TY - JOUR T1 - Fracture Resistance of Titanium-Based Lithium Disilicate and Zirconia Implant Restorations. AU - Roberts,Evan E, AU - Bailey,Clifton W, AU - Ashcraft-Olmscheid,Deborah L, AU - Vandewalle,Kraig S, Y1 - 2018/02/08/ PY - 2017/11/06/accepted PY - 2018/2/9/pubmed PY - 2019/1/30/medline PY - 2018/2/9/entrez KW - Fracture strength KW - implant abutments KW - implant crowns SP - 644 EP - 650 JF - Journal of prosthodontics : official journal of the American College of Prosthodontists JO - J Prosthodont VL - 27 IS - 7 N2 - PURPOSE: To evaluate the fracture resistance of a newer lithium disilicate abutment material. MATERIALS AND METHODS: A premolar-shaped implant crown was designed using CAD/CAM software, and four groups of implant and crown combinations were milled: (1) lithium-disilicate hybrid-abutment crown; (2) "screwmentable" lithium-disilicate hybrid abutment/lithium-disilicate crown with screw channel; (3) lithium-disilicate hybrid abutment/lithium-disilicate crown; and (4) zirconia hybrid abutment/lithium-disilicate crown (control). The specimens were cemented to a titanium-base implant system, subjected to thermocycling and cyclic loading, and fractured in a material testing device. RESULTS: The lithium-disilicate hybrid-abutment crown had significantly greater fracture load than all the other groups, which were not significantly different from each other. CONCLUSIONS: Based on fracture load, the new lithium-disilicate hybrid-abutment material may serve as a viable alternative to the use of zirconia as a hybrid-abutment material. SN - 1532-849X UR - https://www.unboundmedicine.com/medline/citation/29417647/Fracture_Resistance_of_Titanium_Based_Lithium_Disilicate_and_Zirconia_Implant_Restorations_ DB - PRIME DP - Unbound Medicine ER -