The Expanding Role of CO 2 Lasers in Plastic and Cosmetic Surgery: An Eight-year Single-centre Experience and Narrative Review

Abstract

Background:

Carbon dioxide (CO₂) lasers have transitioned from niche resurfacing tools to versatile mainstays in aesthetic and reconstructive surgery.

Objectives:

To present 8 years of single-centre clinical outcomes using fractional and surgical CO₂ platforms, together with a narrative review of emerging biologic adjuncts.

Methods:

Retrospective analysis of 1,098 patients (650 females, 448 males; aged 4-81 years) treated between August 2017 and May 2025. Indications included acne scars, pigmentary dyschromia, benign cutaneous lesions and post-traumatic/burn scars. Outcomes were measured using clearance rates and patient satisfaction. A narrative review synthesised recent evidence on adjunctive stromal vascular fraction (SVF), platelet-rich plasma (PRP) and exosomes.

Results:

Fractional CO₂ achieved 76%-85% mean improvement across texture and pigment indications, with ≥84% patient satisfaction. Surgical mode achieved 95% clearance of benign lesions and ≥50% keloid regression in 86% of cases. Adverse events were limited to transient erythema (47%), post-inflammatory hyperpigmentation (9%) and one delayed hypopigmentation. Literature review suggests biologic adjuncts enhance collagen remodelling, reduce downtime and improve pigmentary safety.

Conclusions:

CO₂ lasers remain the gold standard for resurfacing and lesion removal. Biologic adjuncts, particularly SVF, PRP and exosomes, represent promising synergistic strategies. Prospective controlled trials are warranted to define optimal combined protocols.

Introduction

Since the advent of pulsed resurfacing in the 1990s, ¹ iterative refinements in scanner optics, pulse modulation and fractional delivery have transformed the CO₂ laser into a cornerstone of aesthetic and reconstructive practice.^2,3Our centre integrated a dual-mode fractional and surgical CO₂ platform in 2017, which has since become integral to treatment protocols for acne scarring, pigmentary disorders and benign cutaneous excisions. Various uses of CO₂ lasers include facial rejuvenation, post-acne scars, pigmentation issues, anti-ageing (fine lines), surgical removal of warts, naevi, skin tags and cancer, surgical scars, burn scars, removal of corn foot and vaginal rejuvenation. This study reports our 8-year experience and contextualises outcomes within the contemporary evidence base.

Figure 1.

Fractional CO₂ Laser Mechanism of Action (Schematic).

Operating at 10,600 nm, the CO₂ laser matches the absorption peak of intracellular water, producing precise vaporisation within ~20 µm and a surrounding 100–200 µm coagulative rim that confers haemostasis. ⁴ Fractional delivery pixelates the beam, sparing 70%–90% of the epidermis and thereby accelerating re-epithelialisation.^5,6 Histologic studies confirm neocollagenesis and elastic fibre reorganisation peaking at 3-6 months (Figure 3).^7,8

Figure 2.

Our Machine with Fractional and Surgical Probes Mounted Respectively.

Figure 3.

Before and After Clinical Example of Acne Scarring Treated with Fractional CO₂.

Patients and Methods

Design: Retrospective cohort plus narrative review.

Setting: Single cosmetic surgery centre (Luxor Hospital), Vadodara, Gujarat, India.

Period: August 2017-May 2025.

Participants: 1,098 patients (650 females, 448 males), aged 4-81 years (median 32).

Interventions: Fractional CO₂ (scanner density 5%-20%, pulse energy 10-40 mJ) for scars/pigment; surgical CO₂ (continuous wave, 4-8 W) for excisions (Figure 2).

