The Dental Advisor has selected Ivoclar Vivadent’s IPS e.max Press lithium disilicate glass ceramic as one if its 2018 Top Award Winners in its Long-Term Performers category, following a five-year study. With 671 IPS e.max Press restorations placed during that period, 381 were evaluated at their recall. Most were anterior and posterior crowns, as well as inlays and onlays. According to Ivoclar Vivadent, 97% of the restorations received a five-star or excellent rating.
Many of the patients remarked positively about the aesthetics of the restorations. Only 6% of them were slightly opaque and lacked sufficient translucency. The Dental Advisor reports, however, that this could be due to inappropriate ingot selection. Specifically for this purpose, Ivoclar Vivadent has developed the IPS e.max Shade Navigation App to ensure the right ingot is selected.
Also, less than 2% of the restorations evaluated exhibited fractures or chipping. This rate is less than half the average fracture rate of ceramics documented by the Dental Advisor over the past 27 years. Plus, only 4% of the restorations debonded and needed to be recemented. This rate is similar to the debonding results of other all-ceramic restorations monitored over the past 27 years, and it is related to the preparation and the cement, rather than the ceramic.
Noting its aesthetics, strength, and durability over the five-year study, Ivoclar Vivadent says that IPS e.max Press has exceeded the performance of traditional porcelain-fused-to-metal restorations as well as all-ceramic restorations.