A distal portion of a filament (126B, 126C) is extended beyond the distal end of a needle (101) with a gripper (111). The needle with the extended filament is inserted into a cannula (230) with snagging points (231) at the distal opening of the cannula in tissue. The snagging points of the cannula hook and retain the distal portion of the filament. During partial withdrawal of the needle, a section of filament is deposited in the lumen of the cannula between the distal ends of the needle and cannula. When the needle is re-advanced, the section of filament is expelled or pushed out of the cannula into tissue. The needle is then rotated the gripper engages and spirals the expelled filament, burrowing into tissue. The needle can further advanced to push and pack the spiral of filament deep into the tissue. The knotlike filament spiral (126) is individually formed by rotation of the needle and friction between the extended filament and tissue. The process of needle partial withdrawal, re-advancement, rotation and pushing is repeated to pack and fill the tissue with interconnecting spirals of filament to prevent migration from tissue. Spiraling of the filament driven by the rotating needle is space seeking, filling, fitting or conforming to fortify, bulk, fill, cushion or repair the tissue. Bulking with filament spirals can repair degenerated disc, urinary incontinence, fecal incontinence or other defective tissue. The filament spirals can also be used as a suture anchor deep within tissue.Selon linvention, une partie distale dun filament (126B, 126C) est étendue au-delà de lextrémité distale dune aiguille (101) avec un élément de saisie (111). Laiguille pourvue du filament étendu est insérée dans une canule (230) de sorte que des points daccrochage (231) soient au niveau de louverture distale de la canule dans le tissu. Les points daccrochage de la canule saccrochent sur la partie distale du filament et maintiennent celle-ci. Pendant un retrait partiel de laiguille, une
