[Influence of multiple coats of bonding agent on the bond strength of amalgam bonding].
OBJECTIVE
To evaluate the effect of multiple coats of bond on the bond strength of amalgam bonding.


METHODS
One or two layers of Scotch-bond multi-purpose plus dental adhesive agent were applied on the dental walls of two groups of teeth respectively prior to amalgam condensation. The third group was set for control which only had amalgam filling. After one week, thermocycling, shear bond strength were tested for all specimens with 1195-Instron testing machine. Data were analyzed by SPSS 8.0. The SEM observation were made in other five modals with one or two layers bonding.


RESULTS
The shear strengths of two or one layer bond and control one were 25.77, 20.69 and 13.05 MPa separately. The difference among them was statistical significant (P < 0.01).


CONCLUSIONS
The microlocking was more obvious in specimens of two bonding layers.
Zhao
L
L
Department of Oral Medicine, College of Stomatology, Tiedao Medical University, Shanghai 200072, China.
Fu
H
H
Xu
X
X
D001696:Biomechanical Phenomena; D003722:Dental Alloys / Q000737:chemistry; D003723:Dental Amalgam / Q000737:chemistry; D001840:Dental Bonding; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning
C070606:Amalgambond; D003722:Dental Alloys; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D003723:Dental Amalgam