From: Effect of thermocycling on acetal resin versus PEEK surface hardness and flexure strength of implant-retained overdenture bars: in vitro study
Thermocycling
PEEK
Acetal resin
Difference
M
SD
MD
SEM
95% CI
P value
L
U
Before
90.41
5.3
87.3
4.1
3.11
2.730
−2.980
9.2
0.280
After
86.45
4.5
74.2
3.5
12.25
2.320
7.060
17.43
0.004*
0.28
0.002*