making a conventional bridge for a 12-year-old is not standard practice. the child is still growing and teeth still move. generally any definitive dental work is not done until a child has stopped growing (age 16-18 for girls 18-21 for boys). you should consider transitional work for your child while he is growing. this transitional work can be accomplished with removable devices such as a denture (flipper) for the missing teeth a "snap-on smile" device which is a transitional plastic bridge that "snaps-on" the adjacent teeth and replaces the missing ones. other options can be accomplished with orthodontics (braces). the most trained person to consult with is a prosthodontist which is the specialist in restorative cosmetic and implant dentistry. the most important thing to remember is that your child is very young and cutting down his brand new perfectly healthy teeth to make a bridge is not very smart. many times a dentist can bond "fake teeth" to the adjacent teeth and solve the problem in a very "non-invasive" manner. this all has to be evaluated by a dentist who will consider your child rather than the procedures.
my son 12 lost two front teeth that were put back in at the er. should his dentist put in a permanent bridge? . they died but stayed in place until a gym mishap loosened one.