光热治疗
脚手架
光热效应
材料科学
生物医学工程
体内
纳米技术
生物物理学
医学
生物
生物技术
作者
Yanliang Zhao,Huifang Kang,Yuhao Xia,Lingshun Sun,Feng Li,Hongyue Dai
标识
DOI:10.1002/adhm.202302879
摘要
Abstract Bone infection is one of the most devastating orthopedic outcomes, and overuse of antibiotics may cause drug‐resistance problems. Photothermal therapy(PTT) is a promising antibiotic‐free strategy for treating infected bone defects. Considering the damage to normal tissues and cells caused by high‐temperature conditions in PTT, this study combines the antibacterial property of Cu to construct a multi‐functional Cu 2 O@MXene/alpha‐tricalcium phosphate (α‐TCP) scaffold support with internal and external sandwiching through 3D printing technology. On the “outside”, the excellent photothermal property of Ti 3 C 2 MXene is used to carry out the programmed temperature control by the active regulation of 808 nm near‐infrared (NIR) light. On the “inside”, endogenous Cu ions gradually release and the release accumulates within the safe dose range. Specifically, programmed temperature control includes brief PTT to rapidly kill early bacteria and periodic low photothermal stimulation to promote bone tissue growth, which reduces damage to healthy cells and tissues. Meanwhile, Cu ions are gradually released from the scaffold over a long period of time, strengthening the antibacterial effect of early PTT, and promoting angiogenesis to improve the repair effect. PTT combined with Cu can deliver a new idea forinfected bone defects through in vitro and vivo application.
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