We modified a nylon mesh with a pore size of 100 µm (Lythe Official, Whitby YO21 3RT, UK) by adding a frame of a biocompatible 3D printing resin (SolusArt v3.0, Gesswein, USA) following a customised fabrication process using a Digital Light Processing 3D printer (DLP, Microlay, Versus 385 nm, Spain). We cut a sheet of the nylon mesh with the size of the 3D printer build platform and taped it with special double-side adhesive tape (No.99786, 3M, USA) of 1cm width and 0.3 mm thickness on the four edges of the Building Platform. We cured the 3D resin layer by layer following the CAD design of a ring of 6 mm outer diameter and 5.5 mm internal diameter, resulting in an embedded nylon mesh inside a rigid ring-shaped frame formed by the cured 3D resin. We show the mesh itself in Fig. .