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Related Experiment Video

Updated: Jul 9, 2026

The Social Dimension of Stress: Experimental Manipulations of Social Support and Social Identity in the Trier Social Stress Test

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Reverse dynamisation: a modern perspective on Stephan Perren's strain theory.

V Glatt¹, C H Evans, K Tetsworth

¹Department of Orthopedic Surgery, University of Texas Health Science Centre San Antonio, 7703 Floyd Curl Drive, MC 7774, San Antonio, TX 78229-3900, USA.glatt@uthscsa.edu.

European Cells & Materials

|June 10, 2021

Summary

Reverse dynamisation enhances bone healing by manipulating mechanical conditions during fracture repair. This method accelerates callus formation and conversion, leading to faster and more reliable bone union.

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Last Updated: Jul 9, 2026

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Published on: November 19, 2015

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Area of Science:

Biomedical Engineering
Orthopedic Surgery
Regenerative Medicine

Background:

Stephan Perren's strain theory is foundational in understanding bone healing mechanics.
Previous theories did not fully account for dynamic mechanical changes during healing.
Optimizing bone regeneration requires active control over the mechanical environment.

Purpose of the Study:

To review and extend Stephan Perren's strain theory using the concept of reverse dynamisation.
To explore how variable mechanical conditions can accelerate and optimize bone healing.
To provide a modern perspective on mechanical manipulation for bone regeneration.

Main Methods:

Literature review focusing on animal studies and recent advances in bone regeneration.
Analysis of the principles of reverse dynamisation in controlling mechanical stimuli.
Examination of the transition from flexible to rigid mechanical conditions during healing.

Main Results:

Reverse dynamisation involves a regimen of initially flexible, then rigid mechanical conditions.
Flexible conditions promote early callus formation, while rigid conditions enhance conversion to hard callus.
Animal studies provide evidence supporting the effectiveness of reverse dynamisation in bone healing.

Conclusions:

Reverse dynamisation offers a method to actively control the mechanical environment for improved bone healing.
This approach holds potential for accelerating union in fractures, osteotomies, and non-unions.
Mechanically guided bone regeneration represents a significant advance in orthopedic treatment.