Experimental Study Of The Bonding Strength Of Dental Porcelain Fused To Pure Ti And Ti Alloy

Objective: By the shear bond strength testing, evaluate the pure titanium and titanium alloy fused to ceramic, and provide theoretical and experimental basis for clinical treatment.Materials and methods: Titanium and Titanium alloy rods were sliced into 5mm width by using a diamond saw, whose diameter is 6mm. The specimens were divided into 4 groups, 10 each group, The specimens were blasted and washed, fused 2mm width ceramic layer. By utilizing a self- made clamp, all specimens were placed on a fatigue testing machine, loaded on metal-ceramic surface, and the shear bond strength was recorded. The data of 4 groups was analysd by ANOVA. Use EMPA to observe the interface. Compare the elemental composition of interface about 4 groups. Use stereomicroscope to observe the fracture surface, and evaluated the failure type.Results: The shear bond strength testing of 4 groups: Group Aa(26.35±3.61)MPa, Group Ab(28.93±5.06)MPa, Group Ba(31.84±7.09)MPa, Group Bb(33.7947±3.85342)MPa. Use ANOVA and SNK test for statistic, there are significant differences between Group Aa and Ba, Group Aa and Bb, Group Ab and Bb(P<0.05). There are no significant differences between the rest Groups (P>0.05). Observed with EMPA, metal and ceramic were closely contact, no significant fracture. The element composition in metal-ceramic interface of 4 groups was similar. Use stereomicroscope to observe the fracture surface, the failure type of all groups was on bonder ceramic layer, there is residual bonder on fracture surface in all groups.Conclusion: Titanium and Titanium alloy have good combination with ceramic, whose shear bond strength satisfied clinical request. Ti alloy should become a better suggestion for clinical use.