Abstract: The present invention is directed to porous or textured embolization devices which are capable of being delivered to the situs of a vascular dysfunction through a delivery device. One embodiment of the embolization device comprises, in general, a resilient material thread having a first relaxed shape and a second stretched shape, wherein the first relaxed shape forms a space-filling body, and wherein the second stretched shape forms a linear body, and one or more surface irregularities formed on the material thread. In one embodiment, the one or more surface irregularities formed on the material thread may provide a porous material thread and encourage tissue in-growth. In another embodiment, the one or more surface irregularities formed on the material thread may provide a textured material thread capable of promoting tissue in-growth.