Final answer:
The Galvanic method uses multiple needles to damage the hair-producing papilla, making it different from depilation methods like chemical depilatories, which weaken the hair structure but do not stop hair growth permanently.
Step-by-step explanation:
The hair removal method that uses multiple needles to destroy the papilla is known as Galvanic electrolysis. This method involves inserting a tiny needle into each hair follicle and using an electric current to damage the papilla, which is responsible for hair growth. Comparatively, Blend is another type of electrolysis that combines galvanic (direct current) and thermolysis (alternating current), waxing physically removes the hair from the root, and shaving cuts the hair at the skin's surface. None of these, however, use multiple needles apart from the Galvanic method.
In contrast to depilation methods, such as using a chemical depilatory which contains active ingredients like calcium thioglycolate to break down the hair structure, electrolysis aims for permanent hair removal by targeting the hair follicle itself. Chemical depilatories work by weakening the keratin in the hair, eventually causing the hair to become fragile and easily wiped away. Despite being effective hair removal methods, depilation approaches, like chemical depilatories and shaving, do not destroy the hair follicle and thus, hair will typically grow back.