Except in some very specific regions, an incision perpendicular to the skin surface permits the wound margins to be reapproximated in an accurate, layer-to-layer fashion. Incisions performed obliquely to the surface of the skin are susceptible to marginal necrosis and overlapping of the edges during closure. Incisions in hair-bearing tissue, however, should parallel the direction of the hair so that fewer follicles are transected. An oblique incision requires a more meticulous closure because of the tendency of the margins to overlap during suturing. Subcutaneous may have to be placed more deeply to avoid necrosis of an oblique edge overlap
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