The Analysis Of Different Connective Area Design In All-Ceramic FPD

Objective: to analize the different connective area design in all-ceramic FPD .Methods: Divide 80 standard model into 4 groups, and carve wax pattern with different curvature radius.Each group has 10 models made in IPS-Empress and 10 made in In — ceram Alumina.Analysis its maximum fracture resistance in 3- dimensional finite elemental analysis software. Results:The 0.9mm curvature radius of gingival embrasure has larger fracture resistance than 0. 3mm, while the occlusal embrasure has little effect on fracture resistance. And the PFDs made with In —ceram Alumina has larger fracture resistance than those made of IPS-Empress. Conclusion: 1 The Fintine Element Method is a simple and convenient way in oral biomechanical analysis.2 The curvature can affect the all-ceramic FPD fracture resistance,the sharper curvature connector has larger resistance than wider curvature connector3 To made posterior all-ceramic FPD, it' s better to use In —ceram Alumina,...