Face
Atrophic scars are usually thinner in depth, depressed and crater form. Fillers such as hyaluronic acid raise them to surface level and last 1 year; silicone, which is permentant is very effective if injected by the microdroplet technique. Combined with fractional CO2 laser resufacing improvement can be in the 60-70% range.
It really depends on the actual type of scar. Most acne scars are classified as ice pick, box car, or rolling scars. Some scars can also be simply lighter in color (hypopigmented) or darker (hyperpigmented). For rolling scars (ones that look normal if you stretch the skin) you can have a filler substance such as Restylane injected to fill them out. That is a quick treatment with very little downtime. A surgical treatment, such as Subcision, can also be used to release the tethering bands of collagen that are pulling the skin down. Check with a dermatologic surgeon to see which treatment is right for your type of scar. Best to you.