Infected facial tissue fillers: case series and review of the literature.

Since 2007, 21 female and 1 male patient aged 25 to 55 years, who either did not have any obvious causative infection source or, despite the presence of nonvital teeth, did not display typical symptoms of odontogenic infection, were treated for acute facial inflammation. All these patients admitted previous application of injectable soft tissue fillers (ISTFs) performed in either private plastic surgery and dermatology practices or cosmetic salons. The period between injection and infection varied from 1 week to 6 years.