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Fifty endodontically addressed mandibular first molar teeth had been divided into five groups (n = 1. Endocrowns had been acquired from lithium disilicate glass porcelain ingots by heat-press strategy (Group e.max Press GEP), and from feldspathic blocks (Group Cerec GC), polymer infiltrated porcelain system obstructs (Group Enamic GE), lithium disilicate glass porcelain blocks (Group e.max CAD GEC), and zirconia-reinforced cup ceramic obstructs (G