Table 2.
The Analysis of variance resume of the leachant (L), water absorption (WA), anti-swelling efficiency (ASE), tangential-radial shrinkage ratio (T/R), color change (DE*), weight loss of decay test in laboratory (WLL) and field (WLF) scales.

	Statistical Values	L	WA	T/R	ΔE*	WLL	WLF
B	F (P-value)	152.76 (0)**	73.47 (0)**	4.144 (0,022)*	2.591 (0,085)ns	5.17 (0,009)**	38.849 (0)**
MMA	F (P-value)	59.935 (0)**	4562.387 (0)**	0.063 (0.802)ns	487.252 (0)**	0.001 (0.977)ns	467.826 (0)**
H	F (P-value)	0.358 (0.552)ns	321.505 (0)**	0.779 (0.382)ns	280.316 (0)**	94.412 (0)**	6.85 (0.012)*
B×MMA	F (P-value)	4.588 (0.015)*	23.755 (0)**	1.395 (0.258)ns	2.751 (0.074)ns	1.008 (0.373)ns	2.714 (0.076)ns
B×H	F (P-value)	20.783 (0)**	71.395 (0)**	1.435 (0.248)ns	3.263 (0.047)*	0.272 (0.763)ns	1.518 (0.229)
MMA×H	F (P-value)	6.454 (0.014)*	68.171 (0)**	0.261 (0.612)ns	176.963 (0)**	17.806 (0)**	0.622 (0.434)ns
B×MMA×H	F (P-value)	3.568 (0.036)*	140.401 (0)**	0.546 (0.583)ns	3.361 (0.043)*	0.025 (0.975)ns	0.527 (0.594)ns

Notes: B, MMA and H indicated boron preservatives, methyl methacrylate, and heat treatments.
significant effect (P<0.05)
very significant effect (P<0.01)
not significant effect.