The 6.0mm reamers are robust instruments that are powered by a medical grade type drill unit which can generate sufficient torque to allow the reamer to trim bone material.If the user encounters significant resistance during the reaming process, this can sometimes overtorque the reamer and cause it to break.It is believed that this may have been the cause of this event.Because the reamer material is radiopaque, the portion that broke free of the reamer could be seen under flouro and was removed with tonsil forceps without delaying the procedure.
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On (b)(6) 2020, during an implant case involving both proximal humerus, as well as a distal humerus implant, the 6.0 reamer, ct-0225, broke in two places during the reaming process of the distal implant.The approach was standard for a distal humerus case through the lateral condyle using both the solid starting awl followed by the 8mm curved cannulated awl.There was a bit of a cortical bone lip just distal to the tumor section in the distal 1/3 of the humerus that caused initial resistance with the guidewire, and was a point of resistance for our stiffer reamers.Following the two separate breaks of the reamer, a fragment remained in the patient that needed to be removed with a pair of tonsils without challenge.Through a combination of use of various reamers from both the humerus and delivery set, it was noted that our stiffer reamers kept hanging up on cortical bone lip.The same was not the case for our more flexible reamers.After reaming to 8.0mm the rest of the case was unremarkable, and the patient was implanted with a 17x180mm implant distally, and a 22/13x160 implant proximally.Not patient complications resulted from the broken reamer.
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