Effect of Marginal Designs on Fracture Strength of High Translucency Monolithic Zirconia Crowns

Table 3

Post hoc Bonferroni multiple comparisons of flexural strength (A, B, C) and duration of fracture (D, E, F) for high translucency monolithic zirconia crowns upon different margin designs, including margin thickness (light chamfer, C_L; heavy chamfer, C_H) and collar height (no collar, N_C; low collar, L_C; high collar, H_C).

Post hoc multiple comparisons of flexural strength
(A) As a function of margin thickness			(B) As a function of collar designs
Thickness	CL	CH	Design	NC	LC	HC
CL	1	0.001	NC	1	1	1
CH		1	LC		1	1
			HC			1
(C) As a function of margin thickness and collar height
Group	CLNC	CLLC	CLHC	CHNC	CHLC	CHHC
CLNC	1	1	1	0.084	0.009	0.024
CLLC		1	1	0.020	0.002	0.005
CLHC			1	0.006	0.001	0.001
CHNC				1	1	1
CHLC					1	1
CHHC						1
Post hoc multiple comparisons for duration of fracture
(D) As a function of margin thickness			(E) As a function of collar designs
Thickness	CL	CH	Design	NC	LC	HC
CL	1	0.001	NC	1	0.204	0.279
CH		1	LC		1	1
			HC			1
(F) As a function of margin thickness and collar height
Group	CLNC	CLLC	CLHC	CHNC	CHLC	CHHC
CLNC	1	1	1	0.377	1	1
CLLC		1	1	0.003	0.110	0.118
CLHC			1	0.006	0.219	0.233
CHNC				1	1	1
CHLC					1	1
CHHC						1