title: An analysis of follicular punches, mechanics, and dynamics in follicular unit extraction.
abstract: Success in follicular unit extraction requires an understanding of forces, fluid dynamics, instrumentation, and individual patient variation. Sharp punches require a lower axial and tangential force to dissect follicular groups. The angle of hair emergence and the size of a punch influence the wound size and the depth of an incision. A procedure must be individualized based on surface follicular group characteristics; hair splay; and strength of attachment between the outer root sheath, inner root sheath, and adipose with regard to hair follicles.
authors.affiliation: Private Practice, 1070 Powers Place, Alpharetta, GA 30009, USA. Electronic address: john@forhair.com.
authors.forename: John P
authors.initials: JP
authors.lastname: Cole
mesh_terms: D003357:Cosmetic Techniques / Q000295:instrumentation; D062109:Dermatologic Surgical Procedures / Q000295:instrumentation / Q000379:methods*; D006197:Hair / Q000637:transplantation; D018859:Hair Follicle / Q000637:transplantation*; D006801:Humans; D020858:Tissue and Organ Harvesting / Q000295:instrumentation / Q000379:methods*; D014182:Transplantation, Autologous / Q000295:instrumentation / Q000379:methods
keywords: Follicle splay; Follicle transection; Follicular dissection; Follicular unit extraction; Follicular unit punch; Hair transplant; Hair transplant surgery; Punch size; Serrounded punch; Trephine