Mechanical Intelligence in Bone Regeneration: Bridging Material and Cellular Memory for Enhanced Healing

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Biomechanics

Background:

• Bone regeneration is influenced by mechanical cues, but current treatments often overlook the dynamic nature of healing.
• Delayed union, nonunion, and mechanically mismatched repairs present significant clinical challenges.

Purpose of the Study:

• To introduce the concept of mechanical intelligence and memory in bone repair.
• To explore how biomaterials, cells, and therapeutic devices store, transform, and transmit mechanical history during healing.
• To highlight the potential of coupling material and cellular memory for personalized bone repair strategies.

Main Methods:

• This review synthesizes current literature on mechanical cues in bone regeneration.
• It proposes a framework of 'mechanical intelligence' and 'memory' in biomaterials and cells.
• The review analyzes the interplay between material properties and cellular responses throughout the healing process.

Main Results:

• Two forms of memory are identified: material memory (scaffolds/implants) and cellular memory (mechanotransduction, lineage commitment).
• The temporal integration of these memories is crucial for effective bone healing, from initial cell recruitment to mature callus formation.
• Coupling material and cellular memory offers a pathway to optimize scaffold mechanics, support osteogenesis, and mitigate adverse responses like stress shielding.

Conclusions:

• Integrating material and cellular memory can lead to stage-specific scaffolds and adaptive fixation strategies.
• Mechanically timed rehabilitation and sensing-assisted modeling are proposed for personalized bone repair.
• This approach holds promise for improving outcomes in challenging bone healing scenarios.