The adhesive ability of “One Coat Bond” used in bonded amalgam restoration:A SEM study / 实用口腔医学杂志

ABSTRACT

Objective:To observe the effect of “One Coat Bond” on the interface between amalgam restoration and cavity wall used in bonded amalgam restoration(BAR).Methods:Dentin cavities were made on 15 healthy human premolars extracted for orthodontics therapy.The teeth were divided into 3 groups with 5 in each group.In group A compressive air was used to dry the cavities(dry adhesion) whereas in group B absorbent cotton was used (wet adhesion). Then the cavity walls in the two groups were treated with the “One Coat Bond”, the cavities were filled with freshly prepared amalgam before adhesive concrete.In group C cavities were filled directly with amalgam without treatment of cavity walls. Morphology of amalgam restoration/“One Coat Bond” adhesive/dentin cavity wall interface was observed under SEM, thickness of adhesive and width of space between amalgam restoration and cavity wall was measured. Results:Average width(?m) of space between restoration and cavity wall was 4.82 in group A, 0 in group B and 11.33 in group C(P0.05).Conclusion:“One Coat Bond” adhesive can significantly improve the compactness between amalgam and cavity wall.