title: Micromorphological characterization of adhesive interface of sound dentin and total-etch and self-etch adhesives.
abstract: BACKGROUND
  The ultimate goal in restorative dentistry has always been to achieve strong and permanent bond between the dental tissues and filling materials. It is not easy to achieve this task because the bonding process is different for enamel and dentin-dentin is more humid and more organic than enamel. It is moisture and organic nature of dentin that make this hard tissue very complex to achieve adhesive bond. One of the first and most widely used tools for examining the adhesive bond between hard dental tissues and composite restorative materials is scanning electron microscopy. The aim of this study was scanning electron microscopy analyzes the interfacial micro morphology of total-etch and self-etch adhesives.
  
  
  METHODS
  Micro morphological characteristics of interface between total-etch adhesive (Prime & Bond NT) in combination with the corresponding composite (Ceram X Mono) were compared with those of self-etching adhesive (AdheSE One) in, combination with the corresponding composite (Tetric EvoCeram). The specimens were observed under 1000 x magnification of scanning electron microscopy (JEOL, JSM-6460 Low Vacuum). Measurement of the thickness of the hybrid layer of the examined com posite systems was performed with the software of the device used (NIH Image Analyser).
  
  
  RESULTS
  Micromorphological analysis of interface showed that the hybrid layer in sound dentin was well formed, its average thickness being 2.68 microm, with a large number of resin tags and a large amount of lateral branches for specimens with a composite system Prime & Bond NT-Ceram X Mono. However, the specimens' with composite systems Adhese One-Tetric EvoCeram did not show the presence of hybrid layer and the resin tags were poorly represented.
  
  
  CONCLUSIONS
  The results of this study suggest that total-etch adhesives bond better with sound dentin than self-etch adhesive.
authors.forename: Milan
authors.initials: M
authors.lastname: Drobac
authors.forename: Igor
authors.initials: I
authors.lastname: Stojanac
authors.forename: Bojana
authors.initials: B
authors.lastname: Ramić
authors.forename: Milica
authors.initials: M
authors.lastname: Premović
authors.forename: Ljubomir
authors.initials: L
authors.lastname: Petrović
mesh_terms: D000134:Acid Etching, Dental; D000180:Acrylic Resins; D003188:Composite Resins; D001840:Dental Bonding; D003738:Dental Cements; D045662:Dental Etching; D003799:Dental Stress Analysis; D003804:Dentin; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011109:Polymethacrylic Acids
chemical_list: D000180:Acrylic Resins; C489662:AdheSE cement; D003188:Composite Resins; D003738:Dental Cements; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT