Punch techniques are useful for icepick scars or other deeply depressed (indented) scars that are smaller than about 3 mm.
Punch excision is used when the base of the scar has normal looking skin and punch excision when the base of the scar does not have normal looking skin.
The Punch Elevation technique is the same as in the video below, except no tissue is excised from the body. After the punch is done, the depressed scar is allowed to float upwards and is then fixed in place with a stitch or a fixating tape.