Bonding of Plastic Teeth to Heat-Cured Denture Base Resins

Effect of Microwave Treatment on the Shear Bond Strength of Denture Tooth/Acrylic Resin

“…Physical modification by retention grooves of different shapes on the ridge lap surface of the tooth had no significant effect on the bond strength [26,33], and grinding of this surface may only be beneficial to bonding in the absence of wax traces [23]. It is claimed that the use of modern synthetic detergents that effectively remove all traces of wax is necessary for preventing such failures [21]. Detergent solution was used in the current study to remove the traces of wax from the teeth.…”

“…Conversely, a poor laboratory technique that impedes the formation of a satisfactory bond between tooth and resin base can also be responsible for many failures [20]. Previous studies have shown that imperceptible traces of wax on the ridge lap of the tooth seem to be the principal contaminant and have a highly significant detrimental effect on the bond, causing adhesive failure [21][22][23]. On the other hand, changes in the surface of the glossy ridge lap surface by grooving or abrasion do not make a significant difference when compared with unmodified surfaces [24], while a significant increase in bond strength was obtained when suitable bonding agents were applied [25].…”

Achieving a good bond in acrylic resin denture teeth

“…[30][31][32][33][34][35] Wax elimination and ensuring that teeth are uncontaminated and free of any debris has been found to be more likely to achieve adequate bonding strength than any mechanical preparation, which could be applied to the ridgelap surfaces of the teeth. Wax contamination of the tooth ridgelap surface has been found to be a cause of significantly reduced bond strength.…”

Effect of aluminium oxide particle sandblasting on the artificial tooth–resin bond

“…Acrylic resin teeth are widely utilized in prostheses processing because of their ability to bond chemically to the denture‐base resin due to the chemical similarity of both materials 1,2 . However, some studies have shown that the complete prostheses are occasionally repaired due to artificial tooth fracture or failure of the artificial tooth–resin bond, 2–5 requiring a new bonding procedure or replacement of the artificial tooth.…”

“…Poor laboratory technique can also prevent perfect bond of the artificial tooth to denture‐base resin, causing subsequent failure. Thus, the artificial tooth ridge‐lap surface contaminated by wax residues can produce significantly weaker bonds 1,3,5–7 . Besides wax contamination, the degree of a cross‐linking monomer added to the artificial tooth and the monomer amount available on the denture‐base resin during processing might affect the artificial tooth–resin bond strength 8 …”