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Which laser erases acne scars better? a Head-to-Head test

NCT ID NCT03850925

Symptom relief Sponsor: Dongtan Sacred Heart Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 26, 2026 · Last updated Aug 27, 2026 · Updated 1 time

Summary

This study compares two laser treatments for facial acne scars: a picosecond Nd:YAG laser with a special lens and a nonablative fractional laser. Participants receive four sessions of one laser type, and researchers measure changes in scar severity using a standard grading scale. The goal is to see which laser is more effective at improving the appearance of acne scars.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Laser therapy (picosecond Nd:YAG laser with diffractive lens array vs. nonablative fractional laser)
What this could lead to
If successful, this could identify a more effective laser treatment for reducing the appearance of acne scars.
What could go wrong
The trial is small (25 participants) and early-stage, so results may not apply broadly. Laser treatments can cause temporary redness, swelling, or pigmentation changes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

25 people

The number who actually took part.

Started

May 2019

Finished

Apr 2020

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

19 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Subjects with facial atrophic acne scars * Subjects who observe the schedules and protocols of the clinical trial * Subjects who give informed consent to participate in the clinical trial Exclusion Criteria: * Subjects who have active acne under treatment * Subjects who had received any other treatments for acne scarring for 6 months prior to the first treatment * Subjects who underwent other treatments including chemical, mechanical or laser resurfacing during the study period * Subjects who have current acute illness * Subjects who are considered inappropriate for the clinical trial under the judgement of investigators

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Acne scars

Contacts and locations

Locations

  • Dongtan Sacred Heart Hospital, Hallym Universtiy College of Medicine

    Hwaseong-si, Gyeonggi-do, 18450, South Korea

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