How can I improve my smile/the amount my teeth show? (Photos)

There are surgical and non-surgical approaches to lip augmentation. Non-surgical approaches include botox (slight lift, reducing gum show) and filler (volume restoration). Surgically, you can have two separate incisions under the nose (italian), one incision under the nose (bull horn), one incision at the red/white upper lip junction (gull wing) or two separate incision at the corners, or a combination, depending on your desired look and anatomy. My preferred surgical technique is called the Elelyft, which is a version of the bullhorn approach. 
The ideal candidate for the Elelyft, or upper lip lift, is someone with a philtral length of 15mm or longer, no upper dental show, and/or a thin upper lip. The nasal base to mouth width ratio needs to be taken into consideration to avoid leaving the lip corners down. 
In your situation, additional angles would be needed to provide a full assessment, along with an accurate philtrum measurement. In general, lip fillers or a lip lift will be options for you.
Gary Linkov, MD
Lip Specialist
Manhattan

Thanks for writing,If you want more show you will need to have a lip shortening procedure. You have to be careful that too much is not removed, then you would get a gummy smile which looks very bad. Find Board Certified Plastic Surgeon who can help you understand your options. Good luckStephen M. Davis, MD, FACS
Certified: American Board of Plastic Surgery
Member: American Society for Aesthetic Plastic Surgery
Member: American Society of Plastic Surgeons
Member: RealSelf Hall of Fame