Bonding strength of autopolymerizing resin to nylon denture base polymer

Abstract

This study aimed to investigate the shear bond strength of an autopolymerizing resin to a nylon denture base polymer (Lucitone FRS: LT) subjected to different surface treatments, and the results thereof compared with a heat-polymerizing resin and a polycarbonate polymer. Specimens were divided into five groups according to the surface treatment method: polishing (#600), sandblasting, adhesive primer application (resin primer), sandblasting + adhesive primer application, and tribochemical coating (Rocatec system). Following which, specimens were subjected to a shear bond strength test and Si concentrations were measured using an electron probe microanalyzer (EPMA). On shear bond strength, that of LT with tribochemical coating was significantly higher than the other groups. On EPMA results, the surface of LT with tribochemical coating was found to be covered with a silica film. Therefore, findings in this study indicated that silica-coating by Rocatec system was effective in improving the bond strength of nylon denture base polymer to autopolymerizing repair resin.

Flexural properties of ethyl or methyl methacrylate-UDMA blend polymers

“…This technique is effective to improve the mechanical properties; however it is very difficult to incorporate accurately reinforcing materials in the desired position of the denture base resin. Another approach is to apply other polymer materials [3][4][5] such as polycarbonate or nylon, to disperse a rubbery material 10) , such as butadiene, or to add a cross-linking agent [18][19][20] , such as dimethacrylate. However, the flexural modulus and the flexural strength of nylon denture base resin were lower than those of acrylic denture base resins.…”

“…There are several attempts [3][4][5][6][7][8][9][10][11][12][13][14][15][16] to increase the mechanical properties of denture base resins. One approach is to devise a reinforcement of denture base polymer with fibers, chips, or rods [12][13][14][15][16] .…”

“…Intraoral repeated masticatory forces lead to fatigue fracture, while extraorally impact fracture may occur as a result of dropping the denture onto the hard surface. Many attempts to improve the mechanical properties of polymethyl methacrylate (PMMA) have included using alternate polymers such as polycarbonate 3) , nylon 4,5) , copolymers 6,7) and urethane dimethacrylate (UDMA) 8,9) , and incorporating of butadiene-styrene rubber into PMMA matrix 10,11) . As another attempt, various fiber or chip materials [12][13][14][15][16] such as carbon, aramid and glass have been added into PMMA resin for reinforcing materials, and metal wires and meshes have ordinary been used for reinforcing materials to prevent the midline fracture of denture.…”

Effect of ultraviolet light irradiation and sandblasting treatment on bond strengths between polyamide and chemical-cured resin

“…Therefore, the bonding efficiency of polyamide using chemical-cured resin may not be uniform. Several surface treatments have been suggested to improve the bonding efficiencies, such as 1) surface treatments that increase the roughness using sandblasting with Al 2O3 particles 6,7) ; 2) swelling and roughening the surface with organic solvent containing dichloromethane or ethyl acetate 6,9) ; and 3) chemical improvement of the surface by ultraviolet light (UV) irradiation. The former two treatments mainly increase surface roughness and mechanical interlocking, while the latter cleans and chemically modifies the surface.…”

“…These polymers are thermoplastic resins; however, their bonding efficiency to a chemical-cured resin is usually poor. In particular, the bonding of polyamide using the chemical-cured resin was reported to be very difficult [5][6][7] . There are various types of polyamides with different molecule structures 3,8) , and they are difficult to dissolve in organic solvents.…”