Palatal Expansion with Existing Veneers? (photo)

I am 25 yrs old. When I was 8/9 yrs, I was set to get braces. I had many extractions done & molds prepared. My cousins teased me about getting braces and I begged my parents not to. I only have 24 teeth total. I had no further extractions from since I was a kid. At 21, I had veneers on 8 upper front teeth including bicuspids & 6 lower front teeth. My problem is my arch is so narrow, my bite and teeth are ok but I can't see much teeth when I smile & I see empty space to the sides. What can I do?

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