There is no such code as D6078 your choices for the abutment supported fixed denture would be D6075-D6077 depending on the type of material you are utilizing (example porcelain fused to metal, cast metal or ceramic). You will further want to bill for the connector bar using CDT code D6055 and any pre-surgical services such as radiograph's using CDT code D6190. The tempoary immediate prosthesis code you would utilize is D6999.