CO₂ Laser Science
How 10,600 nm CO₂ energy resurfaces skin and cuts soft tissue, the difference between fractional and ablative treatment, and how one platform family serves aesthetic, dental and veterinary practice.
How does a CO₂ laser work?
A CO₂ laser uses a 10,600 nm wavelength that is strongly absorbed by water in tissue. In aesthetics it resurfaces skin and revises scars, in fractional or full-field ablative modes; in dental and veterinary practice it cuts, ablates and contours water-rich soft tissue with coagulative, hemostatic support. Depth and density decide how strong the correction is and how much downtime follows.
FAQs
What is a CO₂ laser used for?
CO₂ lasers use a 10,600 nm wavelength that is strongly absorbed by water in tissue. In aesthetics they resurface skin and revise scars; in dental and veterinary practice they cut, ablate and contour water-rich soft tissue with coagulative, hemostatic support.
What is the difference between fractional and ablative CO₂?
Ablative (full-field) treatment removes a continuous layer of tissue for deeper resurfacing or surgical cutting; fractional treatment affects only a grid of micro-zones, sparing surrounding tissue for lower downtime. Many platforms offer both, with adjustable depth and density.
Which skin types suit CO₂ resurfacing?
Ablative CO₂ is generally best suited to lighter Fitzpatrick types because of melanin sensitivity. Experienced clinicians can treat a wider range with conservative parameters, appropriate protocols and careful post-care — but patient selection matters.
How much downtime does CO₂ resurfacing involve?
Downtime depends on depth and density. Lighter fractional treatments may involve a few days of redness; deeper resurfacing may involve roughly a week of recovery. Adjustable settings let providers tailor recovery to the patient's goals.
What does a dental CO₂ laser do?
It supports precise cutting, ablation, contouring and hemostatic workflow on water-rich oral soft tissue — for selected procedures such as gingivectomy, frenectomy and implant uncovering. Use depends on provider training, scope, diagnosis and clinical judgment.
What does a veterinary CO₂ laser do?
It supports selected soft-tissue and oral surgery — excision, ablation and contouring of masses, growths and gingival hyperplasia — with hemostatic support. Use is veterinarian-directed, and it is not a bloodless or painless guarantee: anaesthesia, pain management and laser-safety protocols still apply.
Technology explainers (5)
- 10,600 nm CO₂ Laser — The far-infrared wavelength produced by carbon dioxide laser sources, strongly absorbed by water and therefore by tissue generally.
- Fractional CO₂ Laser — A CO₂ laser delivery method that treats a fraction of the surface in a pattern of microscopic zones, leaving untreated tissue in between.
- Ablative CO₂ Laser — A CO₂ delivery mode in which energy is absorbed at the surface strongly enough to remove tissue rather than heat it alone.
- Fractional Scanning — The delivery hardware that places a fractional pattern across a treatment area, distributing zones in a controlled array.
- Controlled Thermal Remodeling — Delivery of controlled heat to the dermis to support tissue remodeling while limiting effects on surrounding structures.
Clinical education (11)
- CO₂ Laser FAQs — CO₂ laser FAQs across aesthetic resurfacing, dental soft-tissue, and veterinary surgery — fractional vs ablative, beam delivery, and platform selection.
- CO₂ Resurfacing Intensity Ladder — How CO₂ resurfacing spans an intensity ladder from light fractional to deep ablative — matching depth, density, and downtime to the patient and goal.
- Fractional CO₂ vs PicoMatrix™ — How ablative fractional CO₂ compares with non-ablative PicoMatrix™ remodeling — depth of correction vs downtime, and which suits which patient and goal.
- Fractional CO₂ vs RF Microneedling — How fractional CO₂ and RF microneedling differ — ablative resurfacing vs radiofrequency heat through needles, and which suits which goals and downtime.
- Articulated Arm vs Fiber CO₂ Laser — How CO₂ beam delivery differs — articulated arm vs fiber/hollow-waveguide — and why delivery architecture affects cutting, consumables, and cost of ownership.
- CO₂ Laser for Frenectomy — Stop referring frenectomies out: how a 10,600 nm CO₂ laser releases labial, buccal and lingual frena with controlled ablation and hemostatic support.
- CO₂ Laser for Implant Uncovering — How a 10,600 nm CO₂ laser supports second-stage implant uncovering and peri-implant soft-tissue access — with the parameter and scope boundaries.
- CO₂ Laser for Gingivectomy — Keep gingivectomy and gum contouring in-house: how a 10,600 nm CO₂ laser cuts and coagulates in one pass for a clear field and controlled margins.
- CO₂ Laser vs Diode Dental Laser — How CO₂ (10,600 nm) and diode dental lasers differ for oral soft tissue — tissue interaction, hemostasis, contact vs non-contact delivery, and when each fits.
- CO₂ vs Er:YAG Dental Laser — How CO₂ (10,600 nm) and Er:YAG (~2,940 nm) lasers differ for dental soft tissue — absorption, coagulation, and when each is the better fit.
- CO₂ Laser for Veterinary Surgery — Expand your surgery menu: how a 10,600 nm CO₂ laser cuts and coagulates in one step, and how a guided protocol system gets the whole team using it.
Training & protocols (4)
- Alexa CO₂: New-Owner Operating Guide — A new-owner orientation to operating your Alexa CO₂ platform — room setup, plume and fire safety, delivery, workflow, and where verified settings live.
