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

Table 1

Mean, standard deviation (sd), 95% confidential interval (CI), characteristic strength (σ_o) of fracture strength (Newton, N), Weibull modulus (m), and duration of fracture (second, s) of high translucency monolithic zirconia 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).

Group	Fracture load (N)				m	Duration of fracture (s)
	Mean ± sd	95% CI		σ O		Mean ± sd	95% CI
		LB	UB				LB	UB
CLNC	3211 ± 778	2780	3641	3,508.73	4.61	212 ± 47	186	238
CLLC	3041 ± 1370	2282	3800	3,473.30	2.28	188 ± 53	159	218
CLHC	2913 ± 828	2454	3371	3,231.11	3.83	192 ± 27	177	207
CHNC	4226 ± 905	3724	4727	4,613.57	5.04	245 ± 35	225	264
CHLC	4486 ± 807	4039	4933	4,830.64	5.93	228 ± 29	211	244
CHHC	4376 ± 1043	3798	4953	4,801.51	4.40	227 ± 37	207	248

LB = lower bound; UB = upper bound.