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Lueangarun S, Tempark T. Novel Application of 1064-nm Picosecond Nd:YAG Laser for Male Androgenetic Alopecia Treatment. THE JOURNAL OF CLINICAL AND AESTHETIC DERMATOLOGY 2024; 17:24-27. [PMID: 38298748 PMCID: PMC10826837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Background There are limitations and side effects of currently approved treatments for AGA, such as topical minoxidil, oral finasteride, and low-level light therapy. Objective This study aimed to investigate the potential of fractional picosecond laser (FPL) therapy for promoting hair regrowth. Methods This was a pilot study in which five male participants were treated with a 1064-nm FPL for mild-to-moderate AGA. The patients underwent three treatments at four-week intervals, followed by a four-week post-procedure assessment. Expert panel assessment score and patient satisfaction was assessed using a seven-point scale. Dermoscopic analysis was conducted to evaluate hair shafts. Adverse effects were also monitored. Results Clinical improvement was observed at 1 to 4 months after treatment, with a significant increase in expert panel assessment scores (p<0.001). Patient satisfaction with hair density and thickness also improved significantly at 1 and 4 months (p=0.038 and p=0.007, respectively). Adverse effects were minimal and resolved within a week. Dermoscopic analysis showed minimal petechiae with no hair shaft damage. Conclusion The preliminary study demonstrates the potential of 1064-nm FPL for promoting hair regrowth in male pattern hair loss. Nonetheless, further research is recommended to elucidate and ratify for the optimization of this promising treatment approach.
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Affiliation(s)
- Suparuj Lueangarun
- Dr. Lueangarun is with the Department of Anti-Aging and Regenerative Medicine Medicine, College of Integrative Medicine at Dhurakij Pundit University in Bangkok, Thailand, and the Division of Dermatology at the DeMed Clinic Center in Bangkok, Thailand
| | - Therdpong Tempark
- Dr. Tempark is with the Department of Pediatrics and Faculty of Medicine at King Chulalongkorn Memorial Hospital at Chulalongkorn University in Bangkok, Thailand
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Dai R, Cao Y, Su Y, Cai S. Comparison of 1064-nm Nd:YAG picosecond laser using fractional micro-lens array vs. ablative fractional 2940-nm Er:YAG laser for the treatment of atrophic acne scar in Asians: a 20-week prospective, randomized, split-face, controlled pilot study. Front Med (Lausanne) 2023; 10:1248831. [PMID: 38034535 PMCID: PMC10687437 DOI: 10.3389/fmed.2023.1248831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
Background The 1064-nm Nd:YAG picosecond lasers using fractional micro-lens array (P-MLA) was a promising therapy for skin resurfacing. However, no studies have compared P-MLA with ablative fractional 2940-nm Er:YAG lasers (AF-Er) in the treatment of atrophic acne scars. Objectives To evaluate the efficacy and safety of P-MLA and AF-Er for the treatment of atrophic acne scars. Methods We performed a prospective, randomized, split-face, controlled pilot study. Thirty-one Asian patients with mild to moderate atrophic acne scars underwent four consecutive sessions of randomized split-face treatment with P-MLA and AF-Fr at 4-week intervals. The efficacy of the two devices were evaluated by Echelle d'Evaluation Clinique des Cicatrices d'acne (ECCA) grading scale, Investigator's Global Assessment (IGA) score and patient's satisfaction. VISIA analysis was also performed to evaluate the pore and skin texture. Adverse events were recorded at each follow-up. Results The P-MLA afforded comparable clinical responses in scar appearance as AF-Er based on the investigator's assessments (ECCA percent reduction: 39.11% vs. 43.73%; IGA score: 2.97 ± 0.65 vs. 3.16 ± 0.68; P > 0.05 for both). However, the result of patient satisfaction indicated the AF-Er-treated side achieved a slightly greater improvement in scar appearance (3.97 ± 0.78 vs. 3.55 ± 0.71; P < 0.05). Overall, the two devices did not differ largely in terms of efficacy. VISIA analysis revealed similar changing patterns of the pore and skin texture between two devices. For safety profiles, no serious side effects were reported on both sides. The P-MLA showed lower pain level, shortened duration of crust shed and edema, and less occurrence of PIH (P < 0.05 for all). Conclusion Compared with AF-Er, P-MLA afforded comparable effect and more safety profiles in treating atrophic acne scars in Asian patients. Clinical trial registration ClinicalTrials.gov, identifier NCT05686603.
