Analysis of immediate use of sunscreen after microneedling.

INTRODUCTION: Microneedling promotes skin microlesions that lead to an inflammatory process, increasing cell proliferation, cell metabolism, and synthesis of collagen and elastin, therefore restoring skin integrity. OBJECTIVE: This study aims to investigate the differences between the physical and the physical-chemical sunscreen application after microneedling, assessed through histological analysis. METHOD: This was a two-phase study. The first phase investigated the physical and physical-chemical sunscreen penetration mixed with India ink through histological analysis. The sunscreens were applied after the microleakage in vivo on the skin of a volunteer who underwent abdominoplasty 24 hours after the procedure. Histological analyses were carried out using optical and electron microscopy. The second phase analysed the skin reactions with the use of physical sunscreen after different microneedling treatments. The sample consisted of 30 volunteers distributed into three groups: G1 received the "Roller" microneedling, G2 received pen micropuncture treatment, and G3 received the fractional radiofrequency treatment. RESULTS: The histological analyses of the first phase indicated that the physical-chemical protection sunscreen penetrated more deeply, and pigment was found among the collagen fibres and the dermal fibroblast cytoplasm in comparison to the physical protection sunscreen, which had the pigment confined exclusively in the superficial epidermis layer. The second phase results demonstrated that the use of the physical protection sunscreen after the different microneedling techniques showed no adverse reactions such as itching, pain or soreness, and the hyperaemia. CONCLUSION: The proposed intervention showed that the use of physical protection sunscreen after different microneedling procedures is safe.

Use of Stationary Ultrasound Device In Subcutaneous Abdominal Fat Tissue: Analysis of Clinical Effects.

Background: High-intensity stationary therapeutic ultrasound (HITU) technology is gaining popularity as an attractive modality for treating different conditions, but little is known about its application in aesthetics. Objective: To analyze the effects of stationary unfocused ultrasound (HITU technology) in treating localized fat in women's abdominal region. Methods: The sample consisted of 43 women with localized abdominal adiposity, assessed pre and post-treatment by assessment protocols, adversity analysis questionnaires, ultrasound exams, and serum level exams. The volunteers were randomly divided into three subgroups: G-1, who used the device off, G-2 received therapy with the device once a week for two months (Parameters: Pulsed - 100Hz - 50% - 4.0 W/cm2 - 20 minutes) and the G-3 who used the device on twice a week for a month (Parameters: Pulsed - 100Hz - 50% - 3.2W/cm2 - 30 minutes). All groups received eight sessions in total. Results: There was a significant reduction for G-3 in the plicometry of the lower right region (p=0.01) in the comparison between the final and initial moments. In the comparison among the three research groups, there was a significant reduction in plicometry in the lower right (p=0.03) and left (p=0.02) regions in G3. Via ultrasound, a reduction in the fat layers average was observed in all groups. In G-3, there were significant differences in the left infraumbilical region (p=0.02) and right (p=0.04). In the group comparison, the right infraumbilical region showed significant differences (p=0.04) for the G-3. No differences were found for weight, BMI, body fat percentage and supra, infra and umbilical perimetry (p>0.05). The adverse reactions reported were: Mild hyperaemia (75%) and sensation of shock (21%), there were also reports of improvement in fluid retention in 93.7 percent of the volunteers, and most were satisfied with the result. Conclusion: Both treatment protocols for the reduction of localized adiposity were effective compared to the placebo group, with a significant reduction in the use of ultrasound and plicometry in the concentration of fat in the lower abdominal region.