Abstract: A tooth positioning kit in a dental model enabling the lateral and outward adjustment of a neighbor tooth on either side of a tooth being fitted with a crown. The kit comprises a receptacle fixedly positioned in the base of the dental model, interchangeable first and second adapters for insertion in and removal from the receptacle, and a tooth-support insert that is attached to the neighbor tooth and the corresponding gum segment and is insertable in and removable from either adapter. When the first adapter is in the receptacle and receives the tooth-support insert, the neighbor tooth is at the exact position of the corresponding tooth in the patient's mouth. When the second adapter is in the receptacle and receives the tooth-support insert, the neighbor tooth is farther away from the tooth being fitted with a crown and is farther out from the base of the dental mold.