Scar tissue graft as a filler for soft tissue augmentation

Area of Science:

• Regenerative Medicine
• Plastic Surgery
• Biomaterials Science

Background:

• Autogenous tissue grafts are standard for soft tissue augmentation in facial contouring and reconstruction.
• Dermal grafts offer longevity, while fat grafts are favored for ease of use.
• Existing scar tissue presents a potential alternative filler material.

Purpose of the Study:

• To evaluate the efficacy of injectable scar tissue as a soft tissue filler.
• To compare scar tissue grafts with dermal grafts for volumetric retention and histological characteristics.
• To explore the clinical implications of using scar tissue for augmentation.

Main Methods:

• Scar tissue was created and harvested from Wistar rats.
• Harvested scar and dermal tissues were depithelialized and minced.
• Grafts were injected into recipient sites and evaluated volumetrically and histologically at 1, 3, and 5 months.

Main Results:

• Initially, dermal grafts showed significantly higher retention than scar grafts.
• By 3 and 5 months, scar graft volume was comparable to dermal grafts.
• Scar grafts primarily consisted of dense connective tissue, suggesting fibrous tissue formation contributes to filler volume.

Conclusions:

• Injectable scar tissue demonstrates comparable volumetric results to dermal grafts up to five months post-transplantation.
• Scar tissue forms fibrous tissue, providing adequate filler volume, though neovascularization may be less robust than in dermal grafts.
• This finding has potential clinical applications for patients requiring simultaneous scar revision and soft tissue augmentation.