The event took place during a 2 level pedicle screw construct l3-l5 using midline technique.Two set screw threads sheared during final torque step on the same pedicle screw.L5 screw was where the issue occured.All set screws were placed; the order of final tightenting is unknown.The first failed set screw was removed and replaced with a second set screw.After the second set screw failed, both the pedicle screw and set screw were removed and replaced.The rod reducer was used prior to final tightening the third set screw.The third set screw and second pedicle screw were successful.Sheared material from the set screws were removed with forceps and irrigated with antibiotics.No patient harm and the surgery was completed as intended.Set screw, pedicle screw and torque handle were returned for evaluation.01-80325, (b)(6) set screw (qty 2).01-80169-45r, ie18 pedicle screw.11-80032, eh21 9.5n-m torque handle.
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