Cartilaginous spheroid-assembly design considerations for endochondral ossification: towards robotic-driven...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Spheroids are crucial for biofabricating functional tissues, enabling high cell densities for native-like structures.
• Cartilaginous spheroids are explored for endochondral bone formation applications.

Purpose of the Study:

• Investigate the assembly capacity and fusion kinetics of cartilaginous spheroids during endochondral bone formation.
• Define critical dimensions for spheroid-based cartilaginous mesotissues during maturation.
• Develop an automated biomanufacturing process for spheroid-based bone regeneration implants.

Main Methods:

• Assessed spheroid fusion capacity at different differentiation stages.
• Determined critical mesotissue dimensions based on spheroid maturity.
• Utilized image-guided robotics for automated spheroid targeting and registration.
• Implanted mesotissue assemblies subcutaneously to study endochondral ossification.

Main Results:

• Spheroid fusion kinetics and remodeling capacity decrease with increased spheroid maturity.
• Critical dimensions for mesotissue engineering were defined based on maturation time points.
• Automated robotics successfully targeted and registered spheroids for biomanufacturing.
• Spheroid fusion parameters influence endochondral ossification.

Conclusions:

• Spheroid maturity impacts fusion and remodeling, necessitating defined design considerations for mesotissue engineering.
• An automated, image-guided robotics platform enables high-precision biomanufacturing of spheroid-based implants.
• This work provides a roadmap for producing implants for bone regeneration using spheroid technology.