Sort the scar before you pick the laser
Scar morphology decides everything downstream. Atrophic scars sit below the surrounding skin in three familiar shapes: broad, sloping rolling scars, sharply walled boxcar scars, and narrow ice-pick tracts. The first two are the bread and butter of ablative fractional resurfacing. Ice-pick tracts often aren't. A channel running millimetres down won't fill in because you resurfaced its roof, hence punch excision or TCA CROSS alongside a laser course.
Raised scars are a different animal. Our clinical training notes separate them cleanly: hypertrophic scars appear within a month of injury, stay inside the original wound margins, and may soften over time, while keloids surface weeks to years later, push past those margins, and don't resolve alone. Aggressive ablation on a keloid-prone patient can make things worse. Any lesion that's changing, ulcerating, or undiagnosed needs a dermatologist and possibly a biopsy first.
Timing counts too. The same notes put collagen remodelling in an atrophic scar at twelve to eighteen months, and argue for letting a scar mature first. Our manuals list atrophic acne scars alongside surgical, traumatic and burn scars among the indications for the ultrapulse CO2 platform. Wide brief. One setting won't cover it.
What the 10600 nm beam actually does to tissue
CO2 lasers emit at 10600 nm. Water is the chromophore, and skin is mostly water, so energy lands at the surface and vaporises tissue shallowly. Ultrapulse mode keeps the pulse short and peak power high, gasifying the column before heat spreads sideways.
How short does that pulse need to be? Shorter than most operators assume. Our engineering archive puts the working figures at 20 to 40 micrometres of tissue removed per pulse, ringed by a thermal zone of 40 to 160 micrometres. Past about 100 micrometres of coagulated tissue, healing suffers and visible scarring becomes a live risk, which is why pulse duration stays under a millisecond. Long pulses don't ablate better. They just cook more.
Fractional mode is what changed scar work. Rather than ablating a whole field, the scanner drops an array of microscopic columns and leaves the tissue between them untouched. Those spared bridges carry the healing. Manstein and Anderson's founding 2004 study in Lasers in Surgery and Medicine described treatment zones about 100 micrometres across, penetrating some 300 micrometres, re-epithelialised within a day. Their prototype was non-ablative, yet every fractional platform since borrowed that architecture.
Our device manuals add one detail worth paying for: randomised scanning, so each spot cools before its neighbour fires. Sequential firing stacks heat, and stacked heat in a scar patient buys a complication.
Density, depth, and the downtime you are really selling
Two dials fight each other. Pulse energy sets depth per column: more millijoules, deeper reach into a dermal scar. Density is how many columns land per square centimetre, so it governs surface removed. Push both and you get a stronger result with a longer, oozier recovery. Push neither and you've sold a facial.
Experienced operators go deep and sparse on atrophic scars, not shallow and dense. Deep columns reach the scar; low density leaves enough untreated skin to heal from. Stacking passes carries a physical cost. Epidermis sits near 80 percent water while dermis runs closer to 60, so as the surface dries out, ablation falls away and thermal injury climbs. Our archive is blunt. When treated tissue turns brown and won't wipe clean, stop scanning.
| Parameter | Value | What it controls |
|---|---|---|
| Wavelength | 10600 nm | Water absorption, shallow ablation |
| Pulse energy | 2-200 mJ | Depth of each column |
| Spot density options | 6x6, 12x12, 24x24 spots/cm2 | Column spacing in the scan area |
| Scan area | 0.125 x 0.125 up to 3 x 3 cm | Focal scar work or full-cheek passes |
| Output modes | Ultrapulse, continuous wave, fractional | Ablation, cutting, resurfacing |
| Maximum output power | 30 W | Headroom for deeper passes |
| Scanning | Randomised | Cooling between neighbouring spots |
| Beam delivery | 7-joint articulated arm | Stable beam path, no fibre decay |
Every row above is transcribed from one document, the ultrapulse CO2 fractional laser leaflet in our engineering archive, and it's what we send buyers who ask. None of it is a clinical setting. Settings belong to the physician.
Be honest at consultation. The American Academy of Dermatology tells patients laser treatment can "make a scar less noticeable, but it cannot get rid of a scar". Our archive allows around six months of healing before a second full ablative pass, with improvement continuing up to a year. Fractional courses run tighter. Judge results in months, not weeks.
- Photograph in fixed lighting every visit. Patients forget their baseline. Your camera doesn't.
- Test a small discreet area at low energy first. Our manuals build that into the routine.
- Quote downtime by intensity, not by machine. One device gives a weekend of crusting or a fortnight.
