Different regulatory standards in Europe have catapulted hyaluronic acid-based fillers to the top of that market, with many more types available than in the U.S., experts say. High-cohesivity fillers are often used in body and buttocks remodeling, while low-cohesivity fillers are reserved for facial rejuvenation and filling fine lines. European plastic surgeons typically use a cannula for injections because it has a lower risk for pain, bruising, embolism and hematoma formation.

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