An In Vitro Study on the Shear Bond Strength of Feldspathic Porcelain to Nickel Chromium Alloy and Cobalt Chromium Alloy after Various Surface Treatments

Table 5

Intergroup comparison of shear bond strength of Ni-Cr and Co-Cr alloy samples using unpaired t-test.

	Group	N	Mean	Standard deviation	T	df	Sig. (2-tailed)
One	Ni-Cr	10	47.1	1.08	2.671	18	0.016
	Co-Cr	10	45.8	1.18
Two	Ni-Cr	10	52.3	1.43	0.2	18	0.844
	Co-Cr	10	52.2	1.80
Three	Ni-Cr	10	65.6	1.49	0.831	18	0.417
	Co-Cr	10	65.0	1.54
Four	Ni-Cr	10	56.5	0.71	1.031	18	0.316
	Co-Cr	10	56.2	0.83

, significant; , highly significant; , very highly significant; , not significant.