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Related Concept Videos

The Thoracic Cage: Sternum01:17

The Thoracic Cage: Sternum

3.1K
The thoracic or rib cage forms the body's thorax (chest) portion. Its primary function in the body is to protect vital organs in the thoracic cavity, such as the heart and the lungs. It consists of 12 pairs of ribs with their costal cartilages and the sternum. The ribs are anchored posteriorly to the 12 thoracic vertebrae (T1-T12).
The sternum is the elongated bony structure on the anterior side of the thoracic cage. It consists of three parts: the manubrium, the body, and the xiphoid...
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Related Experiment Video

Updated: Sep 1, 2025

Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling
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Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling

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Mechanical simulation study of reapproximated sternum rigidity comparing sternal fixation devices.

Eiki Nagaoka1, Hirokuni Arai2

  • 1Department of Cardiovascular Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan. nagaoka.cvsg@tmd.ac.jp.

General Thoracic and Cardiovascular Surgery
|August 16, 2022
PubMed
Summary

A new titanium cable system offers superior sternal fixation compared to traditional stainless-steel wire. This simulation study demonstrates the titanium cable

Keywords:
Mechanical simulationSternal fixationTitanium cable

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Area of Science:

  • Biomaterials Engineering
  • Orthopedic Surgery
  • Medical Device Design

Background:

  • Reliable sternal fixation is crucial in cardiac surgery post-sternotomy for wound healing and patient recovery.
  • Existing sternal closure devices lack clearly defined comparative characteristics.
  • The need for improved sternal fixation methods is evident in surgical practice.

Purpose of the Study:

  • To compare the biomechanical properties of a novel titanium alloy cable system against conventional stainless-steel wire for sternal fixation.
  • To evaluate the resistance of each sternal fixation material to various directional forces.
  • To determine the superior material for enhanced sternal closure stability.

Main Methods:

  • A simulation study utilizing monomer casting nylon sternum models.
  • Sternal models were fixated using either stainless-steel wire or a titanium alloy cable.
  • Models underwent displacement testing in longitudinal, antero-posterior, and horizontal directions to measure resistance.

Main Results:

  • The titanium alloy cable demonstrated significantly higher resistance to all tested directional displacements.
  • The titanium cable exhibited a twofold greater maximum strength compared to the stainless-steel wire.
  • Minimal deviations were observed with the titanium cable, indicating superior stability.

Conclusions:

  • The in vitro simulation study indicates that the titanium cable system provides stronger sternal fixation than stainless-steel wire.
  • The findings suggest the titanium cable is a promising alternative for improved sternal closure in cardiac surgery.
  • Enhanced sternal fixation with the titanium cable may contribute to better patient outcomes and recovery.