Y Hosoya1, F García-Godoy. 1. Department of Pediatric Dentistry, Nagasaki University School of Dentistry, Japan.
Abstract
PURPOSE: To evaluate the bonding mechanism to enamel and dentin of two chemically-cured restorative glass ionomer cements (GICs). MATERIALS AND METHODS: Buccal surfaces of six caries-free premolars stored in a 1% chloramine solution were ground and then polished with 600 grit SiC paper to expose both enamel and dentin. Ketac-Molar Aplicap (after conditioned with Ketac-Conditioner) or Fuji IX GP (after conditioned with Cavity Conditioner) was applied on the enamel and dentin according to the manufacturers' instructions. Ketac-Molar Aplicap was coated with Ketac-Glaze and Fuji IX GP with GC Fuji Varnish. After 24-hr immersion in water, all teeth were sectioned bucco-lingually in the center of the bonded surface. Bonded interfaces of one of the halves of the sectioned specimens were etched with 35% phosphoric acid gel for 10 s and then soaked in 5% sodium hypochlorite solution for 5 min. All specimens were dehydrated with ethyl alcohol and dried with HMDS. Bonding interfaces were coated with gold-palladium and observed under the SEM. RESULTS: For both Ketac-Molar Aplicap and Fuji IX GP, an intimate adaptation between the material and the enamel was observed. Both materials bonded to dentin without gap formation. For both Ketac-Molar Aplicap and Fuji IX GP, neither resin tags nor hybrid layer was observed in any specimen.
PURPOSE: To evaluate the bonding mechanism to enamel and dentin of two chemically-cured restorative glass ionomer cements (GICs). MATERIALS AND METHODS: Buccal surfaces of six caries-free premolars stored in a 1% chloramine solution were ground and then polished with 600 grit SiC paper to expose both enamel and dentin. Ketac-Molar Aplicap (after conditioned with Ketac-Conditioner) or Fuji IX GP (after conditioned with Cavity Conditioner) was applied on the enamel and dentin according to the manufacturers' instructions. Ketac-Molar Aplicap was coated with Ketac-Glaze and Fuji IX GP with GC Fuji Varnish. After 24-hr immersion in water, all teeth were sectioned bucco-lingually in the center of the bonded surface. Bonded interfaces of one of the halves of the sectioned specimens were etched with 35% phosphoric acid gel for 10 s and then soaked in 5% sodium hypochlorite solution for 5 min. All specimens were dehydrated with ethyl alcohol and dried with HMDS. Bonding interfaces were coated with gold-palladium and observed under the SEM. RESULTS: For both Ketac-Molar Aplicap and Fuji IX GP, an intimate adaptation between the material and the enamel was observed. Both materials bonded to dentin without gap formation. For both Ketac-Molar Aplicap and Fuji IX GP, neither resin tags nor hybrid layer was observed in any specimen.
Authors: Beata Czarnecka; Patricia Deregowska-Nosowicz; Honorata Limanowska-Shaw; John W Nicholson Journal: J Mater Sci Mater Med Date: 2007-01-04 Impact factor: 4.727
Authors: Linda Wang; Daniela Francisca Gigo Cefaly; Janaína Lima Dos Santos; Jean Rodrigo Dos Santos; José Roberto Pereira Lauris; Rafael Francisco Lia Mondelli; Maria Teresa Atta Journal: J Appl Oral Sci Date: 2009 Jul-Aug Impact factor: 2.698