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Combined clinical and radiographic data led to 20 designations of complete healing, 2 designations of reductive healing, and 2 failures (91.7% success rate). Considered alone, radiographic criteria for complete healing were met for 20 cases, reductive healing for 3 cases, and radiographic failure for 1 case. This limited retrospective outcomes assessment is an early indication that TEMS-guided trephine bur root-end resection leads to similar success as is established for freehand carbide and diamond bur resection. Controlled clinical trial