Panpisut Piyaphong, Monmaturapoj Naruporn, Srion Autcharaporn, Toneluck Arnit, Phantumvanit Prathip
Faculty of Dentistry, Thammasat University, Pathum Thani, Thailand.
Assistive Technology and Medical Devices Research Center(A-MED),National Science and Technology Development Agency, Pathum Thani, Thailand.
Braz Dent J. 2020 Sep 4;31(4):445-452. doi: 10.1590/0103-6440202003276.
The aim of this study was to assess the effect of different commercial liquid phases (Ketac, Riva, and Fuji IX) and the use of spherical pre-reacted glass (SPG) fillers on cement maturation, fluoride release, compressive (CS) and biaxial flexural strength (BFS) of experimental glass ionomer cements (GICs). The experimental GICs (Ketac_M, Riva_M, FujiIX_M) were prepared by mixing SPG fillers with commercial liquid phases using the powder to liquid mass ratio of 2.5:1. FTIR-ATR was used to assess the maturation of GICs. Diffusion coefficient of fluoride (DF) and cumulative fluoride release (CF) in deionized water was determined using the fluoride ion specific electrode (n=3). CS and BFS at 24 h were also tested (n=6). Commercial GICs were used as comparisons. Riva and Riva_M exhibited rapid polyacrylate salt formation. The highest DF and CF were observed with Riva_M (1.65x10-9 cm2/s) and Riva (77 ppm) respectively. Using SPG fillers enhanced DF of GICs on average from ~2.5x10-9 cm2/s to ~3.0x10-9 cm2/s but reduced CF of the materials on average from ~51 ppm to ~42 ppm. The CS and BFS of Ketac_M (144 and 22 MPa) and Fuji IX_M (123 and 30 MPa) were comparable to commercial materials. Using SPG with Riva significantly reduced CS and BFS from 123 MPa to 55 MPa and 42 MPa to 28 MPa respectively. The use of SPG fillers enhanced DF but reduced CF of GICs. Using SPG with Ketac or Fuji IX liquids provided comparable strength to the commercial materials.
本研究的目的是评估不同商用液相（Ketac、Riva和Fuji IX）以及使用球形预反应玻璃（SPG）填料对实验性玻璃离子水门汀（GIC）的水泥成熟度、氟释放、抗压强度（CS）和双轴弯曲强度（BFS）的影响。实验性GIC（Ketac_M、Riva_M、FujiIX_M）通过将SPG填料与商用液相按2.5:1的粉液质量比混合制备而成。采用傅里叶变换红外光谱衰减全反射法（FTIR-ATR）评估GIC的成熟度。使用氟离子特异性电极测定去离子水中氟的扩散系数（DF）和累积氟释放量（CF）（n = 3）。还测试了24小时时的CS和BFS（n = 6）。使用商用GIC作为对照。Riva和Riva_M表现出快速形成聚丙烯酸盐。Riva_M（1.65×10-9 cm2/s）和Riva（77 ppm）的DF和CF分别最高。使用SPG填料使GIC的DF平均从约2.5×10-9 cm2/s提高到约3.0×10-9 cm2/s，但使材料的CF平均从约51 ppm降低到约42 ppm。Ketac_M（144和22 MPa）和Fuji IX_M（123和30 MPa）的CS和BFS与商用材料相当。将SPG与Riva一起使用可使CS和BFS分别从123 MPa显著降低至55 MPa和从42 MPa降低至28 MPa。使用SPG填料可提高GIC的DF，但降低CF。将SPG与Ketac或Fuji IX液体一起使用可提供与商用材料相当的强度。
