Investigation summary: flow: damage.Visual inspection: visual inspection performed at customer quality (cq) identified the upper church spring broke just below when the spring starts to taper off.The broken piece was not returned.No other issues were identified.A device failure was identified.Dimensional inspection: no dimensional inspection was performed due to post-manufacturing damage and device geometry.Document/specification review.The following drawing(s) was reviewed; based on the review of the above drawings, no design issues contributing to relevant complaint condition were identified.Investigation conclusion: no definitive root cause was able to be determined as the circumstances surrounding the complaint are unknown.During the investigation no unidentified product design/manufacturing issues or discrepancies were observed that may have contributed to the complaint condition.Additional monitoring for any potential safety signals will be conducted through complaint trending and other post market safety surveillance activities.Device history lot.A review of the receiving inspection (ri) for the distractor, 5.50mm was conducted identifying that lot number 0804k was released in a single batch.¿ batch1: lot qty of 25 units were released on 2004 with no discrepancies.As a result, the ri identified no issues during the manufacturing and release of this device that could have contributed to the problem reported by the customer.Device history review.Review of the device history record(s) showed that there were no issues during the manufacture of this product, and any sub-components, which would contribute to this complaint condition.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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