How Long Can Microdermabrasion Results Last?

Microdermabrasion is only supposed to remove the epidermis. However most scarring from acne occurs in the dermis. Therefore technically it will have little if any permanent effect. True dermabrasion is performed into the dermis which can have long term and permanent effects but involves substantially more risks and costs.

Microdermabrasion and peels can help mild scars. Peels are good for acne. First, treat your acne then move on to treating the scars. Results from both can be long lasting or short term, depending on your but lifestyle habits and your skin's makeup.  

My personal preference for the treatment of depressed, broad-based acne scarring is Injectable Fillers. Ice-pick scars, and enlarged pores do not respond well to Fillers.
I've attached a link to Acne Scarring photos for your perusal.
I hope this is helpful for you. 

Microdermabrasion and peels can help mild scars. Peels are good for acne. First, treat your acne then move on to treating the scars. Results from both can be long lasting or short term, depending on your but lifestyle habits and your skin's makeup.Maintenance sessions are important for any treatment as our skin also keeps regenerating every 28 days.

Thank you for your question! Lasting effects are dependent on proper skin care.  Additional treatments will renew your youthful appearance.  A series of six treatments over a few months is recommended for best results, followed by regular maintenance treatments. However everyone is different and response to cosmetic treatments can vary from person to person. Best of luck!