In recent years, ۳D and
۴D bioprinting has emerged as a new revolution in tissue engineering. This technology offers innovative solutions to complex medical challenges, especially wound healing. One is the ability to design and create personalized bio-scaffolds that support tissue regeneration. Due to its importance, this technology has become the main focus of today's
tissue engineering and regenerative medicine research. An appealing approach in this field involves integrating ۳D printing technology with advanced materials that can respond to environmental stimuli, known as ۴D printing technology. With this approach, constructs are created that can dynamically react to the environmental conditions of the wound. Responsive materials, also known as smart materials, are sensitive to environmental changes such as temperature, pH, or mechanical stress. In the context of wound healing, these structures are designed and programmed to release therapeutic or biological factors, change structure, or undergo controlled destruction under specific environmental conditions. This dynamism and adaptability of these structures provide the potential for targeted support during different phases of wound healing, resulting in more effective tissue regeneration. In addition, along with this technology, researchers utilize precise ۳D modeling techniques to create structures with unique characteristics in terms of porosity, mechanical strength, and surface performance. This is essential for developing optimal biological characteristics, such as proper cell attachment, proliferation, and differentiation, to facilitate effective wound healing. Somehow, scientists combine computational models with experimental tests to design structures that can meet the specific needs of a patient or a particular wound. This represents a significant advancement in personalized medicine. Responsive printed structures, unlike traditional structures, are actively sensitive to the physiological conditions of the wound site, and in this way, in addition to speeding up wound healing, they also reduce the possibility of some complications such as infection and scarring. In conclusion, a new generation of bio-constructs has been created by integrating ۳D printing technology with smart materials that respond to environmental conditions, revolutionizing wound healing.
