Laser Skin Resurfacing: The Complete Guide to Ablative and Non-Ablative Lasers
Laser skin resurfacing rejuvenates the skin’s appearance through the controlled application of laser energy and is used to treat deep wrinkles, acne scars and pigmentation disorders.
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Important note
This article is for information purposes only and is not a substitute for a medical diagnosis or advice. If you are unsure, or if you require a personalised treatment plan, it is essential that you consult a qualified specialist.
Laser Skin Resurfacing (German: laser skin resurfacing) is one of the most intensive yet effective methods in aesthetic dermatology for completely renewing the skin’s appearance. Whether deep wrinkles, acne scars or pigmentation disorders – controlled laser treatment can achieve remarkable results. However, the term »laser« encompasses a wide range of completely different procedures, ranging from minimal downtime to healing periods lasting several weeks. Choosing the right laser is crucial for the outcome and your safety.
This guide helps you make sense of laser technology. We explain the basic classifications and show you which laser treatment is best suited to your skin condition and lifestyle.
Definition: What is laser skin resurfacing?
The mechanism of action of laser skin resurfacing
Laser Skin Resurfacing (German: laser skin resurfacing) is a dermatological procedure in which a laser beam is used to cause controlled damage to the skin. The laser’s energy either removes the upper layers of the skin or heats the tissue in a targeted manner.
The aim is to achieve deep-acting skin regeneration: the result is a smoother complexion, reduced wrinkle depth and stimulated production of collagen and elastin.
The basic classification: ablative vs. non-ablative
The effect and intensity of laser treatment are primarily determined by the type of laser:
Ablative lasers (ablative):
These lasers remove by means of Ablation They can remove all or part of the outermost layer of skin (epidermis) and may penetrate as far as the dermis, depending on the type of laser and its settings. They vaporise the tissue in a controlled and precise manner.
- Examples: CO₂ laser, erbium-YAG laser.
- Episode: Very good results, but also a long healing time (open wound, scab formation).
Non-ablative lasers: These lasers heat only the lower layer of the skin (the dermis) without damaging the surface.
Episode: A modest but gradual improvement in the appearance of the skin, with virtually no downtime.
The next stage: Full-surface vs. fractional
The second key difference determines the healing time:
Full-surface: The entire area of skin to be treated is ablated (typical of traditional, older CO₂ lasers).
- Episode: A radical transformation, but a very long and intensive recovery.
Fractional: The laser creates only tiny, column-shaped micro-injuries in the skin (»pixels«). Islands of healthy skin remain intact between the injured columns.
- Episode: Healing takes place much more quickly, as the healthy skin speeds up the regeneration process. This is now the most common method for intensive resurfacing treatments.
A direct comparison of the four laser procedures
| Procedure | Mechanism of action | Penetration depth | Downtime | Ideal for |
|---|---|---|---|---|
| Fractional ablation | Evaporation of the skin in micro-columns | Medium to deep | 5–10 days | Acne scars, deep wrinkles, intensive skin tightening |
| Full-surface ablative | Vapourisation of the entire skin surface | Shallow to medium-depth | 14 days to several weeks | Very deep wrinkles, severe sun damage |
| Non-ablative fractional | Heating of the skin in micro-columns only | Medium | 1–3 days | Fine lines, pigmentation problems, general skin firming |
| Non-ablative, full-surface | Heating of the dermis whilst the epidermis remains largely intact | Upper to middle layers of the dermis | None to a few hours | Slight redness, gentle stimulation of collagen production |
The main areas of application
Areas of use and clinical applications
- Acne scars & surgical scars: Ablative, fractional lasers (particularly CO₂) are among the most effective non-surgical methods for significantly reducing the appearance of scars and smoothing the skin’s surface.
- Deep wrinkles & sun damage: Ablative lasers radically rejuvenate the skin and can result in significant skin tightening.
- Pigment disorders: Non-ablative lasers and IPL systems are often the treatment of choice for superficial age spots.
- General skin texture: Non-ablative lasers improve the pore structure and promote collagen production.
The recovery period: downtime and what to expect
The outcome of the treatment depends directly on the choice of laser.
- Non-ablative: Often just slight redness and swelling, which subside within 24 hours.
- Fractional ablation: The skin shows marked redness. Tiny scabs (micro-wounds) form, which fall off after 5–7 days. The redness may persist for several weeks.
- Full-surface ablative: The skin is broken. A scab forms. The wound takes about 1–2 weeks to heal; however, noticeable redness may remain visible for weeks or even months, which can restrict social activities on an individual basis.
Risks associated with laser skin resurfacing and the need for sun protection
Ablative laser treatments are highly effective, but carry a significant risk that can only be managed by an experienced dermatologist or plastic surgeon.
Specific risks:
Pigment changes (hyper- or hypopigmentation), scarring, infections (particularly reactivation of herpes), persistent redness.
Key risk: pigmentation disorders
Once the outermost layer of skin has been removed, the skin is extremely vulnerable. Without consistent sun protection, the skin will produce new pigments as a defence mechanism, which can lead to new, often permanent and more extensive patches.
The golden rule: SPF 50+ for 6–12 months
Following ablative laser treatment, Daily, consistent sun protection with SPF 50+ This is an absolute requirement for at least 6 to 12 months following the procedure. Anyone who is unable or unwilling to comply with this rule should not opt for intensive laser treatment.
The risk of complications requiring costly corrective treatment is high with ablative procedures. A Consequential Costs Insurance can provide important financial security here.
Frequently Asked Questions (FAQ)
Ablative treatments would be considerably painful without anaesthesia and are therefore usually carried out using a strong anaesthetic cream, local injections or sedation. Non-ablative procedures are often experienced as a strong sensation of heat or burning; depending on the energy level, an anaesthetic cream may be advisable.
With ablative lasers, even a single intensive session can lead to a significant improvement in deep scars or wrinkles; however, depending on the initial findings, several sessions may be advisable. Non-ablative treatments are carried out as a course of treatment (3–6 sessions).
Ablative lasers are only suitable for very dark skin types with great caution and using specially adapted protocols, due to the increased risk of permanent pigmentation disorders (hyperpigmentation and hypopigmentation).
No, complete removal is usually not possible. However, ablative, fractional lasers can significantly reduce the appearance of the condition and visibly smooth the surface. Studies report high improvement rates in some cases, depending on the initial findings; however, these vary considerably from person to person.
The cost varies considerably depending on the type of laser, the area being treated and the intensity. A CO₂ laser treatment for the whole face often starts at €2,500 and can cost considerably more.
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