摘要：The purpose of this study was to examine in-vitro whether the conservatively prepared design of restoration of 3-unit fixed partial denture can withstand the masticatory load and whether the test results are comparable to the average maximum load value of natural tooth. Extracted posterior natural tooth were mounted on block of acrylic resin and were conservatively prepared for fixed partial dentures. Fixed partial dentures were made with porcelain and metal (cobalt-chromium alloy) and were cemented with single bond2 (Adhesives) and Rely X ARC (Cement). Each design were then tested under mechanical testing machine (Instron) of 3M Innovation which, exerted the total load of 1000 lbs with speed of 10 inch/min. The printed results in pound force (lbs) of the three designs were then evaluated with the average maximum load of natural tooth, i.e. 170 lbs as the control value. The maximum load that Design A i.e. 291.37 lbs and Design C i.e. 308.65 lbs was comparable to that of the natural tooth i.e. 170 lbs. However, it cannot be conclusively stated that the maximum load that of design B i.e. 564.27 lbs is comparable to that of the natural tooth since the abutments fractured.doi: 10.3860/eacrb.v5i1.514Emilio Aguinaldo College Research Bulletin Vol.5(1) 2006 p.1-13
