100 citations
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July 2006 in “British Journal of Dermatology” This study found that intralesional triamcinolone acetonide injections using a needleless injector led to rapid hair regrowth in patients with limited alopecia areata, while lasting growth was rare in alopecia totalis.
1 citations
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September 2019 in “Hair transplant forum international” This article introduces a needleless microjet injector using laser pulse energy for tattoo pigments in scalp micropigmentation, highlighting an almost painless procedure without anesthesia.
June 2026 in “Frontiers in Cell and Developmental Biology” In this review, researchers examined how needle gauge and length impact the viability of human stem cells during injections, emphasizing the balance between minimizing tissue trauma and preserving cell viability to optimize clinical protocols.
January 2024 in “Journal of Cosmetics, Dermatological Sciences and Applications” This study found that electronically-operated pneumatic injections for administering a peptide-hyaluronic acid combination were well tolerated and led to significant improvement in hair density and thickness for men with androgenic alopecia over six months, though the exact mechanism remains uncertain.
September 2010 in “International Society of Hair Restoration Surgery” This article reviews various proprietary methods for local anesthesia in hair surgery but reports no new clinical findings.