In vivo bonding mechanism of an experimental dual-cure enamel-dentin bonding system.
OBJECTIVE
To evaluate, in vivo, the formation of hybrid layer, resin tags and adhesive lateral branches, by an experimental dual-curing "one-bottle" enamel-dentin bonding system.


METHODS
The new dentin adhesive (Excite DSC) was tested in five Class V restorations placed in vital, periodontally compromised teeth. The experimental bonding system was used in combination with a flowable composite. After 1 wk the teeth were extracted and processed for SEM evaluation. All the samples were split-fractured along their long axis. Half of the samples were used to evaluate hybrid layer formation and the other half to examine the morphology of resin tags.


RESULTS
The experimental adhesive system showed a micromechanical bonding mechanism to conditioned dentin with formation of a hybrid layer, resin tags and adhesive lateral branches. SEM photomicrographs of the decalcified samples showed a high density of resin tags and uniform distribution along the cavity walls.
Dagostin
A
A
Department of Dental Materials, University of Siena, Italy.
Ferrari
M
M
D003188:Composite Resins; D001840:Dental Bonding; D003793:Dental Restoration, Permanent / Q000379:methods; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D006801:Humans; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning
D003188:Composite Resins; D017220:Dentin-Bonding Agents; C420130:Excite cement; D008689:Methacrylates; C111840:flowable hybrid composite