Within the evaluation of the handpiece head there was only found some standard wearing regarding the ball bearings.Normal wear for a head manufactured in 2003.But the chuck system was in a good condition.Retention forces completely within specifications.So the complaint with low retention force or lost bur was not comprehensible.Therefore we have to assume that the used bur or tooling was not suitable and not released for our standard chuck system.Unfortunately the dentist does not provide the requested bur or some similar burs to verify this assumption.Ifu contains already following warnings: release of the medical device during treatment.If the head is not properly locked in place, it can fall out during treatment.Do not mount or remove the head while rotating.Before each treatment, check if the head is firmly seated and if the clamping ring is tight.Note: only use carbide cutters or diamond drill bits that respond to iso 1797-1 type 1, are made of steel or hardmetal and meet the following criteria: shaft diameter: 2.334 to 2.35 mm.Overall length: max.22 mm.
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