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This report is being submitted to relay additional information and device evaluation.The following sections are being reported: h6: type of investigation codes were added: 4110, 4109, 4111 and 3331.H6: investigation findings code was added: 180.H6: investigation conclusions code was added: 4307.One (1) impl twist mp-1 5.0 mm 10 mm (1994) was returned for investigation.Visual evaluation of the as returned product identified damage threads at bottom of healing cap.Based on the evaluation, device malfunction has occurred.However, there is no existing nonconformance / capa / hhe/d / ie / product hold against the reported device that did or could cause or contribute to the reported event.Monthly post market trending review identified no adverse trends or actionable trends for the reported event or device.Zimmer biomet quality management system (qms) has controls in place to ensure the distribution of conforming product.Therefore, based on the available information, the product was within specifications and conforming when it left zimmer biomet.Dhr review was completed for the subject lot number (2019072563).It was confirmed that all operations and inspections were executed as per applicable procedure.No deviations or non-conformances, which could have caused or contributed to the reported event, were noted as part of the dhr.Lot was inspected and passed all acceptance criteria by qa.Complaint history review was performed for the reported lot number (2019072563) for similar events and no other complaint was identified.Review completed utilizing keywords: fit : does not seat.Functional testing to recreate the reported event was performed - the healing cap could not thread fully into the implant which engaged as normal with in-house healing cap.A definitive root cause could not be determined.However, based on the investigation, risk review and ifu, the most likely causes determined from the investigation are improper techniques used during placement - implant not placed properly & mechanical failure.No further investigation or immediate capa / hhe/d escalation is required, as the complaint investigation did not confirm the product was nonconforming at the time of distribution, and no new failure mode, harm, or hazardous situation was identified through the investigation performed.
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