PMID- 30180229 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - Int J Prosthodont JT - The International Journal of Prosthodontics IS - 1942-4426 (Electronic) IS - 0893-2174 (Print) IP - 5 VI - 31 PST - ppublish DP - 2018 PG - 451-452 LA - en TI - Fracture Strength of Ceramic Posterior Occlusal Veneers for Functional Rehabilitation of an Abrasive Dentition LID - 10.11607/ijp.5817 [doi] FAU - von Maltzahn, Nadine Freifrau AU - von Maltzahn N FAU - El Meniawy, Omar Ibrahim AU - El Meniawy O FAU - Breitenbuecher, Niko AU - Breitenbuecher N FAU - Kohorst, Philipp AU - Kohorst P FAU - Stiesch, Meike AU - Stiesch M FAU - Eisenburger, Michael AU - Eisenburger M CN - AB - Purpose: To evaluate the load at fracture and influence of artificial aging of posterior teeth occlusal veneers ("table tops") made of two different ceramics. Materials and Methods: A total of 80 table tops were produced from feldspathic ceramic (VM) and zirconia-reinforced lithium silicate ceramic (CD) using computer-aided design/computer-assisted manufacturing (CAD/CAM). Half of the specimens from each ceramic were aged prior to the load test. Results: Mean ± standard deviation (SD) load at fracture was significantly higher for CD (1,571.1 N ± 297.0 N) than for VM (573.6 N ± 86.4 N) (P < .001). After aging, load at fracture increased significantly to 1,819.0 N (± 310.6 N) for CD and to 745.2 N (± 168.3 N) for VM. Conclusion: The use of zirconia-reinforced lithium silicate ceramic for molar nonprep table tops should be uncomplicated according to the high load-at-fracture values. Mechanical stability of either ceramic is not compromised by aging. AID - 850025