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Microcracking in Concrete

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Multimodal Approach to Assess Bone Regeneration and Scaffold Performance

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Crack initiation processes in acrylic bone cement.

P E Sinnett-Jones¹, M Browne, A J Moffat

¹Bioengineering Sciences Research Group, School of Engineering Sciences, Southampton University, Southampton SO17 1BJ, United Kingdom.

Journal of Biomedical Materials Research. Part A

|May 17, 2008

Summary

This summary is machine-generated.

Understanding bone cement fatigue failure is improved by monitoring internal defects. This study reveals crack initiation near pores and microcracking in barium sulfate agglomerations, offering insights into bone cement performance.

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Proximal Cadaveric Femur Preparation for Fracture Strength Testing and Quantitative CT-based Finite Element Analysis

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Published on: March 11, 2017

Area of Science:

Biomaterials Science
Mechanical Engineering
Orthopedic Surgery

Background:

Bone cement failure is poorly understood due to challenges in monitoring internal defect evolution.
Internal defects significantly influence the in vivo fatigue failure of bone cement.
Optimizing bone cement performance requires a better grasp of micromechanics.

Purpose of the Study:

To integrate high-resolution imaging with damage monitoring techniques.
To elucidate the chronology and mechanisms of fatigue failure in bone cement.
To investigate crack initiation and propagation pathways.

Main Methods:

High-resolution imaging techniques.
Complementary damage monitoring and detection methods.
Analysis of crack initiation and propagation in bone cement samples.

Main Results:

The study captured early-stage crack initiation, proposing initiation away from pores due to pore morphology and stress concentrations.
Barium sulfate (BaSO(4)) agglomerations were observed to microcrack during fatigue but were not the primary failure cause.
Cracks were observed to be contained within agglomerations due to matrix clamping during curing-induced shrinkage.

Conclusions:

The findings provide critical insights into the micromechanics of bone cement fatigue failure.
Understanding crack initiation near pores and the role of BaSO(4) agglomerations can inform cement design.
This research contributes to improving the longevity and performance of bone cements in orthopedic applications.