<unk>  (placebo surgery) is a faked surgical intervention that omits the step thought to be therapeutically necessary. In clinical trials of surgical interventions,<unk>  is an important scientific control. This is because it isolates the specific effects of the treatment as opposed to the incidental effects caused by anesthesia, the incisional trauma, pre- and postoperative care, and the patient's perception of having had a regular operation. Thus<unk>  serves an analogous purpose to placebo drugs, neutralizing biases such as the placebo effect.
Sham surgery
Bloodless surgery
Prosection
Infiltration analgesia
Multifocal technique
Skin window technique
Microchip implant 
Surgical mesh