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Affiliation(s)
- Ru Dai
- Department of Dermatology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yiyu Cao
- Research Department of Industrial Development, Zhejiang Development & Planning Institute, Hangzhou, China
| | - Yiping Su
- Department of Dermatology, The First People Hospital of Hangzhou Linan District, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Suiqing Cai
- Department of Dermatology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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Choi J, Duc TM, Kim H, Hwang JK, Kang HW. Diffractive micro-lens array (DLA) for uniform and selective picosecond laser treatment. BIOMEDICAL OPTICS EXPRESS 2023; 14:1992-2002. [PMID: 37206149 PMCID: PMC10191646 DOI: 10.1364/boe.488024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/29/2023] [Accepted: 03/29/2023] [Indexed: 05/21/2023]
Abstract
Picosecond Nd:YAG lasers using diffractive optical elements (DOE) and micro-lens arrays (MLA) have widely been used in dermatology for the treatment of pigmented lesions and skin rejuvenation. This study designed and developed a new optical element of diffractive micro-lens array (DLA) by combing the features of DOE and MLA in order to achieve uniform and selective laser treatment. Both optical simulation and beam profile measurement demonstrated that DLA created a square macro-beam consisting of multiple micro-beams in a uniform distribution. Histological analysis confirmed that the DLA-assisted laser treatment generated micro-injuries at various skin depths from the epidermal layer to the deep dermal layer (up to 1200 µm) by adjusting the focal depths while DOE showed shallow penetration depths and MLA created non-uniform micro-injury zones. The DLA-assisted picosecond Nd:YAG laser irradiation can provide a potential benefit for pigment removal and skin rejuvenation via uniform and selective laser treatment.
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Affiliation(s)
- Jongman Choi
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
| | - Ta Minh Duc
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
| | | | - Jewan Kaiser Hwang
- Mymirae Research Institute for Dermatologic Science, Seoul, Republic of Korea
| | - Hyun Wook Kang
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
- TeCure, Inc., Busan, Republic of Korea
- Department of Biomedical Engineering and Marine-integrated Biomedical Technology Center, Pukyong National University, Busan, Republic of Korea
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Truncal Acne and Scarring: A Comprehensive Review of Current Medical and Cosmetic Approaches to Treatment and Patient Management. Am J Clin Dermatol 2023; 24:199-223. [PMID: 36539678 DOI: 10.1007/s40257-022-00746-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2022] [Indexed: 12/24/2022]
Abstract
Acne vulgaris is one of the most common skin disorders worldwide. It typically affects skin areas with a high density of sebaceous glands such as the face, upper arms, chest, and/or back. Historically, the majority of research efforts have focused on facial acne vulgaris, even though approximately half of patients with facial lesions demonstrate truncal involvement. Truncal acne vulgaris is challenging to treat and poses a significant psychosocial burden on patients. Despite these characteristics, studies specifically examining truncal acne vulgaris are limited, with treatment guidelines largely derived from facial protocols. Therefore, truncal acne remains an understudied clinical problem. Here, we provide a clinically focused review on the epidemiology, evaluation, and available treatment options for truncal acne vulgaris. In doing so, we highlight knowledge gaps with the goal of spurring further investigation into the management of truncal acne vulgaris.
