. Author manuscript; available in PMC: 2010 Sep 1.

Published in final edited form as: Dent Mater. 2009 Apr 18;25(9):1116–1121. doi: 10.1016/j.dental.2009.03.008

Table 1.

Microtensile peak stress (MPa) with standard deviation of the different test groups. Numbers of specific failure types are represented in percents.

Group	Peak Stress (SD) (MPa)	Adhesive (%)	Mixed (%)	Cohesive (%)
Composite (bars only)^a	29.2 (3.7)	control
Porcelain^b – (control)	25.3 (5.3)	16	35	49
Zirconia (Si_xO_y - 2.6nm thickness)^b	23.2 (5.4)	15	40	45
Zirconia (Co-Jet™ treatment)^c	18.6 (5.9)	32	52	16
Zirconia (Si_xO_y - 23nm thickness)^c	16.2 (5.9)	50	43	7
Zirconia (no treatment)^d	7.6 (3.0)	72	28	-