It was reported that, patient underwent bilateral thr ((b)(6) 2011).Underwent revision of right side ((b)(6) 2014) for failed ceramic liner noted after felt unusual movement while playing tennis and, while not apparent on x-rays, was confirmed by arthrogram ct.The fractured liner was replaced with smith & nephew back up devices.It is unknown if there was a surgical delay.No other complications where reported.All available information has been disclosed.If additional information should become available, a supplemental report will be submitted accordingly.
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H3, h6: the associated device was returned and evaluated.The lab analysis concluded that the intact 36mm forte ceramic head shows signs of titanium transfer on the articulating surface.This transfer could have been cause by having femoral head contacting the edge of the acetabular shell or the compressive ring on the liner.The ceramic liner fractured below the distal end of the compressive ring.To have a clear image of the fractured surface, the part was sputter gold coated for sem observation.The images provided from the fractured surface indicating the slow fracture with beach marks could have initiated.Most of the fractured surfaces are smooth with little to no features (fast fracture rate).The cause of the ceramic liner fracture could not be determined with certainty.The clinical/medical evaluation concluded that this case reported via medwatch, states that a biolox ceramic head and r3 liner were revised on the right hip approximately 2 and a half years post implantation, after an unusual movement was noted while playing tennis.The fractured liner was reported to be confirmed by arthrogram ct, but not apparent on x-rays.The requested medical/surgical records and radiographs have not been provided.Therefore, the patient impact beyond the revision, and the clinical root cause of the fracture cannot be determined.Due to the lack of information provided, a clinical assessment cannot be rendered.Should additional clinically relevant documentation become available, the clinical/medical task may be re-opened.A review of complaint history revealed similar events for the listed batch, this failure mode will be monitored for future complaints for any necessary corrective actions.A review of the manufacturing records did not reveal a manufacturing abnormality that could have caused or contributed to the reported incident.At this time, we do not have reason to suspect that the product failed to meet any product specifications at the time of manufacture.A review of the risk management file and instructions for use documents revealed this failure mode was previously identified.The anticipated risk level is still adequate.Assessment of historical escalated cases concluded that there are no prior actions related to this device and failure mode.A contribution of the device to the reported event could be corroborated as the device shows signs of damage/wear.Possible causes could include but not limited to traumatic injury, patient anatomy or abnormal loading of limb.Based on this investigation, the need for corrective action is not indicated.Should additional information be received, the complaint will be reopened.No further investigation is warranted for this complaint; however, we will continue to monitor future complaints and investigate as necessary.We consider this investigation closed.
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