Range of Motion After Thoracolumbar Corpectomy: Evaluation of Analogous Constructs with a Novel Low-profile Anterior Dual-rod System and a Traditional Dual-rod System

Overview

Journal Eur Spine J

Specialty Orthopedics

Date 2015 Apr 29

PMID 25917825

Citations 1

Authors

Martin Gehrchen

Sajan K Hegde

Mark Moldavsky

Suresh Chinthukunta

Manasa Gudipally

Brandon Bucklen

Kanaan Salloum

Saif Khalil

Affiliations

Soon will be listed here.

Abstract

Study Design: An in vitro biomechanical study.

Objectives: To compare the biomechanical stability of traditional and low-profile thorocolumbar anterior instrumentation after a corpectomy with cross-connectors. Dual-rod anterior thoracolumbar lateral plates (ATLP) have been used clinically to stabilize the thorocolumbar spine.

Methods: The stability of a low-profile dual-rod system (LP DRS) and a traditional dual-rod system (DRS) was compared using a calf spine model. Two groups of seven specimens were tested intact and then in the following order: (1) ATLP with two cross-connectors and spacer; (2) ATLP with one cross-connector and spacer; (3) ATLP with spacer. Data were normalized to intact (100 %) and statistical analysis was used to determine between-group significances.

Results: Both constructs reduced motion compared to intact in flexion-extension and lateral bending. Axial rotation motion became unstable after the corpectomy and motion was greater than intact, even with two cross-connectors with both systems. Relative to their respective intact groups, LP DRS significantly reduced motion compared to analogous DRS in flexion-extension. The addition of cross-connectors reduced motion in all loading modes.

Conclusions: The LP DRS provides 7.5 mm of reduced height with similar biomechanical performance. The reduced height may be beneficiary by reduced irritation and impingement on adjacent structures.

Citing Articles

Finite Element Analysis of a Novel Anterior Locking Plate for Thoracolumbar Burst Fracture.

Ren P, Cheng X, Lu C, Wu H, Yao S, Yang S Biomed Res Int. 2021; 2021:2949419.

PMID: 34671672 PMC: 8523228. DOI: 10.1155/2021/2949419.

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