Clinical evaluation performed by medical affairs department intraprosthetic dislocation 1 month after the partial hip prosthesis surgery in a 85 year old patient.Dislocation of the head from the bipolar cup is normally prevented by the retention mechanism.Technical analysis of the implant might reveal if a defect was present in said mechanism; to date we have no evidence of such situation.Conditions that may cause intra prosthetic dislocation in a well functioning bipolar cup are difficult to reproduce.With information at hand we are unable to draw any definitive conclusion.Batch review performed on (b)(6) 2022: lot 2103619: 12 items manufactured and released on (b)(6) 2021.Expiration date: (b)(6) 2026.No anomalies found related to the problem.To date, 4 items of the same lot have been sold without any similar reported event.Other device involved: ball heads: cocr 01.25.013 cocr ball head 12/14 ø 28 size l +3.5, (k072857), lot.2107132: 100 items manufactured and released on (b)(6) 2021.Expiration date: (b)(6) 2026.No anomalies found related to the problem.To date, 25 items of the same lot have been sold without any similar reported event.
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