Knowledge What is a fractional CO2 laser? The Ultimate Guide to Skin Resurfacing and Scars
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Tech Team · Belislaser

Updated 2 days ago

What is a fractional CO2 laser? The Ultimate Guide to Skin Resurfacing and Scars


A fractional CO2 laser is an advanced dermatological tool that evolves traditional carbon dioxide laser technology by splitting a single laser beam into thousands of microscopic columns. Instead of ablating the entire skin surface, this technique targets specific zones while leaving intervals of healthy tissue intact, allowing for effective treatment of scars and aging with significantly faster healing times.

Traditional CO2 lasers were powerful but required months of recovery due to widespread tissue damage and redness. The fractional approach solves this by creating a "pixelated" grid of treated and untreated skin, delivering deep structural benefits while reducing recovery time to just a few days.

How Fractional Differs from Traditional CO2

The Legacy of Traditional Lasers

Carbon dioxide (CO2) lasers have been a staple in surgery and dermatology for over 25 years. While the traditional full-beam CO2 laser was highly effective for removing dermatological lesions and treating deep wrinkles, it came with a heavy cost. It required substantial downtime and caused redness that could persist for months.

The Fractional Innovation

The fractional CO2 laser utilizes a sweeping scanner to divide the primary beam into numerous microbeams. This creates a grid pattern on the skin where only specific microscopic zones are treated. Crucially, this method leaves 60% to 85% of the skin intact, which acts as a bridge to accelerate the healing of the treated areas.

The Mechanism of Action

Controlled Ablation

This is an ablative laser, meaning it physically removes damaged tissue. The device emits concise bursts of infrared light that target water molecules within the skin cells. This vaporizes the cells in microscopic columns, effectively removing old epidermal tissue to allow fresh skin to emerge.

Triggering Collagen Production

The impact goes beyond the surface. The laser’s thermal energy penetrates the deeper dermal layer, creating controlled micro-injuries. This signals the body's natural wound-healing response, triggering the production of new collagen and elastin fibers. This biological reaction is what ultimately firms and smooths the skin over time.

Primary Applications

Treating Signs of Aging

Because it targets both the surface and deeper layers, the fractional CO2 laser is indicated for intrinsic and extrinsic aging. It effectively addresses fine lines, wrinkles, and skin slackening (actinic elastosis).

Pigmentation and Texture

The laser helps correct surface irregularities. It treats solar lentigines (age spots), discoloration, and enlarged pores. It is also utilized for removing benign skin growths such as warts.

Scar Revision

One of the most valuable applications of this technology is treating atrophic scars, particularly those caused by acne. The stimulation of collagen helps to fill in and level out uneven skin texture caused by scarring.

Understanding the Trade-offs and Experience

The Sensation

While described as practically painless compared to older surgeries, the procedure is not sensation-free. Patients typically receive local anesthesia to numb the area. During the 30 to 120-minute session, the sensation is often compared to a rubber band snapping against the skin.

Recovery Realities

Although downtime is "minimal" compared to traditional CO2 lasers, it is not non-existent. The treated area requires a thick healing ointment and potentially dressings. However, healing is rapid, typically completing in about 6 days, allowing for a swift return to professional and social activities.

Making the Right Choice for Your Goal

When considering skin resurfacing, align your expectations with the capabilities of this technology:

  • If your primary focus is treating deep acne scars or wrinkles: The fractional CO2 laser provides the necessary ablative depth to trigger structural collagen changes that non-ablative lasers may not achieve.
  • If your primary focus is balancing results with recovery: This method offers a strategic compromise, delivering the potency of a CO2 laser without the months of persistent redness associated with traditional resurfacing.
  • If your primary focus is avoiding all downtime: Be aware that despite the "fractional" nature, there is still a roughly one-week recovery period where the skin must heal from the controlled micro-injuries.

By leaving healthy tissue bridges between treatment zones, the fractional CO2 laser maximizes efficacy while minimizing the disruption to your daily life.

Summary Table:

Feature Fractional CO2 Laser Traditional CO2 Laser
Mechanism Microscopic beam columns (pixelated) Full-beam ablation
Skin Impact 60%-85% tissue remains intact 100% surface ablation
Healing Time ~6 days Several weeks to months
Primary Goal Deep wrinkles, acne scars, texture Deep lesions, extreme resurfacing
Anesthesia Local anesthesia Local or general anesthesia

Elevate Your Clinic’s Results with BELIS Advanced Laser Technology

Are you looking to provide your clients with the gold standard in skin resurfacing? BELIS specializes in professional-grade medical aesthetic equipment designed exclusively for clinics and premium salons. Our advanced CO2 Fractional Laser systems deliver the perfect balance of deep structural rejuvenation and minimized downtime, ensuring superior outcomes for acne scars, wrinkles, and skin texture.

Beyond laser systems, our portfolio includes Diode Hair Removal, Nd:YAG, Pico, HIFU, and Microneedle RF, alongside body sculpting and specialized care devices like EMSlim and Hydrafacial systems.

Ready to upgrade your practice? Contact us today to discover how BELIS can help you deliver transformative results and grow your business.

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