Follicular Unit Extraction: Evolution of a Technology

Comparison of tissue loss by different punches: A new A‐design

“…The lower the speed, the wider would be the wound due to increased frictional force. The “torque” is another factor . As described by Cole et al, torque results from the motor horsepower and the speed:…”

“…The "torque" is another factor. 8 Torque is in the form of a twist. 13 It produces a force at the peripheral part of the punch.…”

“…4,5 The clinical studies documented in literature have emphasized on the transection rates of different punches and machines. [6][7][8][9] These different punches have different kinds of impact on the donor area in terms of removal of the skin/tissue. The "torque" is one of the major factors (it is the rotation force on the hair entangled within the lumen of the punch).…”

“…The "torque" is one of the major factors (it is the rotation force on the hair entangled within the lumen of the punch). 8,10 None of the study to date has mentioned the impact of different punches in terms of skin/tissue loss and scar formation. It can be postulated form the study by Rose, the inter-hair distance will remain the same regardless of the size of the punch or the amount of skin/tissue removed.…”

Battle of the punches: Comparison of transection rates of different punches during FUE

“…The use of robot in hair restoration has opened new dimensions in donor hair harvesting. The documented clinical studies emphasize on the grafts/hair harvesting and the transection rates of the different punches and machines . The results are more or less anecdotal.…”