Hi, I have performed many facial shaping procedures using dermal fillers, silastic facial implants (cheek, chin or lip implants), liposuction and/or facelifts for over 30 years. Yes, when a temporary dermal filler completely dissolves you would need to re-inject the same (or a similar) amount in the same pattern in order to achieve similar aesthetic results. If you're looking for permanent results, this would require placement of silastic implants that work best in the cheek, chin and lip areas. Permanent fillers have too many unwanted side effects and fat despite its recent popularity offers far less of a reliable shaping volume than an off the shelf filler or silastic implant.Hope this helps.