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The reported event could not be confirmed since the device was not returned for evaluation and no other evidence were provided.Upon further investigation by the prophecy team the following was noted: the ct scan was processed within normal, acceptable ranges.No errors were identified during the segmentation procedure.The alignment guides were designed within normal, acceptable ranges.No abnormalities in the internal process were found.The engineering drawings and quality documents were processed within normal, acceptable ranges.No abnormalities in the internal process were found.The candidate for prophecy invision email was sent by the prophecy team because the initial case99411 was created under infinity technology and the patient presented existing implants, then the initial case was switched to invision technology.In the email communication, it was mentioned that because of the complexity of prophecy invision cases, the lead time is currently 5 weeks from the case creation date, but the actual lead time for cases from canada is 6 weeks.Nevertheless, between the case creation date (29-may-2024) and the date of surgery set by the sales representative/surgeon ((b)(6) 2024) there was 8 weeks.As an internal prophecy procedure, the invision surgery date was set to match the surgery date from the initial case99411
((b)(6) 2024).According to prophecy protocol, the scans are acceptable when they are used within a 6 month-range between scan date and surgery date.In order to use scans older than 6 months, a surgeon approval is required.In conclusion, there is a significant probability that the duration of time waiting for the prophecy guides mentioned in the incident information did not impact the fit between guides and bone surface.It was not possible to identify what caused the prophecy guides inaccuracy mentioned in the complaint¿s email.A potential root cause may be a discrepancy in user expectations vs guide fit and feel during surgery or user error during surgery.An improvement in the communication to the field was implemented clarifying that the surgery date of the subsequent case created under invision technology will be the same to the initial case created under a different technology.More detailed information about the complaint event as well as the affected device must be available in order to determine the root cause of the complaint event.A review of the device history for the reported lot did not indicate any abnormalities.No corrective actions are required at this time.A review of the labeling did not indicate any abnormalities.No indications of material, manufacturing or design related problems were found during the investigation.If more information is provided, the case will be re-assessed.
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