Gap in upper teeth. What is the best solution? (Photo)

Gaps can be corrected with dental veneers, dental bonding and orthodontics. Each have their pros and cons and the prognosis of how long they will last you. Your best option is to see an expert cosmetic dentist in your area, so your bite and occlusion can be checked also! 
The ideal type of procedure you get is relevant to the functionality!! Dental bond will be the least invasive if you choose not to do braces!

Closing the gaps can be done with porcelain veneers or bonding.But the bigger concern is that you feel these gaps increasing in size.That has to do with fewer back teeth to chew on, so there is more chewing occurring on the front teeth. This forces them outwardtoward your lip, opening up bigger spaces.Your first order of treatment should be to obtain more back teeth tochew on. Then, closing spaces and keeping them closed is morepredictable.

Hi:You have two options: 1.  Bonding2.  Porcelain veneersPorcelain veneers are the best long term options, however they are more expensive and require tooth reduction.  You can always start with bonding and switch to porcelain veneers later on in life.Best,Dr. Maddahi