A brief visual and functional check prior to the repair showed that the head of the instrument had a dent.This dent caused the push button to stick in causing high friction and hence heat up.To avoid such issues the user instruction contains already several notes, warnings and requests how to prepare the handpiece for each treatment: warning: hazards for the care provider and the patient.Damage, irregular noise during operation, excessive vibration, unusual build-up of heat or if the cutter or grinder cannot be firmly held.Stop work and seek service support.Caution: burning hazard from hot instrument head and instruments cover.If the instrument overheats, burns may arise in the oral area.Never contact soft tissue with the instrument head.(b)(4).
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When it was finally possible to reach the dental office, it was stated that the original comment, that the handpiece caused a burn during a treatment, was a mistake.Their documentation does not indicate any adverse event associated with this handpiece.
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