The 160-participant trial published in 2026 supports CaHA filler plus CO2 laser for rolling acne scars, the depressed wavy scars tethered by bands. The authors concluded the combined regimen was effective and safe, with optimal results for boxcar and rolling subtypes. The study enrolled 160 subjects at Dexi medical aesthetic clinic from December 2023 to March 2025. Researchers allocated subjects evenly to observation or control groups by random-number generation, according to Springer Nature's Aesthetic Plastic Surgery the trial report.
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Table of Contents
- What did the trial test?
- Why does this pairing suit rolling scars?
- How does this fit other 2026 combination results?
- What should you discuss before treatment?
What did the trial test?
The trial tested calcium hydroxylapatite (CaHA) filler injection combined with CO2 ablative fractional laser (AFL). AFL removes tiny columns of scarred skin to trigger fresh collagen.
CaHA filler adds immediate support while stimulating longer-term firming. The design used two evenly allocated groups created by random-number generation. That structure helps compare outcomes between treatment strategies rather than relying on before-and-after impressions.
Why does this pairing suit rolling scars?
Rolling scars often stay tethered by fibrous bands beneath the skin. Release or volumization plus resurfacing is commonly used rather than topical care alone, as Dr. Anna Medical Aesthetics explains on its acne scar revision page.
Creams cannot cut tethers or lift broad depressions. The packet reports a two-way benefit: the combination enhanced scar remodeling synergistically, while CaHA injection aided post-laser recovery by mitigating adverse events after AFL. In practical terms, laser smooths surface texture while filler supports the dip from below.
How does this fit other 2026 combination results?
A separate 2026 randomized trial paired fractional CO2 laser with polynucleotide plus exosome-mimetic nanovesicles. Laser alone improved ECCA scores by 35.9%, while the augmented approach improved scores by 47.3%, according to Termedia's Advances in Dermatology and Allergology the comparative trial summary.
The gap was larger for rolling scars: 72% improvement with the added agents versus 48% with laser alone. The pattern matches the CaHA trial logic. Laser resurfacing alone helps, but adding a biostimulatory partner can lift results for wavy, tethered scars.
What should you discuss before treatment?
Ask for formal scar-type grading first. Rolling, boxcar, and ice-pick scars respond differently, and ice-pick scars show poorer response to resurfacing-focused plans. Grading guides whether release, filler, laser, or a staged mix fits your pattern.
Key limits deserve direct questions. The 160-patient study was prospective but single-center. Background evidence notes AFL alone often needs multiple sessions and raises post-inflammatory erythema and hyperpigmentation risk, especially in darker skin. Bring recent breakout history and pigment-change history, then ask how the clinic will adjust energy, intervals, and aftercare for your skin tone.
- Ask for your scar-type map and photos
- Compare combination therapy versus laser alone for your scars
- Review downtime, sun care, and pigment-risk steps
- Ask how ice-pick scars, if present, will be handled separately
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