. Author manuscript; available in PMC: 2015 May 1.

Published in final edited form as: Dent Mater. 2014 Mar 29;30(5):e112–e123. doi: 10.1016/j.dental.2014.02.014

Table 1.

Edge chip results for the feldspathic porcelain.^a

Material	Indenter^b	Distance range (mm)	N	Edge toughness T_e, slope of linear Eq. (1) (N/mm)	Power law Eq. (2)
Feldspathic porcelain small bend bars	90° SC	0–0.50	25	89 (6)	F = 114 d^1.25
	100° SC	0–0.50	25	116 (8)	F = 214 d^1.67
	120° SC	0–0.50	26	138 (5)	F = 168 d^1.20
	140° SC	0–0.50	25	223 (14)	F = 279 d^1.23
Feldspathic porcelain Large blocks	120° SC	0–0.60	35	164 (10)	F = 238 d^1.46
	Rockwell C	0–0.60	27	327 (25)	F = 284 d^0.80
	Vickers	0–0.60	31	224 (12)	F = 370 d^1.55

Uncertainties are ± one standard deviation.

SC denotes sharp conical.