Key transfer technique for restoring implants with extreme cervix proximity in the esthetic zone: a case report

Extreme cervix proximity of adjacent implants poses a great challenge to the restorative dentist, as accurate transfer of implant analogs to the master cast would be difficult to achieve. In this case report, a custom key transfer technique was used to precisely duplicate the relation of 2 implants (replacing maxillary left central and lateral incisors with severe cervix proximity) from the patient's mouth to the master cast. The relation of each implant was singularly transferred to a preliminary cast, and then the 2 implant analogs were positioned in a master cast for accurate clinical case reproduction. The completed master cast allowed for precise fabrication of superstructures that accurately fitted the closely related implant cervices in the patient's mouth.