How we select the patients and how we do the laser: A patient consults us for their various problems like acne scars, pigmentation, uneven skin tone, keloids or various skin lesions such as moles, warts and other macular localised lesions. We classify them as to whether they will need a fractional CO₂ laser or surgical CO₂ laser and explain the whole process to them. Next, we apply Prilox cream to the concerned areas for topical anaesthesia and wait for around 25–30 min. For various localised skin lesions, we inject local anaesthesia too, just before proceeding with surgical CO₂ so that the procedure is completely painless. Now the laser procedure is done, which takes around 15 to 20 min for fractional CO₂ (if for the whole face) or around 5 min for surgical CO₂ (if for a few skin lesions). Then the patient washes their face, ice application is done, and a healing cream (like Hydroheal Nova) is applied all over. Post-procedure instructions are given, like not to expose the lasered area to any form of heat for 4–5 days, use a sunscreen and moisturiser regularly and to review with us after 1 week. For cases of uneven skin tone, we generally need two to three sittings of fractional CO₂ laser, which is around three to four sittings for pigmentary lesions, around five to seven sittings for acne scars, and around six to eight sittings for burn/trauma scars to improve. Surgical CO₂ laser gives results in a maximum of one to two sittings for various localised skin lesions to be treated. We do regular followups and make sure that our patients do not get hyper/hypopigmented and put them on various topical agents accordingly.

Outcomes: Lesion clearance, patient satisfaction (Likert scale).

Results

Fractional Mode

Indication	n	Mean Sessions ± SD	Satisfaction ≥4/5
Acne scars 9	97	5 ± 2	88%
Uneven tone/detanning	312	2 ± 1	84%
Pigmentary lesions	174	3 ± 1	86%
Burn/trauma/surgery scars	198	6 ± 2	92%

Surgical Mode

Benign lesions: 95% one-session clearance; <2% hypertrophic scars (Figures 3–6).

Figure 4.

Uneven Skin Tone Treated with Fractional CO₂.

Figure 5.

Post-surgical (Outside Operated) Scar Correction by Fractional CO₂.

Figure 6.

Skin Tags/Mole Removal Using Surgical CO₂.

Viral warts: 89% cure at 3 months (Figure 7).

Figure 7.

Viral Wart and Skin Lesion Surgical CO₂ Correction.

Figure 8.

Comparison of Traditional versus Fractional Resurfacing Depth.

Keloids: Debulking + intralesional triamcinolone achieved ≥50% regression in 86%.

Adverse effects: Mild erythema (47%, which gets healed by healing creams), post-inflammatory hyperpigmentation (PIH) (5%-6%, mostly Fitzpatrick IV-V), one delayed hypopigmentation.

Discussion

CO₂ as the Gold Standard

Water absorption properties make CO₂ ideal for both superficial resurfacing and scalpel-like excision. ¹⁰ Our outcomes align with prior series reporting >80% acne scar improvement.^4,6 The various advantages and caveats are as follows: CO₂ provides precision and haemostasis, facilitating periocular and cosmetically sensitive procedures.^11-16 Fractional delivery reduces downtime; however, PIH remains a concern in darker phototypes. Pre-treatment with hydroquinone or tranexamic acid mitigates this risk. The various technological trends are:

AI-driven scanners with real-time density titration. ¹⁷

Hybrid CO₂ + 1570 nm systems enabling deeper dermal thermolysis.

Adjunctive biologic therapies (written below).

The various adjunctive therapies are as follows:

Recent studies suggest synergy between CO₂ lasers and biologics.

1. Stromal vascular fraction (SVF): Meta-analysis shows CO₂ + SVF outperforms CO₂ alone in hypertrophic scar outcomes.^8,18,19

2. Exosomes: Split-face RCT showed greater acne scar reduction with less erythema and shorter downtime.^8,18,19

3. Platelet-rich plasma (PRP): Enhances acne scar improvement when combined with CO₂ versus laser alone. ²⁰

Limitations and Future Work

Retrospective design and single-centre scope limit generalisability.

Future priorities:

Prospective RCTs in Asian skin comparing CO₂, Er:YAG and picosecond platforms.

Controlled trials of CO₂ combined with SVF, PRP, exosomes and stem cells.

Standardisation of adjunct protocols and long-term durability studies.

Conclusion

CO₂ lasers remain a cornerstone of aesthetic and minor surgical practice/dermatology. Our 8-year data confirm their versatility, safety and predictability across diverse indications. Adjunctive biologic therapies—SVF, PRP, exosomes and stem cells—represent a promising frontier. AI-guided systems and combination regimens are poised to extend the clinical primacy of CO₂ in cutaneous laser surgery.