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Han HS, Hong JK, Park SJ, Park BC, Park KY. A Randomized, Prospective, Split-Face Pilot Study to Evaluate the Safety and Efficacy of 532-nm and 1,064-nm Picosecond-Domain Neodymium:Yttrium-Aluminum-Garnet Lasers Using a Diffractive Optical Element for Non-Ablative Skin Rejuvenation: Clinical and Histological Evaluation. Ann Dermatol 2023; 35:23-31. [PMID: 36750455 PMCID: PMC9905855 DOI: 10.5021/ad.22.070] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 07/07/2022] [Accepted: 10/12/2022] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND The advent of fractionated picosecond (ps) lasers has provided an opportunity to explore new ways of creating microinjuries in the skin to induce skin rejuvenation. OBJECTIVE To compare the efficacy and safety of diffractive optical element (DOE)-assisted ps neodymium: yttrium-aluminum-garnet (Nd:YAG) lasers with 532-nm and 1,064-nm wavelengths (532-nm and 1,064-nm Nd:YAG P-DOE) using a novel fractional handpiece for the treatment of photoaged skin. METHODS An ex vivo guinea pig skin experiment was performed by evaluating the histology of the skin after 532-nm Nd:YAG P-DOE irradiation. A randomized, prospective, split-face study was performed on eight subjects with 532-nm and 1,064-nm Nd:YAG P-DOE. RESULTS Based on the histological evaluation using ex vivo guinea pig skin, a reasonable safety profile and the potential to generate effective skin rejuvenation was observed using the 532-nm Nd:YAG P-DOE. Results demonstrated that both 532- and 1,064-nm Nd:YAG P-DOE were similarly effective in improving skin texture and skin pores; however, 532-nm Nd:YAG P-DOE was more effective in treating dyspigmentation. CONCLUSION At a preliminary level, this study revealed that 532-nm and 1,064-nm ps Nd:YAG lasers using DOE fractional technology may improve photoaged skin. In conclusion, 532-nm Nd:YAG P-DOE may be especially beneficial for skin with epidermal pigmentary lesions.
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Affiliation(s)
- Hye Sung Han
- Department of Dermatology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jun Ki Hong
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Su Jung Park
- Department of Dermatology, Chungnam National University Sejong Hospital, Sejong, Korea
| | - Byung Cheol Park
- Department of Dermatology, College of Medicine, Dankook University, Cheonan, Korea
| | - Kui Young Park
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea.
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Lim SH, Seo HS, Lee YB, Kang H, Hong SP. Morphologic and molecular biologic analyses of the skin rejuvenation effect of the fractional 1064-nm picosecond laser: An animal study. Lasers Surg Med 2023; 55:190-199. [PMID: 36573446 DOI: 10.1002/lsm.23623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 11/19/2022] [Accepted: 11/30/2022] [Indexed: 12/28/2022]
Abstract
OBJECTIVES Application of the picosecond laser in the field of dermatology has expanded from tattoo removal to skin rejuvenation on a clinical basis. Although various mechanisms of pigment removal have been elucidated, the molecular changes associated with skin rejuvenation have yet to be identified. The aim of this study was to explore the theoretical basis and to evaluate the efficacy of skin rejuvenation using a 1064-nm fractional picosecond laser in a mouse model. METHODS We conducted an in vivo study using a fractional picosecond laser on the skin of old and young female hairless mice and performed topographical, histological, micro-, and electron microscopic assessments. RESULTS The topography of the skin surface was enhanced and showed increased dermal thickness on histological examination. Electron microscopy revealed disarranged collagen bundles with microspaces and vascular leakage in the upper dermis. Levels of collagen synthesis markers and various inflammatory cytokines, such as procollagens, interleukin-1β, tumor necrosis factor-α, and heat shock proteins, were elevated in the laser-treated skin. CONCLUSIONS This study provides a possible mechanism for the skin rejuvenation effect of fractional picosecond laser that has been reported previously in clinical observations. Based on our findings, the fractional picosecond laser could be widely applied in clinical settings where dermal regeneration and promotion of skin rejuvenation is required.
