Wear and Fracture Strength of New Ceramic Resins for Chairside Milling.

Karina Zierden, Johannes Acar, Peter Rehmann, Bernd Wöstmann

International Journal of Prosthodontics 2018 January

PURPOSE: The purpose of this in vitro study was to evaluate wear and fracture strength of chairside-milled new ceramic resins after artificial aging in a chewing simulator.

MATERIALS AND METHODS: Two ceramic resins (Lava Ultimate and Vita Enamic) and two conventional ceramics (IPS Empress CAD and Celtra Duo) were tested. For analysis of wear, baseline and follow-up scans of the specimens were made, the scans were superimposed, and the wear was calculated. To determine fracture strength, the specimens were loaded until they fractured.

RESULTS: Lava Ultimate showed the highest wear, caused the lowest wear of the opposing dentition, and showed statistically significantly higher fracture strength than conventional ceramics after cyclic loading.

CONCLUSION: New ceramic resins for chairside milling are a good alternative to conventional ceramics.

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