Ablative, non-ablative and fractional: what the words mean
Three distinctions cover almost all the marketing, and understanding them lets you read any quote.
Ablative. The laser removes the upper layers of skin. Carbon dioxide and erbium lasers do this. It gives the largest improvement in lines, scars and texture, and the recovery is the longest: the treated area weeps, crusts and is raw for several days, then pink for weeks to months. Fully ablative treatment of the whole face is powerful and now relatively uncommon because of the downtime and the risks.
Non-ablative. The laser heats the deeper skin without removing the surface. The surface stays intact, so recovery is redness and mild swelling for a day or two. The improvement per session is modest and it builds over a course of three to six treatments. It suits fine lines, early texture change and patients who cannot take downtime.
Fractional. Not a separate depth but a way of delivering either of the above. Instead of treating the whole surface, the beam is split into a grid of tiny columns, so islands of untreated skin remain between them. Those islands drive rapid healing, which is why a fractional ablative treatment recovers in days rather than weeks while still reaching the deeper layers. Fractional ablative is the workhorse of modern resurfacing.
Which treats what.
Fine lines around the mouth and eyes: fractional ablative, or a course of non-ablative for milder cases.
Acne scarring: fractional ablative, usually as a course, and often combined with subcision or other techniques for tethered scars.
Sun damage, mottled pigmentation and rough texture: fractional ablative or a course of non-ablative, with pigment-specific devices for some lesions.
Enlarged pores: fractional, modestly.
Deep static lines: fractional ablative helps, and deep folds need volume or surgery.
Loose skin: not this. Resurfacing tightens slightly and does not lift, and a patient with genuine laxity needs a lift.
Other devices sold alongside. Radiofrequency microneedling delivers heat through fine needles and is a reasonable alternative with different characteristics. Intense pulsed light targets pigment and redness rather than resurfacing. Picosecond and Q-switched lasers target pigment specifically. These are not the same as resurfacing and should not be sold as equivalent.
What to ask. Which device, is it ablative or non-ablative, is it fractional, what depth and density, and how many sessions?
