Dear practo user Braces is the only best and natural treatment for gap closure. You can ask your dentist for discount or EMI. Cheaper options are there, but not very promising. You can get composite build up between the gaps, but they stain and shrink and may look unsightly if not done by a specialist. Then you have veneers but for that we have to prepare the crowns again this is also limiting. First of all if cost is the main reason you can visit any DENTAL college where they do for lesser amounts. But get the right treatment done, and keep costs secondary