After the reported incident of the tubehead becoming dislodged from the scissor arm, the device was removed from the doctor's office and the scissor arm was scrapped by the device dealer in (b)(4).The tubehead was returned from the dealer in (b)(4) to the manufacturer for evaluation; however, both the yoke and pivot joint components (both part of the device scissor arm) are needed to determine a root cause of the failure.The device history record was reviewed and did not contain any evidence pointing to the unit's failure and no issues were identified in the final or in-process inspections that were related to or that could affect the reported failure.This concludes our investigation.
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