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Based on the reported event and returned device, it is hypothesized that an excessive impaction force was applied to the installer during use, potentially resulting in a torsional or off-axis asymmetric load (e.G., rocking or toggling) being applied to the distal tip of the installer.This may have led to a mechanical failure of the tang.As expandable spacer installers are not designed to withstand excessive torsional or off-axis loads, an insertion force applied at an angle could have caused failure at the distal tip.
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