Load transfer, damage, and failure in ligaments and tendons

Area of Science:

• Musculoskeletal biology
• Biomaterials science
• Orthopaedic research

Background:

• Ligaments and tendons are crucial for musculoskeletal load support.
• Their function relies on a complex hierarchical structure of protein and non-protein constituents.
• Connective tissue diseases and injuries can impair ligament and tendon integrity.

Purpose of the Study:

• To review ligament and tendon structure and function.
• To explore constituent roles in load transfer and material behavior.
• To summarize current understanding of damage mechanisms in these tissues.

Main Methods:

• Review of existing literature on ligament and tendon structure and mechanics.
• Analysis of studies investigating tissue constituents and their hierarchical organization.
• Examination of techniques used to probe structure-function relationships at various length scales.

Main Results:

• Ligament and tendon function is governed by a hierarchy of constituents, from collagen molecules to tissue.
• Disease and injury alter tissue composition and organization, impacting function.
• New techniques are revealing insights into molecular mechanisms of load transfer and early-stage damage.

Conclusions:

• Understanding the relationship between tissue constituents and mechanical behavior is key.
• Elucidating load transfer and damage mechanisms from molecular to tissue levels can inform treatments.
• This knowledge may lead to new therapeutic targets for connective tissue diseases and improved injury prevention/rehabilitation strategies.