Bonding mechanism of Ketac-Molar Aplicap and Fuji IX GP to enamel and dentin.
OBJECTIVE
To evaluate the bonding mechanism to enamel and dentin of two chemically-cured restorative glass ionomer cements (GICs).


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.
Hosoya
Y
Y
Department of Pediatric Dentistry, Nagasaki University School of Dentistry, Japan.
García-Godoy
F
F
D000134:Acid Etching, Dental; D001641:Bicuspid; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage; D018772:Dental Marginal Adaptation; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning
D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; C110713:fuji IX; C110712:ketac-molar