Bulletin of the National Research Centre

Table 2 Mean and standard deviation of before and after in both groups and comparison between both groups (effect of material)

From: Effect of thermocycling on acetal resin versus PEEK surface hardness and flexure strength of implant-retained overdenture bars: in vitro study

	PEEK		Acetal		P value
	M	SD	M	SD	P value
Before	26.30	0.14	23.63	0.93	0.0001*
After	24.50	0.20	21.03	0.21	0.0001*

M: means, *Significant difference as P < 0.05

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