Based on the information provided, review of the surgical technique manual, ifu, certificates of analysis and fmeas, there is no indication of device failure and no indication that the device was out of specification.The most probable root cause is user error: improper implant size selection, using an implant that was too long.
Event or Problem Description
The patient had left side si joint arthrodesis in (b)(6) 2019 where three implants were installed.The patient later complained of left-side radicular pain.The surgeon determined that the most superior positioned implant was impinging on the s1 neuroforamen.In (b)(6) 2019, the surgeon performed a revision procedure where he removed the superior positioned implant using chisels and replaced it with a shorter implant of the same type.The status of the patient following the revision procedure is not known.