See c-(b)(4) eleven shelf cartons of product (b)(4) (65 individual burrs; 10 cartons of 6 and one carton of were returned from lot 50741489.They are all new and unsealed.The product used in the procedure was not returned for evaluation.Definitive conclusions, accurate investigation and evaluation were not definitive without evaluation of physical product.If objective evidence, relevant information, packaging or product becomes available to assist with evaluation, the complaint will be revisited.Factors that may affect device performance include: device ability, surgical ability, procedure location, tissue condition and use per product recommendations.Influences that could compromise product performance or integrity that are unrelated to manufacture include: blade hand piece not fully loaded and or locked into mdu hand set.Incompatible force, torque or leverage applied.Unexpected bone density/condition.Change of approach during use.Insufficient irrigation or engaging the device without suction.Seizing of blades due to inadequate bio matter excision.
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