Do hyaluronic acid filling nasolabial folds need a needle?

Collagen injection can be used to remove wrinkles, which is widely used to restore facial wrinkles and soft tissue defects. Its trade name is zcI (zyderm collage implant) ZCL has the same composition as human collagen tissue, so it has good compatibility, its foreign body reaction and hypersensitivity reaction are extremely small, and its hardness is similar to the structure of the tissue around the injection site. Non-carcinogenic, can be sterilized for use. In order to achieve the elimination of wrinkles. Collagen should be injected into the superficial dermis. Local skin mounds will appear during injection, when collagen overflows from the mouth of the sebaceous glands. It indicates that the injection volume is sufficient. Within 21 h of the injection session. The volume of injected collagen decreases due to water absorption. Therefore, injection often requires overcorrection of the rod.

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