Influence of margin design and restorative material on the stress distribution of endocrowns: a 3D finite element analysis

Table 4 The normal stress peak (MPa), failure risk of cohesive and adhesive for cement layer

Model	Material	Stress peak	Failure risk
Model	Material	Stress peak	Cohesive	Cohesive
A	Zr	0.55	0.011	0.016
	VS	0.71	0.014	0.021
	IE	0.88	0.017	0.026
	GR	1.42	0.027	0.042
	VC	1.63	0.031	0.048
	CP	3.14	0.061	0.093
B	Zr	0.47	0.009	0.014
	VS	0.57	0.011	0.017
	IE	0.59	0.011	0.017
	GR	1.10	0.022	0.033
	VC	1.24	0.024	0.037
	CP	2.43	0.047	0.072
C	Zr	0.57	0.011	0.017
	VS	0.75	0.014	0.022
	IE	0.90	0.017	0.027
	GR	1.72	0.033	0.051
	VC	1.98	0.038	0.059
	CP	4.24	0.082	0.125
D	Zr	1.48	0.029	0.044
	VS	3.02	0.058	0.089
	IE	4.15	0.080	0.123
	GR	6.66	0.128	0.197
	VC	6.85	0.132	0.203
	CP	43.93	0.846	1.300

A, flat butt joint margin; B, a 20° bevel margin; C, an axial reduction and 1 mm shoulder margin; D, anatomic occlusal preparation margin. Zr, In-Ceram Zirconia; VS, Vita Suprinity; IE, IPS Empress; GR, Grandio blocs; VC, VisCalor bulk; CP, CopraPeek Light

ISSN: 1472-6831