Computer‐assisted surgery in the rehabilitation of the upper jaw with zygomatic implants – a cohort study comparing atrophic and oncologic patients. Preliminary results at 4 years follow‐up. (8th October 2018) - Pellegrino, Gerardo; Relics, Daniela; Tarsitano, Achille; Basile, Francesco; Grande, Francesco; Marchetti, Claudio