[Design of custom-shaped abutments for single-tooth crowns on implants].

Single-tooth implants have become a predictable treatment option. Acceptable esthetics are an important factor for success. The emergence profile of the crown in the cervical region is complicated by the discrepancy between the round shape and the small diameter of the implant and the desired anatomical shape of the crown. An abutment on an implant has to provide this natural looking emergence profile and has to support the crown. Custom-shaped abutments are the best option for this task. Many items influence the design. This article discusses a set of guidelines for the design of custom-shaped abutments for single-tooth implants.