Research Article

Physical Properties of Polyamide-12 versus PMMA Denture Base Material

Table 3

Mean surface roughness Ra ( m) of polyamide-12 and PMMA after delivery from the dental laboratory, after storage in water, coffee, red wine (36 days), and thermocycling ( ). Significant differences were found neither within the polyamide-12 and PMMA groups nor between polyamide-12 and PMMA.

ProcedureMaterialMean Ra (µm)SEMinMax

After deliveryPolyamide-120.280.050.070.42
PMMA0.200.020.130.33

WaterPolyamide-120.210.050.070.49
PMMA0.240.030.150.48

CoffeePolyamide-120.330.070.090.76
PMMA0.260.030.140.44

Red winePolyamide-120.200.050.090.52
PMMA0.280.040.120.54

5000 thermocyclesPolyamide-120.290.070.070.66
PMMA0.240.020.160.33