Abstract
Purpose : The aim of this study is to evaluate the long-term prognosis and clinical performance of implant-supported lithium disilicate (LS2) single crowns in the molar region.
Materials and Methods:173 patients, 55 males, 118 females, received 383 implant-supported LS2 single crowns. All the subjects had received single implant treatment in the molar region from June 2008 to March 2014 in one private clinic. All the molars were restored by LS2 single crowns retained by cement. The cumulative survival rate of implants, change of superstructures and mechanical complications were retrospectively assessed.
Results : No implants failed. Seven crowns had to be reproduced due to fractures. Three crowns showed small ceramic chipping, but recovered by polishing. The cumulative survival rates of implants and crowns were 100% and 97.2%, respectively, at 5 years after restoration. The mechanical complication rate was 2.6%. There was a statistically significant difference in the mechanical complication rate between the premolar and molar region.
Conclusion : Implant-supported LS2 single crowns in the molar region showed good, long prognosis and high clinical performances during a 5-year follow-up.
