Biomechanical Testing of Murine Tendons

Area of Science:

• Biomedical Engineering
• Orthopedics
• Musculoskeletal Research

Background:

• Tendon disorders are prevalent and often debilitating, with current treatments frequently failing.
• Accurate mechanical property assessment of tendons is essential for understanding function and evaluating new therapies.
• Murine models are vital for studying tendinopathies, but mechanical testing of mouse tendons presents significant challenges.

Purpose of the Study:

• To develop and validate a novel system for accurate mechanical testing of murine tendons.
• To overcome limitations in existing methods, such as gripping failures and variability.
• To facilitate the evaluation of novel treatments for tendinopathies using animal models.

Main Methods:

• Development of custom 3D-printed fixtures based on 3D bone reconstructions (humerus and calcaneus).
• Application of these fixtures for mechanical testing of supraspinatus and Achilles tendons in murine models.
• Utilizing additive manufacturing for precise fixture fabrication.

Main Results:

• The new system eliminated artifactual gripping failures, ensuring failure within the tendon substance.
• Testing time was significantly reduced, and reproducibility was enhanced.
• The method proved effective for testing specific murine tendons (supraspinatus, Achilles).

Conclusions:

• A novel 3D-printed fixture system enables accurate and reproducible mechanical testing of mouse tendons.
• This system addresses critical limitations in previous murine tendon testing methods.
• The adaptable approach supports research into tendon disorders and the efficacy of new therapeutic strategies.