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Fracture Resistance of Titanium‐Based Lithium Disilicate and Zirconia Implant Restorations
Author(s) -
Roberts Evan E.,
Bailey Clifton W.,
AshcraftOlmscheid Deborah L.,
Vandewalle Kraig S.
Publication year - 2018
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.12765
Subject(s) - lithium disilicate , cubic zirconia , titanium , materials science , dentistry , fracture (geology) , dental porcelain , implant , composite material , metallurgy , ceramic , medicine , surgery
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.