POTENZA is an insulated-needle RF microneedling platform developed by Cynosure. Fractional RF microneedling (FMR) has been shown to be effective against acne scars, wrinkles, excess sebum, and age-related skin changes in multiple peer-reviewed clinical trials. This article explains the mechanism of action and efficacy of POTENZA based on evidence from key published studies.
What Is POTENZA?
POTENZA® is an RF microneedling device by Cynosure that uses insulated needles. Its design delivers RF energy exclusively from the needle tips, minimizing thermal damage to the epidermis while precisely targeting energy deep in the dermis. A key feature is the ability to switch between monopolar and bipolar modes depending on the condition being treated.
Unlike conventional microneedling (mechanical puncture only), POTENZA simultaneously delivers both RF thermal stimulation and mechanical injury, inducing a more powerful wound-healing cascade and neocollagenesis. In a histological study using a porcine skin model by Wang et al. (Lasers in Surgery and Medicine 2024), bipolar mode was confirmed to significantly upregulate TGF-β, Ki67 (a cell proliferation marker), MMP3, and elastin expression.
Mechanism of Action: A Two-Stage Stimulus
Mechanical Injury from Microneedles
Ultra-fine insulated needles create countless micro-punctures in the dermis. These controlled micro-injuries trigger the wound-healing cascade, initiating a biological repair process of platelet activation → growth factor release → fibroblast activation → collagen and elastin production.
Dermal Heating via RF Energy
Because the insulated needles release RF energy only from their tips, the collagen fiber network in the dermis is heated while thermal damage to the epidermis is minimized. This thermal denaturation produces an immediate tightening effect and promotes long-term collagen and elastin remodeling. A histological analysis by Hwang et al. (Scientific Reports 2025) confirmed that MNRF significantly increased collagen and elastin and reduced senescent fibroblasts compared with microneedling alone, providing histological proof of the added benefit of RF.
Clinical Evidence
The following is an overview of five key studies — all prospective trials, meta-analyses, or histological studies published in peer-reviewed English-language journals.
| 著者・掲載誌（年） | 研究デザイン | 対象・症例数 | 主な結果 |
|---|---|---|---|
| Min et al. Arch Dermatol Res 2015 | 前向き無作為化比較試験（split-face） | 20例（ニキビ＋ニキビ跡 / Fitzpatrick III〜IV） | 炎症性ニキビ80%・非炎症性65%減少。icepick・boxcar瘢痕でFMRがBRより優位。皮脂分泌有意減少。NF-κB・IL-8抑制を組織学的に確認。 |
| Cucu et al. J Cosmet Dermatol 2021 | 系統的文献レビュー（39論文） | 陥凹性ニキビ跡患者 | フラクショナルRFは単独でも他治療との組み合わせでも有効。真皮コラーゲン増加・瘢痕テクスチャー改善の一貫したエビデンスを確認。 |
| Kauvar et al. Lasers Surg Med 2022 | 前向き非盲検試験 | 9例（平均47.6歳 / Fitzpatrick II〜IV） | 6回施術後、wrinkleスコア4.33→3.33（p<0.005）。88.9%がGAIS改善。全例がテクスチャー・しわ改善を自覚。有害事象・ダウンタイムなし。組織学的にコラーゲン再形成を確認。 |
| Hwang et al. Sci Reports 2025 | 前向き無作為化split-face試験 | 29例（平均65.8歳の高齢女性） | 4回MNRFで弾力・保水・しわが有意改善。組織学的にコラーゲン・エラスチン増加＋老化線維芽細胞の減少を確認。MN単独より統計的に優位。 |
| Wang et al. Lasers Surg Med 2024 | 豚皮モデル組織学的検討 | 動物実験（豚背部皮膚） | バイポーラモードでTGF-β・Ki67・MMP3・エラスチンの発現がモノポーラより高値。自動インピーダンスフィードバックシステムの有効性を確認。 |
Indications and Estimated Number of Sessions
The table below summarizes the effects and estimated session counts for each indication based on the published literature. Actual numbers may vary depending on individual differences, scar depth, and needle settings.
| お悩み | 期待効果 | 目安回数 | 根拠論文 |
|---|---|---|---|
| ニキビ跡 （陥凹性・icepick・boxcar） | 瘢痕テクスチャー改善、真皮コラーゲン新生による底上げ | 3〜6回 | Min 2015、Cucu 2021 |
| 活動性ニキビ （炎症性・非炎症性） | 炎症性80%・非炎症性65%減少、皮脂分泌抑制 | 2〜3回（4週間隔） | Min et al. Arch Dermatol Res 2015 |
| しわ・肌のたるみ | wrinkleスコア有意改善（4.33→3.33）、88.9%がGAIS改善 | 6回 | Kauvar et al. Lasers Surg Med 2022 |
| 加齢による肌質低下 （弾力・保水・テクスチャー） | 弾力・保水・しわの多面的改善、老化線維芽細胞の減少 | 4回〜 | Hwang et al. Sci Reports 2025 |
| 毛穴の開き・皮脂過多 | 真皮支持組織のリモデリングによる毛穴縮小、皮脂正常化 | 3〜4回 | Min 2015（皮脂分泌有意減少） |
Efficacy for Acne Scars: RCT Evidence
Min et al. (Archives of Dermatological Research 2015) conducted a randomized split-face comparison of FMR and bipolar RF (BR) in 20 patients with both acne and scarring. The FMR side showed an 80% reduction in inflammatory acne and a 65% reduction in non-inflammatory acne, and significantly outperformed BR in improving icepick- and boxcar-type scars. Additionally, a significant reduction in sebum secretion and histological confirmation of suppressed NF-κB and IL-8 expression were observed, revealing a molecular-level mechanism of action.
Efficacy for Age-Related Skin Changes
Kauvar et al. (Lasers in Surgery and Medicine 2022) performed 6 treatment sessions in 9 subjects, achieving a significant improvement in Fitzpatrick Elastosis Wrinkle Scale (FEWS) scores from 4.33 to 3.33 (p<0.005). 88.9% of subjects showed overall aesthetic improvement. All subjects completed the treatments without downtime, and histological analysis confirmed re-epithelialization and collagen remodeling within 13 days.
Hwang et al. (Scientific Reports 2025) administered 4 MNRF sessions to 29 elderly women with a mean age of 65.8 years and confirmed improvements in elasticity, hydration, wrinkles, and TEWL (transepidermal water loss). Compared with microneedling alone, significant increases in collagen and elastin and a significant reduction in senescent fibroblasts (p21-positive cells) were observed, providing histological proof of the added benefit of RF.
Downtime and Safety
Immediately after treatment, transient pinpoint bleeding, redness, and edema may occur, but these typically resolve within 2–3 days. In Kauvar et al. (2022), no adverse events were reported across 6 treatment sessions, and all subjects continued treatment without disruption to daily activities. Min et al. (2015) also reported "no serious adverse events other than erythema in either the FMR or BR group." By adjusting needle depth and RF output, treatment can be performed safely even in Fitzpatrick skin types III–IV.
POTENZA at Zetith
At Zetith Beauty Clinic, needle depth, RF output, and mode (monopolar/bipolar) are individually tailored to the type of concern, its severity, and the patient's skin type. For deep crater-type acne scars, a deeper bipolar mode setting is used; for wrinkles and laxity, monopolar mode delivers uniform energy over a broad area — all following evidence-based treatment protocols. Please feel free to consult us at a counseling session first.