Influence of Various Chemical Surface Treatments, Repair Materials, and Techniques on Transverse Strength of Thermoplastic Nylon Denture Base

Table 1

Materials used in this study.

Material	Brand name	Manufacturer	Batch number	Application	Processing method
Polyamide resin (Nylon 12)	Valplast™	Valplast International Corp., NY, USA	QTY: 10	Denture base material	Injection moulding technique; heating to 288°C under pressure of 0.1 MPa. The screwed flask was placed in hot oven at 75°C for 12 min
Heat-polymerized PMMA acrylic resin	Vertex™ Rapid simplified	Vertex, Netherlands	XX131P11	Repair material	Heat processed with a 500 W for 3 min
Autopolymerized PMMA acrylic resin	Vertex™ Castapress	Vertex, Netherlands	XY441P01	Repair material	Dough material cure at 45°C for 15 min under pressure of 2 bars
Light-polymerized acrylic resin	Unifast LC	GC Corp., Japan	Powder: 0712033; Liquid: 0712122	Repair material	The curing cycle was 470 N wave length for 10 min
Methyl methacrylate monomer	Vertex™ Rapid simplified	Vertex, Netherlands	XX131P11	Surface treatment material	Butt joint surface swabbed with monomer for 60 s
Acetone (CH3)2CO	Acetone	MW:58.08, UK	09200	Surface treatment material	Butt joint surface swabbed with acetone for 30 s
Ethyl acetate (CH3COOC2H5)	Ethyl acetate	MW:88.11, UK	09706	Surface treatment material	Butt joint surface swabbed with ethyl acetate for 120 s
Isopropanol (C3H8O)	Isopropanol	MW:60.10, UK	09200	Surface treatment material	Butt joint surface swabbed with isopropanol for 5 s

PMMA: poly(methyl methacrylate).