Mechanical properties of a resin-modified glass ionomer cement for luting: effect of adding spherical silica filler.
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.
E
Lihua
L
Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Science, Kita-ku, Okayama, Japan.
Irie
Masao
M
Nagaoka
Noriyuki
N
Yamashiro
Takashi
T
Suzuki
Kazuomi
K
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
D005899:Glass Ionomer Cements; D019279:Resin Cements; C400934:fuji-lute; D012822:Silicon Dioxide