What kind of procedure is recommend for small gap in bottom row teeth? (Photo)

you need to see a dentist for a dental cleaning to remove the calcium build up and evaluate the health of your gums. Sometimes the gap happens due to gum disease and bone loss. If your gap is the result of tooth movement after the back teeth were extracted and gums are healthy, then the gap could be closed by - dental bonding - orthodontic treatment ( braces) good luck 

I recommend finding an orthodontist (a dentist specializing in braces and moving the teeth). That is not a small gap, it's a large gap for the lower teeth. Don't even consider bonding or veneers because they will look terrible without orthodontic movement of the teeth. Your general dentist may also offer Invisalign as a solution. I would still get a second opinion from an orthodontist. It never hurts to get a couple of opinions... it tends to lead to more questions which should be asked before starting treatment. I think you will be very happy with braces or Invisalign. Good Luck!Hank D. Michael, DMD - General, Cosmetic & Implant Dentistry