Humanoids are robots created with human forms or characteristics; these robots also have the potential to seamlessly interact with human beings. By replicating the appearances and functions (e.g., self-healing) of human beings, humanoids have the potential to establish more harmonic and natural human-robot interactions. Here, we propose the use of skin equivalent, a living skin model consisting of cells and extracellular matrix, as a human-like and self-healing coverage material for robots. We fabricated a three-joint robotic finger covered with skin equivalent by developing a method to cover three-dimensional objects with skin equivalent. Furthermore, inspired by the medical treatment of deeply burned skin using grafted hydrogels, we demonstrated wound repair of a dermis equivalent covering a robotic finger by culturing the wounded tissue grafted with a collagen sheet. With the above results, this research shows the potential of using skin equivalent as human-like and self-healing coverage material for robots.

类人机器人是具有人类形态或特征的机器人；这些机器人还具有与人类无缝交互的潜力。通过复制人类的外观和功能（例如，自我修复），类人机器人有可能建立更和谐、更自然的人机交互。在这里，我们建议使用皮肤等效物，一种由细胞和细胞外基质组成的活体皮肤模型，作为机器人的类人自我修复覆盖材料。我们通过开发一种用皮肤等价物覆盖三维物体的方法，制造了一个用皮肤等价物覆盖的三关节机器人手指。此外，受到使用接枝水凝胶治疗深度烧伤皮肤的启发，我们通过培养移植有胶原蛋白片的受伤组织，展示了覆盖机器人手指的真皮等效物的伤口修复。有了上述结果，这项研究显示了使用皮肤等效物作为机器人的类人自我修复覆盖材料的潜力。