January 2021 in “Advanced Biomedical Engineering” This study found that hair implant needles with longer point lengths and smaller bevel angles required less total work for insertion, which corresponded with surgeons' perceptions of insertion force differences.
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.
June 2026 in “Journal of Cutaneous and Aesthetic Surgery” This review proposes an anatomy-based framework for understanding recipient site scalp necrosis in hair transplantation, emphasizing regional vascular vulnerability and surgical factors, but does not provide new clinical results.
4 citations
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May 2019 in “Journal of Cosmetic Dermatology” This study found that patients experienced less pain when using a 1-mL syringe compared to a 3-mL syringe, despite both having the same needle size.
17 citations
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January 1999 in “Journal of Molecular Structure” This study determined the molecular structure of finasteride and its related crystalline forms, highlighting different hydrogen-bond interactions and structural configurations in various crystalline complexes.