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Inflammatory Response

Inflammatory Response

An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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Related Experiment Video

Updated: May 6, 2026

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint

Published on: March 7, 2014

The In Vivo Biological Response to Intra-Articular Injected Polycarbonate Urethane Wear Debris Particles.

Jane A E Gruisen¹, Ilona M Punt¹, Ryan Siskey²

¹Maastricht University Medical Centre, Department of Trauma and Orthopedic Surgery, Maastricht, the Netherlands.

Journal of Biomedical Materials Research. Part B, Applied Biomaterials

|April 7, 2025

Summary

Polycarbonate urethane (PCU) particles showed minimal biological response in rabbit knee joints, supporting its use in joint replacements. Even when generated, PCU wear debris is unlikely to cause significant inflammation.

Keywords:

biological response polycarbonate urethane wear particles

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Last Updated: May 6, 2026

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Biological Compatibility Profile on Biomaterials for Bone Regeneration

Published on: November 16, 2018

Area of Science:

Biomaterials Science
Orthopedic Research
Wear Particle Toxicology

Background:

Wear particles are common in orthopedic prosthetic joint replacements.
Polycarbonate urethane (PCU) exhibits low wear rates and minimal biological response in some applications.
Preclinical data on PCU particle response in synovial joints is limited.

Purpose of the Study:

To evaluate the biological response to polycarbonate urethane (PCU) wear particles in synovial joints.
To compare PCU particle response with ultra-high-molecular-weight-polyethene (UHMWPE) particles in a rabbit model.
To assess PCU's suitability as a bearing surface in joint replacements.

Main Methods:

Generated PCU and UHMWPE particles in vitro; characterized using SEM.
Injected PCU, UHMWPE particles, or saline into rabbit knee joints.
Assessed histopathological reactivity scores after 3 months.

Main Results:

Generated PCU and UHMWPE particles were primarily in the submicron size range.
Both PCU and UHMWPE particles elicited minimal to non-existent biological responses (scores ≤ 0.5).
Wear particles did not disperse from the injection site.

Conclusions:

PCU wear particles are unlikely to trigger a significant inflammatory response in synovial joints.
Findings support the use of PCU as a bearing surface material in orthopedic joint replacements.
PCU demonstrates a favorable biological profile concerning wear debris generation.