![]() ![]() 6 RMGIC adhesives bond to the tooth structure via the traditional conditioning for RMGIC restorative materials, namely conditioning the dentine with polyacrylic acid (PAA) then washing and drying. 4, 5 In 1995, a new category of adhesives was introduced named as ‘RMGIC adhesive’. 4 This characteristic feature can differentiate RMGIC from the polyacid-modified resin composite materials (e.g. 3 RMGICs can completely set in total darkness without exposure to a curing light within 24 h. 1, 2 The typical RMGIC consists of approximately 80% GIC components (fluoroaluminosilicate glass and polyacrylic acid), while the remaining 20% consists of light cured methacrylates. In 1988, resin-modified glass ionomer cements (RMGIC) were introduced to overcome the drawbacks of conventional GICs and provide a material that would bond to tooth structure via both chemical and micromechanical adhesive mechanisms. Glass ionomer cements (GIC) have been greatly developed in the last two decades. environmental field-emission scanning electron microscopy.Conclusionsįor RMGIC adhesives a brief etch with phosphoric acid does not adversely effect short-term bond strengths, but is no better than traditional conditioning with PAA. The microtensile bond strength of Ketac N100 primer groups was lower than Fuji Bond LC and Riva Bond LC (p < 0.05). Two-way analysis of variance (ANOVA) revealed adhesion was affected by the ‘type of RMGIC adhesive’ and ‘method of dentine surface treatment’ (p < 0.05). Teeth were finished with 600-grit SiC paper, surfaces treated and bonded with RMGIC adhesive and stored in distilled water for 24 h then subjected to microtensile bond strength testing. Surface treatments were 37% phosphoric acid (5 s) or 25–30% polyacrylic acid (PAA) (10 s), or the manufacturer's method – Fuji Bond LC: Cavity Conditioner (20% PAA + 3% AlCl 3 10 s) or Ketac N100 primer: Ketac Nano priming agent (15 s). Three RMGIC adhesives were evaluated: Fuji Bond LC (GC Corp) Riva Bond LC (SDI Ltd) and Ketac N100 (3M-ESPE). Methodsįorty human molars were utilized in microtensile bond strength testing, while another 16 were used for evaluation of the bonded interface with scanning electron microscopy. The aim of this study was to investigate the use of phosphoric acid as a surface treatment compared to traditional conditioning agents to dentine bonded with resin-modified glass ionomer (RMGIC) adhesives. ![]()
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