To fix a chipped tooth that has created a gap really depends on what is necessary to properly restore the tooth. Does it need a small filling? Does it need a veneer? Does it need a crown? The price would be anywhere from $200 to $2,000 depending on what is done and what area of the country you live in. You will need to see a dentist and have them consult with you on what treatment is needed and how much it will cost.