Do your gums show when you smile?  There is a nonsurgical treatment to help this.  A Botox injection can relax the smile muscles in your upper lip thereby keeping your lip from exposing your gum when you smile.  Botox can also be placed into the lip to help soften the "smoker's lines" which are caused by the lip muscle contraction.  

Smiling Before Botox Injection - Note How Much of the Upper Gums Show 

A Few Weeks After a Botox Injection for Gummy Smile - Botox has Relaxed the Upper Lip Muscle