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Bio-Design and Manufacturing  2025 Vol.8 No.5 P.709-723

http://doi.org/10.1631/bdm.2400486


Evaluation of the 3D printable temperature-responsive shape-memory PLTG terpolymers for minimally invasive surgery


Author(s):  Xulin Hu (???), Jun Wang (??), Shuhao Yang (???), Jun Deng (??), Wanyue Feng (???), Haoming Wu (???), Dongdong Han (???), Leilei Qin (???), Jianye Yang (???), Zhengguang Pu (???), Xin Yong (??), Yanlin Li (???), Shuai Li (??) & Ning Hu (??)

Affiliation(s):  Clinical Medical College and Affiliated Hospital of Chengdu University, Chengdu 610081, China; more

Corresponding email(s):   huxulin1993@163.com, allenle1991@sina.com, huncqjoint@yeah.net

Key Words:  Biodegradable polymers Shape-memory polymers 3D printing technology Biocompatibility Tissue engi neering applications


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Xulin Hu (???), Jun Wang (??), Shuhao Yang (???), Jun Deng (??), Wanyue Feng (???), Haoming Wu (???), Dongdong Han (???), Leilei Qin (???), Jianye Yang (???), Zhengguang Pu (???), Xin Yong (??), Yanlin Li (???), Shuai Li (??) & Ning Hu (??). Evaluation of the 3D printable temperature-responsive shape-memory PLTG terpolymers for minimally invasive surgery[J]. Journal of Zhejiang University Science D, 2025, 8(5): 709-723.

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Abstract: 
Three-dimensional (3D) printing has revolutionized the design and production of customized scaffolds, but the minimally in vasive implantation of 3D-printed structures into the human body remains challenging. This has prompted the exploration of innovative materials and technical solutions. Shape-memory polymers, as advanced intelligent materials, exhibit considerable potential in minimally invasive surgical applications. Herein, we developed a novel thermosetting shape-memory polymer, poly(L-lactic acid)-trimethylene carbonate-glycolic acid (PLLA-TMC-GA), for the fabrication of bioengineered scaffolds with body temperature-activated shape-memory functionality. We comprehensively evaluated the mechanical properties, thermal stability, shape-memory capabilities, biocompatibility, biodegradability, and 3D printing performance of PLLA-TMC-GA terpolymers with various compositions. The results indicate that PLLA-TMC-GA exhibits exceptional shape-memory perfor mance, adjustable material properties, favorable biocompatibility, and the potential for controlled biodegradation and reab sorption. The use of PLLA-TMC-GA as a biodegradable shape-memory polymer allows the reduction of implant volume, simplifies implantation, and enables on-demand activation at body temperature. These characteristics present new opportuni ties for the advancement of minimally invasive surgical techniques.

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