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Affiliation(s)
- Sung Ha Lim
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Hee Seok Seo
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Young Bin Lee
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Hyun Kang
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Seung Phil Hong
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
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Lim SH, Jung SW, Seo HS, Pi LQ, Hong SP. Fractional 1064-nm picosecond Nd:YAG laser promotes hair regrowth in BALB/c mice. J Cosmet Dermatol 2022; 21:5236-5237. [PMID: 35390215 DOI: 10.1111/jocd.14977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/29/2022] [Accepted: 04/05/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Sung Ha Lim
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Seung-Won Jung
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Hee Seok Seo
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Long-Quan Pi
- Department of Dermatology, Yanbian University Hospital, Yanji, China
| | - Seung Phil Hong
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
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In Vivo Identification of Skin Photodamage Induced by Fractional CO2 and Picosecond Nd:YAG Lasers with Optical Coherence Tomography. Diagnostics (Basel) 2022; 12:diagnostics12040822. [PMID: 35453872 PMCID: PMC9027631 DOI: 10.3390/diagnostics12040822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/17/2022] [Accepted: 03/24/2022] [Indexed: 12/04/2022] Open
Abstract
Fractional laser treatment is commonly used for dermatological applications, enabling effective induction of collagen regeneration and significantly reducing recovery time. However, it is challenging to observe laser-induced photodamage beneath the tissue surface in vivo, making the non-invasive evaluation of treatment outcomes difficult. For in vivo real-time study of the photodamage induced by fractional pulsed CO2 and Nd:YAG lasers commonly utilized for clinical therapy, a portable spectral-domain optical coherence tomography (SD-OCT) system was implemented for clinical studies. The photodamage caused by two lasers, including photothermal and photoacoustic effects, was investigated using OCT, together with the correlation between photodamage and exposure energy. Additionally, to investigate the change in the optical properties of tissue due to photodamage, the attenuation coefficients and damaged areas of normal skin and laser-treated skin were estimated for comparison. Finally, the recovery of the exposed skin with both lasers was also compared using OCT. The results show that OCT can be a potential solution for in vivo investigation of laser-induced tissue damage and quantitative evaluation.
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Leung AK, Barankin B, Lam JM, Leong KF, Hon KL. Dermatology: how to manage acne vulgaris. Drugs Context 2021; 10:dic-2021-8-6. [PMID: 34691199 PMCID: PMC8510514 DOI: 10.7573/dic.2021-8-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 09/08/2021] [Indexed: 11/29/2022] Open
Abstract
Background Acne vulgaris is the most common skin disease that can lead to disfigurement and psychological distress. This article aims to provide a narrative updated review on the management of acne vulgaris. Methods A PubMed search was performed with Clinical Queries using the key term “acne”. The search strategy included clinical trials, meta-analyses, randomized controlled trials, observational studies and reviews. The search was restricted to articles published in English. Results Treatments of acne include proper skin care, topical medications, oral medications and procedural therapies. Topical agents are the first-line treatment for mild-to-moderate acne and can be used as combination therapy for more severe acne. Systemic therapies are usually prescribed for the initial treatment of moderate-to-severe acne as well as for acne that is refractory to topical therapies. Conclusion Topical retinoids are the drugs of choice for the treatment and maintenance therapy of patients with mild-to-moderate acne vulgaris. Depending on the severity of the acne, topical retinoids may be used alone or in combination with benzoyl peroxide and topical or oral antibiotics. Oral antibiotics are an important therapy for inflammatory acne unresponsive to topical therapy. Neither topical nor oral antibiotics should be used as monotherapy. Oral contraceptives and/or spironolactone are useful for many women with acne. Oral isotretinoin is the drug of choice for severe, extensive, nodular acne vulgaris but is also often used in moderate cases where scarring is evident, acne-related psychosocial distress is significant or other treatment modalities have failed.
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Affiliation(s)
- Alexander Kc Leung
- Department of Pediatrics, The University of Calgary, and The Alberta Children's Hospital, Calgary, Alberta, Canada
| | | | - Joseph M Lam
- Department of Dermatology and Skin Sciences, University of British Columbia and BC Children's Hospital, Vancouver, British Columbia, Canada
| | - Kin Fon Leong
- Pediatric Institute, Kuala Lumpur General Hospital, Kuala Lumpur, Malaysia
| | - Kam Lun Hon
- Department of Paediatrics and Adolescent Medicine, The Hong Kong Children's Hospital, Hong Kong
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