It was reported to (b)(4) that an x-ray unit (preva intraoral dental x-ray system, serial no.(b)(4)) separated from its wall mount in a user facility.No injuries were reported.Root cause was determined to be installation error due to the mounting bolt not properly engaging with the wall stud.The bolt had been inserted at an angle that made it enter into the side of the stud, rather than the center.As a result, the unit began to lean downward but did not completely separate.This mdr is being submitted as part of retrospective complaint review conducted at (b)(4) corporation ((b)(6)).(b)(4) (formerly progeny) began filing mdrs for x-ray units separating from their wall mounts in (b)(6) 2009 (refer to mdr 1423380-2009-00006).All subsequent incidents involving units fully separating from the wall mount have been submitted to cdrh as mdrs.As part of retrospective complaint review, (b)(4) has identified this unreported incident that occurred subsequent to (b)(6) 2009 and has decided to report this incident for consistency.At the time of the incident, it was assessed to be non-reportable because of partial separation (the unit was leaning downward, but did not completely separate), and is now considered reportable according to current (b)(4) procedures.
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