Int J Prosthodont 31 (2018), No. 3 8. May 2018
Int J Prosthodont 31 (2018), No. 3 (08.05.2018)
Page 264-266, doi:10.11607/ijp.5656, PubMed:29723322
In Vitro Fatigue and Fracture Testing of Implant-Supported Anterior Ceramic Crowns
Preis, Verena / Behr, Michael / Rosentritt, Martin
Purpose: To evaluate the fatigue and fracture resistance of anterior implant-supported and tooth-supported crowns made of different monolithic ceramics.
Materials and Methods: Anterior crowns were fabricated of lithium disilicate or one of two zirconia ceramics and were tested as tooth-supported (reference) or as implant-supported crowns with chairside or labside (screw channel) procedures. After thermocycling and mechanical loading (TCML), crowns were loaded to fracture.
Results: All crowns survived TCML. Implant-supported crowns (chairside and labside) showed higher fracture values than tooth-supported crowns. Fracture resistance was comparable or higher for zirconia than for lithium disilicate crowns.
Conclusion: Implant-supported ceramic crowns may withstand clinical anterior loading forces.