Fracture Resistance of CAD/CAM Lithium Disilicate of Endodontically Treated Mandibular Damaged Molars Based on Different Preparation Designs

Figure 2

Schematic representation of the fracture patterns. (1) Detachment of the crown without fracture; (2) fracture without detachment of the crown and presence of a crack in the remaining tooth structure; (3) fracture with partial detachment of the crown and presence of a crack in the remaining tooth structure; and (4) fracture with partial detachment of the crown and the remaining tooth structure.