The Influence of Thermal Tempering on the Fracture Resistance of Four Heat Pressed Lithia-based glass ceramic Crowns
Khaled Nasser,
Amr S. EL-Etreby,
Soha Osama Nabih
Abstract:Background This in-vitro study aimed to evaluate the impact of thermal tempering and ceramic type on the fracture resistance of four heat-pressed glass ceramics.
Methods A total of 84 glass-ceramic crowns were pressed and randomly allocated into four equal groups (n=21) according to the ceramic type: Group (E): IPS e.max Press, Group (L): GC initial LiSi Press, Group (C): Celtra Press and Group (A): VITA Ambria. The crowns of each group were equally allocated into three subgroups (n = 7) regarding the subsequ… Show more
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