LAUSR

ABSTRACT Objective To assess the clinical, radiographic and patient‐reported outcome measures, and the success of screw‐retained one‐piece monolithic zirconia implant‐supported restorations in the posterior region during a 1‐year follow‐up. Methods In a prospective case series, 50 single molar sites in the posterior region of 41 patients with a minimum age of 18 years and sufficient bone volume for placing an implant (≥ 8 mm) and space for an anatomical restoration were included. Following prosthetic‐driven digital three‐dimensional treatment planning, a tissue‐level implant with an internal connection was inserted during a one‐stage surgical procedure. Three months later, the implant was restored with a screw‐retained one‐piece monolithic zirconia restoration. Clinical, radiographic and patient‐reported outcome measures, and restoration survival and success according to the modified USPHS criteria were assessed at baseline prior to and immediately after implant placement, and 1‐month and 1‐year after definitive restoration placement. Results At the 1‐year follow‐up, 1 implant had been lost (implant survival rate 98%) hence, 49 restorations were evaluated. The restoration survival and success rates were 100% and 98%, respectively. Plaque, calculus, bleeding and suppuration on probing and peri‐implant inflammation were absent in most cases. The mean (SD) marginal bone level change between implant placement and the 1‐year follow‐up was −0.14 mm (0.27) on the mesial and −0.25 mm (0.31) on the distal side. The mean (SD) patient satisfaction (0–10) was 9.2 (0.8) at the 1‐year evaluation. Conclusion One‐piece monolithic zirconia implant‐supported restorations exhibited favourable outcomes over 1 year in situ. Trial Registration: Registered in the National Trial Register (NL9059)