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Updated: May 5, 2026

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Multifunctional Shape-Memory Polyurethane/MnO2 Composites for Postsurgical Osteosarcoma Adaptive Treatment.

Deju Gao1,2, Yuhan Du1,2, Junjie Deng1

  • 1Centre for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.

Materials (Basel, Switzerland)
|May 4, 2026
PubMed
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This summary is machine-generated.

A novel shape-memory polyurethane/manganese dioxide composite offers adaptive support for bone defects. This material exhibits antitumor properties and promotes bone regeneration, addressing key challenges in osteosarcoma treatment.

Area of Science:

  • Biomaterials Science
  • Orthopedic Oncology
  • Nanotechnology

Background:

  • Postsurgical osteosarcoma treatment faces challenges with conventional implants, including irregular bone defects, residual tumor cells, and delayed bone regeneration.
  • There is a need for advanced materials that can provide adaptive support, eliminate tumor cells, and promote bone healing.

Purpose of the Study:

  • To develop and characterize a multifunctional shape-memory polyurethane (SMPU)/manganese dioxide (MnO2) composite for treating postsurgical osteosarcoma.
  • To evaluate the composite's adaptive support, antitumor activity, and osteogenic bioactivity.

Main Methods:

  • SMPU was synthesized using 1,4-butanediol (BDO) and dimethylolpropionic acid (DMPA).
  • Commercial MnO2 nanoparticles were incorporated into the SMPU matrix.
Keywords:
MnO2adaptiveantitumor effectsbone regenerationshape-memory polyurethane

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  • The influence of MnO2 content on mechanical performance, shape-memory behavior, photothermal properties, and biocompatibility was investigated.
  • In vitro studies assessed the composite's efficacy in eliminating tumor cells and promoting osteogenic differentiation of human bone marrow-derived mesenchymal stem cells (hBMSCs).

    • Main Results:

    • The SMPU/MnO2 composites demonstrated robust mechanical performance, good shape-memory behavior, and controllable Mn2+ release.
    • Tunable photothermal performance under near-infrared (NIR) irradiation was achieved.
    • Composites with 4 wt% MnO2 effectively eliminated tumor cells via photothermal effects and promoted osteogenic differentiation of hBMSCs.
    • Optimizing MnO2 content was crucial, as excessive amounts compromised biocompatibility.

    Conclusions:

    • The developed SMPU/MnO2 composite offers a promising multifunctional solution for treating irregular bone defects after bone tumor surgery.
    • The material provides adaptive support, exhibits antitumor effects through photothermal therapy, and enhances bone regeneration.
    • This composite addresses critical limitations of conventional implants in complex orthopedic oncology cases.