title: Mechanical properties of a resin-modified glass ionomer cement for luting: effect of adding spherical silica filler.
abstract: This study investigated the effects of spherical silica filler (SSF) on the workability and mechanical properties of resin-modified glass ionomer cements for luting (RMGICL). Varying powder/liquid ratios (P/L=2.0, 2.2, 2.4, and 2.6) of a commercially available glass ionomer cement (Fuji Lute, GC Corp.) were mixed with SSF at different weight percentages (5, 7.5, and 10%). On film thickness, statistically significant effects of SSF addition were noted at 2.5 minutes after mixing started, notably at P/L=2.4 and 2.6 when 7.5 and 10 wt% of SSF were added. The same result was also obtained for consistency evaluation. On mechanical and bonding strengths to the tooth substrate, no statistically significant differences were observed among all the SSF weight percentages within each P/L ratio. SSF-added RMGICL at a higher powder/liquid ratio exhibited increased mechanical and bonding strengths when compared to a control without SSF addition, but nonetheless maintained the film thickness with no further increase.
authors.affiliation: Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Kita-ku, Okayama, Japan.
authors.forename: Lihua
authors.initials: L
authors.lastname: E
authors.forename: Masao
authors.initials: M
authors.lastname: Irie
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Nagaoka
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamashiro
authors.forename: Kazuomi
authors.initials: K
authors.lastname: Suzuki
mesh_terms: D019245:Compressive Strength; D001840:Dental Bonding; D003799:Dental Stress Analysis; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D055595:Mechanical Phenomena; D010316:Particle Size; D018583:Pliability; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D012822:Silicon Dioxide; D013499:Surface Properties
chemical_list: D005899:Glass Ionomer Cements; D019279:Resin Cements; C400934:fuji-lute; D012822:Silicon Dioxide