Evaluation of the cumulative effect of Radiofrequency Microneedling and fractional Erbium: Glass 1565 laser in moderate to severe acne scars in skin of color

Treatment of erythematous acne scars using 595-nm pulsed dye laser combined with 1565-nm ResurFX nonablative fractional laser

BACKGROUND

Acne vulgaris is a common inflammatory disease associated with various sequelae after skin lesion remission. Acne erythema has been considered simple erythema or a vascular lesion; however, because the understanding of this disease has improved, acne erythema is currently considered an early scar with erythematous components.

AIMS

This study evaluated the efficacy of using both a 595-nm pulsed dye laser (PDL) and 1565-nm nonablative fractional laser (NAFL) for the treatment of erythematous scars caused by acne.

METHODS

Ninety patients with acne scars were equally randomized to two groups. Group A (n = 45) received treatment with the NAFL. Group B (n = 45) received treatment with the PDL and NAFL. Each patient underwent one treatment session and 4 weeks of follow-up.

RESULTS

Qualitative (χ2 = 12.415; p < 0.05) and quantitative (t = 2.675; p < 0.05) scores of Groups A and B were determined using a global scarring grading system and exhibited statistically significant differences. The quantitative score of Group A was higher than that of Group B (6.67 ± 3.46 vs. 4.98 ± 2.44). The erythema areas of the groups differed significantly after treatment, with Group B exhibiting more notable score improvements (5.00 [3.10, 7.10] vs. 2.80 [1.65, 4.60]; Z = 3.072; p < 0.05). The erythema regression rate of Group B (88.9%) was significantly higher than that of Group A (66.7%) (χ2 = 20.295; p < 0.001). Adverse events, including redness and swelling (86.6%), scabbing (78.8%), and purpura (36.6%), occurred within 7 days for 86.6% of patients.

CONCLUSIONS

The combined use of the PDL and NAFL is safe and effective for erythematous acne scars.

Review of Fractional Nonablative Lasers for the Treatment of Dermatologic Conditions in Darker Skin Phototypes

BACKGROUND

Fractional nonablative lasers (NAFLs) have demonstrated efficacy and safety for treating dermatologic conditions in patients with darker skin phototypes. Nonablative lasers are preferred in darker skin tones due to lower risk of postinflammatory hyperpigmentation.

OBJECTIVE

This review aims to identify the ideal laser options and parameters for treating common dermatologic conditions in patients with skin types IV-VI.

MATERIALS AND METHODS

A comprehensive literature search was conducted on PubMed in May 2023. Of 1,065 articles were identified, and 40 articles met the inclusion criteria. The studies were classified based on design, dermatologic condition, and skin phototype of patients, and assigned levels of evidence according to the Modified Criteria of the Oxford Center of Evidence Based Medicine.

RESULTS

Strong level 1 evidence supports the treatment of melasma and atrophic scars using NAFL. Moderate level 2 evidence was found for using NAFL in acne vulgaris, striae, and skin rejuvenation; 45% of the studies examined skin types III-IV, 20% III-V, 7.5% II-IV, 5% II-V, 5% IV alone, and 2.5% I-IV.

CONCLUSION

Further research is needed to determine the optimal treatment modalities and parameters for skin types V and VI. Appropriate device selection and conservative treatment settings are crucial for optimizing outcomes and minimizing adverse events.

Radiofrequency and Radiofrequency Microneedling in Skin of Color: A Review of Usage, Safety, and Efficacy

BACKGROUND

Radiofrequency (RF) and radiofrequency microneedling (RFM) for rhytides, scarring, and skin rejuvenation are believed to have a lower risk of postprocedural dyspigmentation in darker skin types.

OBJECTIVE

To explore the safety and efficacy of RF and RFM in Fitzpatrick skin Types III to VI.

METHODS AND MATERIALS

A systematic review of PubMed/MEDLINE databases from 2000 to 2021 using combinations of the terms radiofrequency, microneedling, skin of color, and Fitzpatrick was performed. Exclusion criteria included non-Fitzpatrick skin Types III-VI patient population, nonprimary articles, nonskin radiofrequency, and nonhuman studies.

RESULTS

Thirty-five articles addressing the use of RF or RFM in skin of color were identified-22 for skin rejuvenation, 7 for acne scars, 4 for nonacne scars, 1 for hyperpigmentation, and 1 for acne treatment. Seven studies noted transient postinflammatory hyperpigmentation, 1 observed mild prolonged hyperpigmentation, and only 1 study reported permanent scarring.

CONCLUSION

Radiofrequency and RFM seem to have a low risk of scarring or hyperpigmentation in skin of color. This review demonstrates that these procedures have been successfully used primarily for rhytides, acne scarring, and skin rejuvenation. However, a large proportion of the studies lack strong quality evidence.