Int J Periodontics Restorative Dent 40 (2020), No. 2 7. Feb. 2020
Int J Periodontics Restorative Dent 40 (2020), No. 2 (07.02.2020)
Page 193-201, doi:10.11607/prd.3597, PubMed:32032402
CAD/CAM Implant Abutments: Peri-implant Hard and Soft Tissue Response with Up to 4 Years of Follow-up— A Retrospective Cohort Study Evaluation
Parpaiola, Andrea / Toia, Marco / Norton, Michael / Cecchinato, Denis / Bressan, Eriberto / Lops, Diego
This retrospective study evaluated hard and soft tissue response and reported mechanical and technical complications around computer-aided design/ computer-assisted manufactured (CAD/CAM) abutments. A total of 123 patients restored with titanium, gold-hue titanium, and zirconia CAD/CAM abutments were included (N = 291). Each patient was followed up for at least 2 years. Clinical and radiographic parameters were assessed annually and complications were recorded. No implant or reconstruction failures were reported. One fracture of a zirconia abutment occurred. The prosthetic survival rate after 4 years of function for restorations and abutments was 100% and 99.66%, respectively. No significant differences in biologic and radiographic indices were found. The bleeding on probing index was positive at 42% of implant sites, and it had no significant correlation with the overall change in marginal bone level (0.02 mm) of bone gain. The short-term survival of CAD/ CAM abutments was reliable, no matter of the material used for manufacturing.