Adding silanes to MMA: the effects on the water absorption, adhesive strength and mechanical properties of acrylic denture base resins.
The adhesive strength of porcelain artificial teeth and polymethylmethacrylates (PMMAs), which contained silanes with various number of vinyl or ethoxy groups, and the mechanical and physical properties of the PMMAs were measured. Four types of PMMAs with silanes showed high adhesive shear strength and caused fractures in the porcelain. Water absorption of the PMMAs increased with the addition of silane, but that of one type with silane was almost the same as the PMMA only type. The flexural strengths of the PMMAs with silane, except for one type, showed no significant differences compared with that of PMMA (p < 0.05). The Tg levels of all PMMAs with silane fell less than that of PMMA. From these results, it was found that PMMA with silane from three vinyl groups and one ethoxy group showed excellent chemical bonding to porcelain and low water absorption.
Kanie
T
T
Department of Biomaterials Science, Kagoshima University Dental School, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan.
Fujii
K
K
Arikawa
H
H
Inoue
K
K
D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry*; D000268:Adhesiveness; D000704:Analysis of Variance; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain; D003819:Denture Bases; D004548:Elasticity; D008422:Materials Testing; D018583:Pliability; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D018709:Statistics, Nonparametric; D014093:Tooth, Artificial; D014867:Water / Q000737:chemistry
D000180:Acrylic Resins; D003764:Dental Materials; D012821:Silanes; D014867:Water; D003776:Dental Porcelain; D019904:Polymethyl Methacrylate