(b)(4).Complaint sample was evaluated and the reported event was confirmed.Bearing and ringlock with out the tray are returned for evaluation.Visual inspection showed that the bearing was damaged at the lip and slot possibly due to the bent ring lock.Device history record (dhr) was reviewed and no discrepancies were found.A definite root cause cannot be determined with the information provided.(b)(4).Concomitant medical products: ep-115393, e1 44-36 std hmrl brng, lot 536010; 010000589, comp rvrs 25mm bsplt ha+adptr, 163320; 110004347, sig glen ct gd/bone model set, 474650; 113615, comp primary stem 15mm micro, 595350; 115310, comp rvrs shldr glnsp std 36mm, 837030; 115395, comp rvs cntrl 6.5x25mm st/rst, 043200; 180550, comp lk scr 3.5hex 4.75x15 st, 426330; 180551, comp lk scr 3.5hex 4.75x20 st, 220010; 180552, comp lk scr 3.5hex 4.75x25 st, 603170; 406669, stn pn thd tip.125x2.5in 2pk, 222510; 106021, ringloc+ replacement ring sz21, 684250.Event occurred in (b)(6).Multiple mdr reports were filed for this event, please see associated reports: 0001825034-2018-09288.
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It was reported that during a primary comprehensive reverse shoulder procedure, the poly liner failed to seat into the humeral tray.Final seating did not result in the ring-lock mechanism correctly locking.The procedure was completed with a new liner.Resultant construct was tighter than ideal, and extra bone removal was required to prevent impingement.Attempts have been made and no further information has been provided.
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