Analysis of the returned device indicated that the inner assembly would spin freely by hand.When viewed under magnification, there was damage to the hubs that is consistent with improper loading: dimples on the front hub prior to the locking area caused by the handpiece locking mechanism; locking area deformation caused by the back side of the front collet of the handpiece; and deformation of the inner hub chevrons caused by the handpiece drive mechanism.There were no loose components.Even with the deformation of the hubs, functionally, the bur loaded securely into a handpiece, ran at 12,000 rpm in forward mode, and cut saw bone with no issues.There was no breakage of the bur.There was an out of specification condition identified as it relates to the complaint (due to physical damage).If information is provided in the future, a supplemental report will be issued.
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