Bioengineered human tissue regeneration and repair using endogenous stem cells

Area of Science:

• Regenerative Medicine
• Biomaterials Engineering
• Orthopedic Surgery
• Plastic and Reconstructive Surgery

Background:

• Bone and cartilaginous tissue defects present significant reconstructive challenges.
• Existing treatments often involve autografts or allografts with associated limitations.
• Harnessing the body's endogenous regenerative capacity offers a promising alternative.

Purpose of the Study:

• To present a novel approach for generating bone and cartilage using the intercostal rib space.
• To evaluate the efficacy of this method in treating a deformed metacarpophalangeal joint and microtia.
• To investigate the cellular mechanisms underlying tissue regeneration.

Main Methods:

• Utilized anatomically precise 3D molds placed on intercostal rib perichondro-periosteal or perichondral flaps.
• No exogenous materials were used, relying solely on the regenerative capacity of the rib space.
• Assessed regenerated constructs after 6 months and evaluated clinical outcomes for joint repair and microtia reconstruction.

Main Results:

• Generated anatomically precise metacarpal head and auricle constructs within 6 months.
• Successfully repaired a deformed metacarpophalangeal joint using the regenerated metacarpal head.
• Achieved good aesthetic and functional outcomes in five microtia patients, with long-term safety and stability confirmed.

Conclusions:

• This method effectively utilizes endogenous factors for tissue repair and regeneration.
• The technique provides a viable treatment strategy for bone and tissue structural defects.
• Regenerated auricular constructs demonstrated safety and stability in microtia reconstruction.