning mechanical stability with biological sustainability is critical to reducing implant failure in complex thoracolumbar trauma cases. Key Words: Thoracolumbar fractures; Pedicle screw loosening; Bone quality; Finite element modeling; Spinal fixation ©The Author(s) 2025. Published by Baishideng Publishing Group Inc. All rights reserved. WJO [https://www.wjgnet.com](https://www.wjgnet.com) 1 December 18, 2025 Volume 16 Issue 12 Ergin M et al. Long-term stability in thoracolumbar instrumentation Core Tip: This article highlights key factors influencing long-term pedicle screw stability in thoracolumbar fractures, including bone quality, construct length, and decompression extent. Practical strategies such as computed tomography-based Hounsfield unit and magnetic resonance imaging-based vertebral bone quality score assessment, the use of intermediate screws, and anterior column reconstruction are discussed. Technological advances like coated implants and patient-specific planning are emphasized to enhance long-term outcomes. Integration of these approaches may help reduce impl

FAQs

What are the main predictors of pedicle screw loosening in thoracolumbar injuries?

Low bone radiodensity, longer fixation constructs, and extensive decompression are identified as key predictors of pedicle-screw loosening.

Which preoperative assessments are emphasized to improve long-term outcomes?

Preoperative bone quality assessment is emphasized, including CT-based Hounsfield unit analysis and MRI-derived vertebral bone quality scoring.

What adjunctive surgical strategies are discussed to support instrumentation stability?

Adjunctive strategies include auxiliary posterior fusion, anterior column reconstruction, and the use of intermediate screws to support an individualized biomechanically sound plan.

Sep 28, 2026

Uploaded by Aldword