Expect oozing, crusting and pinpoint bleeding in the first days, then redness fading over weeks. Cooling straight afterwards eases pain and swelling. Keep the field clean, hands off the crusts, sun off the face while skin heals. Spreading redness, pain or pus means possible infection and urgent review.
Pigment risk, contraindications, and honest limits
Post-inflammatory hyperpigmentation defines this modality, and Fitzpatrick IV to VI skin carries the higher risk. That's the starting position, not a footnote. A narrative review in Plastic and Reconstructive Surgery Global Open on treating richly pigmented skin goes as far as advising against ablative lasers in darker phototypes, and where energy is used at all it wants lower energy, lower density, fewer passes and proper cooling. A 2023 review in Dermatology Reports pooling published CO2 laser series reported PIH rates varying widely, and linked post-operative topical anti-inflammatory treatment to lower incidence. Its pooled data did not isolate phototype as an independent predictor, which does not override the established higher PIH risk in Fitzpatrick IV to VI. Read it as an argument for controlling inflammation in every patient, not permission to treat darker skin casually. Conservative density, strict sun avoidance and a pre-agreed pigment plan stay standard.
Our device manuals list contraindications worth screening for: recent dermabrasion, active skin disease or inflammation in the field, diabetes, smoking, a history of problem scarring, recent retinoic acid use, serious systemic disease, and anyone who won't commit to sun protection. The AAD adds two. Nobody gets treated over a tan or sunburn, and laser scar work belongs with a board-certified dermatologist.
This page is educational material for equipment buyers and clinic operators. It isn't medical advice and doesn't replace training, local regulation, or a practitioner's judgement.
Choosing the platform, and what sits around it
The workhorse here is the CF-01 ultrapulse CO2 fractional laser. It's RF-excited rather than glass-tube, which matters more than brochures admit: RF tubes hold output steady across a long service life, while glass tubes lose energy early and fire unevenly pulse to pulse. Over a year of scar courses, that becomes an awkward conversation about why session four looked weaker than session two.
A resurfacing course rarely travels alone. Discolouration left by old acne is a pigment problem, not a texture problem, and a QE-01 Q-switched Nd:YAG works differently: nanosecond pulses at 1064 nm and 532 nm shatter pigment instead of ablating tissue. Run pigment work before a scar course or well after it, never on inflamed healing skin. IPL belongs in a broader skin rejuvenation programme, not this one.
Want the underlying numbers before you commit to a demo? Ask for the CF-01 specification sheet and our scar-course protocol pack, or book a technical consultation on scar indications, and we'll walk your clinical lead through density, depth and recovery planning.
Frequently asked questions
How many sessions does acne scar treatment usually need?
Plan a course of several sessions, spaced far enough apart that the previous round has healed and started remodelling. How many depends on scar depth, scar type, skin type and tolerable downtime. Deep boxcar and rolling scars need more passes than shallow texture, and results keep improving for months afterwards.
Is fractional CO2 better than a non-ablative fractional laser?
Better at what, is the question. Ablative fractional CO2 removes tissue, so it delivers more change per session on atrophic scars. Non-ablative devices heat without vaporising, so recovery is shorter and pigment risk lower, but you'll need more sessions. Clinics with one machine and deep scar cases usually go ablative.
Can we treat a raised or surgical scar with the same protocol?
No. Hypertrophic and keloid scars behave differently from atrophic ones and can be aggravated by aggressive ablation, so they need a physician-led plan that may combine modalities. Fresh surgical scars carry their own timing questions. If a scar is raised, growing, or undiagnosed, refer before any laser fires.
Your next step
If scar resurfacing is going to be a real revenue line rather than an occasional add-on, get the detail before the demo. Request the CF-01 specification sheet and the scar-course protocol pack, tell us which scar and skin types fill your books, and we'll answer on scan area, handpiece and operator training.
Evidence & further reading
Educational material for equipment selection and operator training. It is not medical advice, a treatment protocol or a promise of clinical outcome.
- Manstein D, Herron GS, Sink RK, Tanner H, Anderson RR. Fractional photothermolysis: a new concept for cutaneous remodeling using microscopic patterns of thermal injury. Lasers Surg Med. 2004;34(5):426-38.
- Bin Dakhil A, Shadid A, Altalhab S. Post-inflammatory hyperpigmentation after carbon dioxide laser: review of prevention and risk factors. Dermatology Reports, 2023.
- Lee SS, Burgener MM, Sayyed AA, et al. Noninvasive Cosmetic Treatments for Fitzpatrick IV-VI: A Narrative Review of Safety and Efficacy Guidelines. Plastic and Reconstructive Surgery Global Open.
- American Academy of Dermatology - 10 things to know before having laser treatment for your scar