Resistance fracture of minimally prepared endocrowns made by three types of restorative materials: a 3D finite element analysis

• DOI: 10.1007/s10856-021-06610-x
• Publication Date: 2021-10-30T11:02:42Z
• Authors: Qingzhen Meng; Yuejiao Zhang; Danlu Chi; Qimei Gong; Zhongchun Tong
• Keywords: Finite element analysis (FEA); Finite Element Analysis; Minimum principal stress (MinPS); Biocompatible Materials; Biomaterials Synthesis and Characterization; Dental Materials; 03 medical and health sciences; Endocrown; 0302 clinical medicine; Materials Testing; TA401-492; Medical technology; Humans; Stress, Mechanical; Maximum principal stress (MaxPS); R855-855.5; Dental Restoration, Permanent; Materials of engineering and construction. Mechanics of materials

A thin endocrown restoration was often applied in endodontically treated teeth with vertical bite height loss or inadequate clinical crown length. model of mandibular molars made by 1 mm thickness and 2 depth pulp chamber constructed imported into FEA ANSYS v18.0 software. The three CAD/CAM materials, feldspathic (Mark2), lithium disilicate (EMAX), lava ultimate (LU), were assigned, the five load indenters loaded on full occlusal (FO), center (OC), central fossa (CF), buccal groove (BG), mesiobuccal cusp (MC) model. MinPS MaxPS significantly higher than those tooth tissue types loads except for LU FO group. smaller contact surface was, were. MC highest, followed BG CF restoration. In stress distribution tissue, accumulated at external edge enamel Mark2 EMAX concentrated wall dentin under OC, loads. Within limitations this study, transferred more to EMAX, maximum principal that load.