To evaluate and compare dimensional accuracy of casts of implant supported complete denture prostheses obtained through digital means and conventional means Methods: 4 implant analogues were placed in mandibular edentulous model. 10 casts for each groups were fabricated. Digital casts were fabricated using intra oral scanner and 3D printer. Conventional casts were fabricated by open tray splinted impression and pouring with die stone. Master model and all the obtained casts were digitised using lab scanner and the accuracy was measured digitally using Exocad software. Conclusion: Both conventional open tray splinted impression technique and digital impression technique are acceptably accurate for fabrication of the prostheses. Both conventional cast pouring technique and digital 3D printing technique are acceptably accurate for fabrication of the prostheses.