Injectable non-leaching tissue-mimetic bottlebrush elastomers as an advanced platform for reconstructive surgery

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Tissue Engineering

Background:

• Current biomedical materials often lack the mechanical properties of native tissues.
• Chemical leaching from implants poses significant health risks.
• Invasive implantation procedures increase health risks and complicate recovery.

Purpose of the Study:

• To design and administer minimally invasive injectable elastomers.
• To create leachable-free implants with tissue-matching mechanical properties.
• To enable tunable in vivo curing times for versatile biomedical applications.

Main Methods:

• Utilized a brush-like polymer architecture to create injectable elastomers.
• Administered elastomers for in vivo curing into implantable devices.
• Tuned elastomer curing times from minutes to hours.
• Assessed in vitro cell proliferation and in vivo inflammatory response.

Main Results:

• Developed injectable elastomers that cure in vivo into leachable-free implants.
• Achieved mechanical properties matching surrounding tissues.
• Demonstrated tunable curing times suitable for various surgical procedures.
• Confirmed support for in vitro cell proliferation.
• Observed in vivo implant integrity with mild inflammation and minimal fibrotic encapsulation.

Conclusions:

• Injectable elastomers offer a promising solution for safer, more effective biomedical implants.
• The tunable curing feature broadens applications from wound sealing to reconstructive surgery.
• This approach minimizes health risks associated with traditional materials and procedures.