title: Substances for soft tissue augmentation: collagen and silicone.
abstract: Zyderm injectable collagen and silicone are both used for soft tissue augmentation. Neither is perfect. Critical factors associated with their use include lesion selection and injection technique. Both may have immediate and delayed adverse reactions.
mesh_terms: D003094:Collagen / Q000008:administration & dosage* / Q000009:adverse effects; D004954:Esthetics; D005145:Face; D006801:Humans; D007271:Injections, Intradermal; D012828:Silicones / Q000008:administration & dosage* / Q000009:adverse effects
chemical_list: D012828:Silicones; D003094:Collagen