Implantable tissue scaffold

An implantable tissue scaffold for closing a wound defect comprising:

• a central rod having a central longitudinal axis;
• an upper plate including an upper section, a lower section disposed below the upper section, and a middle section attached to the central rod and connecting the upper and lower sections, the upper, middle and lower sections collectively at least partially circumscribing the central rod, the middle section being a helical section that at least partially circumscribes the central rod, the upper plate having a first end and an opposite second end that is each connected to the central rod, the upper section having a first bottom surface and the lower section having a second bottom surface located below the first bottom surface;
• and
• a lower plate spaced-apart from the upper plate, the lower plate including an upper section, a lower section disposed below the upper section of the lower plate, and a middle section attached to the central rod and connecting the upper and lower sections of the lower plate, the upper, middle and lower sections of the lower plate collectively at least partially circumscribing the central rod, the middle section of the lower plate being a helical section that at least partially circumscribes the central rod, the lower plate having a first end and an opposite second end that is each connected to the central rod, the upper section of the lower plate having a first top surface and the lower section of the lower plate having a second top surface located below the first top surface, the first top surface facing the first bottom surface, the second top surface facing the second bottom surface;
• and
• the central rod, upper plate and lower plate comprising a single unitary piece made of a biodegradable material.