The Influence of the Thickness of Wing Portions of an Anterior Acid-etched Fixed Partial Denture on the Bond Strength to Abutment Teeth
1986 Volume 30 Issue 1 Pages 27-31
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1986 Volume 30 Issue 1 Pages 27-31
A number of reports on the acid-etched fixed partial dentures have been made. How to prevent the falling of retainers from the abutment teeth has been one of the unresolved problem. H. miyairi et al. suggested that the adhesive strength between retainers and acid-etched abutment teeth might been significantly influenced by the rigidity of the metal framework.
The purpose of this study is to evaluate the influence of retainer's thickness on the adhesive strength of acid-etched fixed partial denture. The wax frameworks of various thickness were cast in cobalt-chromium alloy and Au-Ag-Pd alloy respectively.
The following conclusions were obtained.
1) The adhesive strength between the retainer and the bovine tooth increased according as the retainer's thickness increased, and reached the maximum and plateau with the thickness of 1.5mm.
2) In case of using Super-Bond C & B, the adhesive strength of Au-Ag-Pd alloy to the teeth was better than that of Co-Cr alloy with the thickness of less than 1.2mm.
