Comparison of bond strength of six soft denture liners to denture base resin.
The bond strength of six commercial soft denture liners was evaluated using a modified tensile test. The soft denture liners investigated were Prolastic, VinaSoft, Flexor, Molloplast-B, Novus, and Super-Soft. The samples were processed according to the manufacturers' instructions to cured denture base resin (polymethyl methacrylate; PMMA). The soft denture liners were 10 x 10 x 3 mm and were processed between two PMMA blocks. The samples were placed in tension until failure. The mode of failure, cohesive or adhesive, was also recorded. The results of this study showed that the bond strength is related to the components of the materials. Prolastic, VinaSoft, and Flexor had the lowest bond strength to cured PMMA and ranged from 9.6 to 11.3 kg/cm2. Super-Soft, Novus, and Molloplast-B demonstrated better bond strengths and ranged from 16.7 to 17.6 kg/cm2. The bond strength of Novus could be improved by using the recommended bonding agent and bonded Novus at 26.1 kg/cm2 had the highest bond strength of all materials tested.
Kawano
F
F
Department of Biologic and Materials Science, University of Michigan School of Dentistry, Ann Arbor.
Dootz
E R
ER
Koran
A
A
Craig
R G
RG
D000268:Adhesiveness; D001672:Biocompatible Materials / Q000737:chemistry; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003819:Denture Bases; D003822:Denture Liners; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry*; D012826:Silicone Elastomers / Q000737:chemistry; D013499:Surface Properties; D013718:Tensile Strength; D014753:Vinyl Compounds / Q000737:chemistry
D001672:Biocompatible Materials; D008768:Methylmethacrylates; D012826:Silicone Elastomers; D014753:Vinyl Compounds