Visual evaluation of the returned provisional articular surface found that it cleanly fractured into two pieces along an antero-posterior line through one of the condylar surfaces.Several nicks, gouges and scratches can be observed all over both the superior and inferior surfaces.Dimensional evaluation found that both the height and antero-posterior width are within print specifications.The device history records were reviewed with no deviations/ anomalies identified.This device is used for treatment.A product history search identified no other complaint for the part and lot combination of the articular surface.Per the warnings section of the package insert, users are instructed not to subject instruments to high loads and/or impact as breakage can occur.The breakage problem was caused by hammering the device, which is instructed against.Therefore, user error is considered to be the root cause.
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