Handheld 3D skin printer: two minutes to repair deep wounds

Release date: 2018-05-08

Science and Technology Daily, Beijing, May 7 (Reporter Fang Linlin) The physicist organization network reported on the 7th that researchers at the University of Toronto in Canada have developed a handheld portable 3D skin printer that can print multiple layers of skin tissue to cover and Heal a deep wound. This is the first device that can form, accumulate and coagulate skin tissue in situ in two minutes or less, and is a new breakthrough in bioprinting technology.

The epidermis, dermis, and subcutaneous tissue of deep wounds can be severely damaged. The currently preferred treatment is stratified-thickness skin grafting, which transplants healthy donor skin onto the epidermis and part of the dermis.

A stratified thickness graft on a large wound requires all three layers of tissue from healthy donor skin, so that there are few qualified skin donors. Unacceptable skin donors can result in incomplete coverage of the wound area, resulting in poor healing.

Although scientists have developed a large number of tissue engineered skin substitutes, they have not been widely used in the clinic. Currently, most 3D bioprinters are bulky, slow, expensive, and most importantly not suitable for clinical applications. The research team believes that the in-situ skin printer they invented is a platform technology that overcomes these obstacles while improving the skin healing process.

The handheld skin printer is similar to a white tape dispenser. The "bio-ink" consists of protein-based biomaterials, including the most abundant collagen in the dermis, protein fibers involved in wound healing, etc. Each "tape" extends. The device is only the size of a shoe box and weighs less than one kilogram. It also simplifies the use of traditional bioprinters and greatly reduces the amount of operational training required.

Now, the research team plans to add some features to the printer, including expanding the area that can cover the wound. They hope to conduct more human clinical trials with a view to eventually revolutionizing burn care technology.

Source: Technology Daily

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