The effect of sprue design and alloy type on the fit of three-unit metal/ceramic bridges.
This study was designed to compare the effect of three sprue designs and three types of metal alloy/ceramic on the accuracy of fit of three unit bridges. A sprue design which has straight sprues attached directly to the pattern but does not have a button of excess metal connecting the sprues together after casting, produced the best marginal accuracy, irrespective of the alloy type used. Of the three alloys used (gold, palladium and nickel/chromium based alloys) the gold alloy produced better fitting bridges with each sprue design used.
Johnson
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Department of Restorative Dentistry, School of Clinical Dentistry, University of Sheffield, UK.
D000704:Analysis of Variance; D002858:Chromium Alloys; D003735:Dental Casting Technique; D018772:Dental Marginal Adaptation; D003779:Denture Design; D003830:Denture, Partial, Fixed; D006047:Gold Alloys; D006801:Humans; D016876:Metal Ceramic Alloys; D010165:Palladium; D017755:Prosthesis Fitting
D002858:Chromium Alloys; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D010165:Palladium