There was no known reported patient involvement associated with the complained event.Device is an instrument and is not implanted/explanted.(b)(6).A device history record (dhr) review was performed for part # 03.010.103, lot # 8901258: manufacturing location: (b)(4), manufacturing date: 01.April 2014: no non-conformance reports (ncrs) were generated during production.Review of the device history record(s) showed that there were no issues during the manufacture of the product that would contribute to this complaint condition.A product investigation was performed.We have received a drill bit (part # 03.010.103, lot # 8901258) for investigation.The visual inspection has shown that approximately 9 mm from the fluted tip section is broken off.The broken tip was not returned for evaluation.Additionally, it is clearly visible that the cutting edges are worn out and strongly damaged.There were no other damages or signs of misuse detected.The used material was stainless steel (b)(4) as required.The measurements of the hardness after the hardening procedure were within the required specification.Based on these findings we exclude any manufacturing related issue.Outer diameter of the device was measured per relevant drawing and was within the required specifications.Based on the provided information we are not able to determine the exact cause which has led to this breakage.We only can assume that a mechanical overloading situation, for example metallic contact or lateral stress, has caused the breakage.No product fault could be detected.Device was used for treatment, not diagnosis.If information is obtained that was not available for the initial medwatch, a follow-up medwatch will be filed as appropriate.
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