Z-Science 4 In the present study, statistically significant differences were observed between the virtually planned and the actually placed implant positions and among the 5 surgeons. Accuracy of virtually planned and conventionally placed implants in edentulous cadaver maxillae and mandibles: A preliminary report Luc Gillot, Bernard Cannas, Bertil Friberg, Luc Vrielinck, Dennis Rohner and Andreas Pettersson Š Zygoma Implant Group, Dr Vrielinck