INFINITY Occipitocervical Upper Thoracic System, MULTI AXIAL SCREW, Size: 4.0mm x 24mm, REF 3604024; for immobilization and stabilization of spinal segment as an adjunct to fusion for the following acute and chronic instabilities of the craniocervical unction, the cervical spine (C1 to C7), and the thoracic spine from T1-T3.
Incorrect type of titanium was used which reduces the gripping strength of the screw head of 5 batches of Infinity Multi-Axial Screws
Worldwide distribution - US Nationwide and the country of Canada.
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-1409-2023