- Alexa Femme™ CO₂ Women's Health Education — What Alexa Femme™ is — an Alexa CO₂ intimate-wellness fractional protocol using a 360° handpiece, with conservative, provider-directed boundaries.
- Alexa Follicle™ Scalp and Follicle-Support Education — Alexa Follicle™ turns the Alexa CO₂ into a scalp service: a non-ablative fractional follicle-support protocol clinics build as a planned series.
- SleepTite™ Snoring-Support Education — What SleepTite™ is — a specialty CO₂ snoring-support protocol on compatible Alexa CO₂ configurations, not a treatment for obstructive sleep apnea.
Treatments (3)
- Skin Rejuvenation — Tone, texture, pores, photodamage, and skin-quality protocols using Pro 1 Pico, PicoMatrix™ advanced remodeling, DPL Elite, and Alexa fractional CO₂.
- Hair Restoration — Hair-restoration support using the PicoMatrix™ advanced remodeling handpiece on Pro 1 Pico and Alexa Follicle™ fractional CO₂ pathways.
- Toenail Fungus — A specialty podiatry treatment category using Pro 1 Pico long-pulse 1064 nm thermal protocols and Alexa CO₂ channeling pathways for onychomycosis care.
From the blog (6)
- Ablative or fractional? The CO₂ distinction — These two words describe different things, and a treatment can be both. Getting the vocabulary right changes how you read a CO₂ specification sheet.
- Why fractional CO₂ results keep improving for months: collagen remodelling for clinic owners — How fractional CO₂ triggers months of collagen remodelling, why it heals faster than full-field resurfacing, and how to build a texture service around it.
- The scanner is the laser: how to compare fractional CO₂ platforms — Power, density, pattern and depth: how to read a fractional CO₂ spec sheet, and which scanner questions separate platforms.
- Acne scars are a service line, not a single treatment: building it with fractional CO₂ — How fractional CO₂ treats rolling, boxcar and icepick scars, what a reliable protocol looks like, and how to build acne-scar revision into a service line.
- Build a CO₂ pre- and post-care protocol that keeps patients on course — How to design a fractional and ablative CO₂ care protocol: screening questions, pre-treatment prep, aftercare phases, pigment risk, staff roles and a checklist.
- The CO₂ recovery timeline your patients should hear before they book — A week-by-week CO₂ resurfacing recovery timeline for fractional and ablative work, plus how to set expectations, write the handout and know when to escalate.
Platforms in this category
- Alexa CO₂ Aesthetic — Bring one of aesthetics’ most sought-after corrective technologies into your practice. Alexa CO₂ Aesthetic helps address wrinkles, sun damage, scars, uneven texture and skin laxity, while Alexa Femme™ and Alexa Follicle™ expand your offering into women’s wellness and hair-restoration treatments. One premium platform. Multiple high-value service lines. More opportunities to grow your practice.
- Alexa CO₂ Dental — Alexa CO₂ Dental turns soft-tissue dentistry into a service line. One 10,600 nm CO₂ platform supports gingival contouring and smile-design tissue work, frenectomy, implant uncovering, restorative troughing, operculectomy, and oral surgery — with articulated arm beam delivery and hemostatic support that keeps the field clear and the workflow predictable.
- Alexa CO₂ Veterinary — Alexa CO₂ Veterinary gives practices a professional 10,600 nm soft-tissue surgical laser — built to expand the procedure menu and earn its place in the surgery suite. Soft-tissue and oral surgery, gingival hyperplasia, mass and growth removal, and selected eyelid procedures, with hemostatic support and an intelligent guided-protocol system that helps the whole team adopt CO₂ surgery with confidence.
Relevant studies
Published research behind this topic, held in our evidence library with the date each source was last verified.
- Alexiades-Armenakas MR, Dover JS, Arndt KA. The spectrum of laser skin resurfacing: nonablative, fractional, and ablative laser resurfacing. J Am Acad Dermatol. 2008;58(5):719-37. (PMID 18423256)
- Hantash BM, Bedi VP, Kapadia B, et al. In vivo histological evaluation of a novel ablative fractional resurfacing device. Lasers Surg Med. 2007;39(2):96-107. (PMID 17311274)
- Metelitsa AI, Alster TS. Fractionated laser skin resurfacing treatment complications: a review. Dermatol Surg. 2010;36(3):299-306. (PMID 20100273)
- Asnaashari M, Behnam Roudsari M, Shirmardi MS. Evaluation of the Effectiveness of the Carbon Dioxide (CO2) Laser in Minor Oral Surgery: A Systematic Review. J Lasers Med Sci. 2023;14:e44. (PMID 38028885)
- Protásio ACR, Galvão EL, Falci SGM. Laser Techniques or Scalpel Incision for Labial Frenectomy: A Meta-analysis. J Maxillofac Oral Surg. 2019;18(4):490-499. (PMID 31624426)
- Holt TL, Mann FA. Soft tissue application of lasers. Vet Clin North Am Small Anim Pract. 2002;32(3):569-99. (PMID 12064042)
- Pieper JB, White AG. Applications for Laser in Veterinary Dermatology. Vet Clin North Am Small Anim Pract. 2025;55(2):251-284. (PMID 39755502)
- Silverman EB, Read RW, Boyle CR, Cooper R, Miller WW, McLaughlin RM. Histologic comparison of canine skin biopsies collected using monopolar electrosurgery, CO2 laser, radiowave radiosurgery, skin biopsy punch, and scalpel. Vet Surg. 2007;36(1):50-6. (PMID 17214820)