Improve upper teeth show when smiling? (Photo)

Three Dimensional Expansion of your Maxilla (upper Jaw) is ideal to give better support to your soft tissues and increase tooth exposure.
This will also expand your oral and nasal pharyngeal airway. The third picture shows a lip posture seen in patients with airway issues.

Hi, From your pictures I can suggest some bonding to the edges of teeth to make them more even and less rounded on the edge. Regarding lengths of teeth showing in your natural smile, you are absolutely right, length to width ratio of your teeth is more that average, and you have some gum recession mainly on canines.Your gum bio-type as well as any periodontal pocket should be examined first, there are some options like gum graft, gum releasing and pink bonding available. You will need to have an examination with an experienced cosmetic dentist to find the most suitable option for you.
Dr Sara Amini, City of London