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Updated: Jan 13, 2026

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Enhancing Fat Graft Survival with Poly-L-Lactic Acid: An Experimental Study in Wistar Rats.

Balduino Ferreira de Menezes Neto1, Natália Parenti Bicudo2, Hélio Amante Miot3

  • 1Department of Plastic and Reconstructive Surgery, Botucatu Medical School, São Paulo State University, Rua General Telles, 1396, Apt 41, Botucatu, São Paulo, CEP 18602-120, Brazil. balduino.neto@unesp.br.

Aesthetic Plastic Surgery
|January 6, 2026
PubMed
Summary

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This summary is machine-generated.

Adding poly-L-lactic acid (PLLA) to fragmented fat grafts in rats improved fat retention and reduced inflammation and necrosis. This suggests PLLA enhances fat graft integration for better outcomes.

Area of Science:

  • Regenerative Medicine
  • Biomaterials Science
  • Plastic Surgery Research

Background:

  • Autologous fat grafting is debated due to variable absorption and integration.
  • Optimizing fat graft techniques is crucial for predictable clinical results.

Purpose of the Study:

  • To evaluate the effect of poly-L-lactic acid (PLLA) on fragmented autologous fat grafts.
  • To assess PLLA's impact on fat graft survival, inflammation, and necrosis in a rat model.

Main Methods:

  • Fragmented fat grafts were implanted into Wistar rats, with one group receiving PLLA mixed with fat.
  • Grafts were analyzed over 150 days for volume, necrosis, fibrosis, and inflammation.
  • Comparison between fat-only grafts and fat-PLLA composite grafts.
Keywords:
Dermal fillersFatGraft survivalLiposuctionPoly-L-lactic acidRats

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Main Results:

  • PLLA-enhanced fat grafts showed significantly reduced inflammation and necrosis (p < 0.05).
  • Superior volume retention was observed in the PLLA group compared to fat grafts alone.
  • No significant differences were found between different volumes of fat grafts without PLLA.

Conclusions:

  • Poly-L-lactic acid (PLLA) incorporation improves the survival and integration of fragmented fat grafts.
  • PLLA reduces adverse inflammatory and necrotic responses in fat grafting.
  • This biomaterial shows promise for enhancing autologous fat graft efficacy.