The device used for treatment was returned for evaluation.
Nothing was identified visually that contributed to the reported problem.
A functional evaluation was attempted and the reported problem was confirmed.
The handpiece was sterilized, then the handpiece characterization test was performed twice, where both t1 torque values were 98.
The motor could not be manually turned.
These torque values indicate the motor is not functioning properly.
A review of manufacturing and service records indicate the device met all specifications upon release into distribution.
A complaint history review for similar reported/confirmed complaints associated with the handpiece and failure mode(s) "jamming/seizing" identified similar events.
The most likely cause of this event is motor failure.
When the handpiece homes, it wants to move the burr to the calibration wall.
However, because of the motor failure, the handpiece could not extend and retract the burr which caused the homing failure.
Further investigation into the reported failure is being conducted to determine if additional actions are required.
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