|
The surgeon submitted a case series of dynabunion system.The anti-drift blot has backed out as shown in the 6-week x-ray.The screw head prominent above the plate.The patient was asymptomatic and revision surgery was not scheduled at the time of the report.The surgeon reported at a later date that the anti-drift bolt was removed.The patient is fused and walking well after the removal.Lot history records (lhr's) of the plate was reviewed.Non-conformance was not identified based on the lots that would contribute to this failure mode.Potentially, force from weight-bearing with normal walking motion caused the screw to back-out.Screw back-out is a known failure mode of screws.Refer to lot number below for additional components of the construct.Only the anti-drift bolt was removed.Ref: 7100-lp18-l, ln: 501121, qty: 1, product name: dynabunion left plate 18mm.Ref: 7118-1814kt, ln: 300280, qty: 1, product name: 18x18x14mm himax clip.Ref: 15lp-3532, ln: 501164, qty: 1, product name: dynabunion antidrift bolt 32mm.Ref: 15nl-3020, ln: 400142, qty: 1, product name: 20mmx3.0mm screw.Ref: 7118-1814kt, ln: 400148, qty: 1, product name: 16mm x 3.5mm screw.Ref: 1500-3526, ln: 400049, qty: 1, product name: 26mm x 3.5mm screw.
|