Creating a Natural Hairline in One Session Using a Systematic Approach and Modern Principles of Hairline Design

In 2001, Ronald Shapiro, M.D., introduced a systematic approach to hair transplant surgery aimed at creating a natural, undetectable hairline in a single session. He detailed the construction of a hairline with a "transition zone" and a "defined zone," using one- to three-hair follicular units and a minimum of 400-750 units at a density of 20-25 fu/sq cm. The technique involves careful planning of the hairline's borders and angles, as well as employing selective distribution and micrografts for less traumatic incisions. The paper emphasizes the importance of irregularity and a natural density gradient in the transition zone, and the use of multiple passes to refine the hairline. The document does not report on a study with participants but focuses on the surgical technique, supported by before and after photos of patients.