Nonpermanent fillers and permanent fillers

Abstract

Prepackaged injectable soft-tissue augmentation materials are extremely safe substances [1]. In vivo, they are associated with benign and remitting short-term effects. Medium-term effects are infrequent, and given the nonpermanent nature of the injectables, long-term effects are virtually absent. Interestingly, despite the differences in composition among the various common nonpermanent soft-tissue augmentation materials, they are remarkably similar in the type and frequency of their undesired effects.