Water sorption and solubility of polyamide denture base materials

Figures & data

Table 1. Materials used in this study.

Material name	Chemical component^a	Manufacturer	Address
Breflex (nylon)	PA 12 (polyamide)	Bredent GmbH & Co. KG	Bredent medical GmbH & Co. KG Weißenhorner Straße 2 89250 Senden (Germany)
Valplast (nylon)	MSDS: no declaration	Valplast International Cor	Valplast International Corp 200 Shames Drive Westbury, NY 11590, USA
SR Ivocap (HIP) (PMMA)	Heat-polymerized PMMA	Ivoclar Vivadent AG	Bendererstrasse 2 9494 Schaan Principality of Liechtenstein

^a As given in MSDS, IFU or other product information.

Figure 1. Mean values of water sorption and solubility of the tested materials in μg/mm³. Whiskers represent the standard deviation. There were statistically significant differences among all groups for both sorption and solubility (p < .05).

Figure 2. The mean difference in weight over time of specimen discs measured in g. The specimens were inserted in water after reaching a constant mass at m₁ and removed from water at m₂ (constant mass wet specimens). The reconditioned mass was determined as m₃.

Figure 3. The mean Vickers hardness over time in water immersion, expressed as HV0.5.