(b)(4).Implant date: 1994.Concomitant medical products: item #: unknown competitor head lot #: unknown, item #: unknown stem lot #: unknown, item #: unknown cup lot #: unknown.Reported event was unable to be confirmed due to limited information received from the customer.Device history record (dhr) review was unable to be performed as the lot number of the device involved in the event is unknown.Root cause was unable to be determined as the necessary information to adequately investigate the reported event was not provided.The competitor's head was used in conjunction with zimmer biomet liner.This combination is not compatible and would be considered off-label usage.If any further information is found which would change or alter any conclusions or information, a supplemental will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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