Abstract
Because the retainers of an adhesion bridge are adhered to the lingual and a part of the proximal tooth surface with an adhesive resin, metal for the retainer necessiates the mechanical properties which are endurable of occlusal force even if it is thin. It is suspected that an adhesion bridge made of type IV gold alloy, which has been used conventionally for crowns and bridges, results in the insufficient longevity of placement because of the shortage of its toughness.In this study we examined the mechanical properties and adhesive strength of the trial gold alloy we developed recently, whose hardness is higher than type IV gold alloy. Panavia EX® was used as an adhesive resin.We obtained the result that the trial gold alloy has greater properties in elastic modulus, proof stress and fatigue strength than type IV gold alloy and other dental gold alloys.Therefore, it is expected that the trial gold alloy has excellent rigidity as retainer metal for an adhesion bridge even if it is thin.
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