Ti2448与纯钛金瓷结合强度的对比评价

Evaluation of titanium porcelain duceratin bonded to cast Ti2448 alloys and Cp-Ti.

目的:对比相同条件下Ti2448与纯钛的金瓷结合强度,评价Ti2448的烤瓷性能。方法:采用纯钛常规喷砂方法对纯钛和Ti2448分别进行表面处理,测试处理后的金属表面粗糙度、表面能,采用三点弯曲实验对两种金属与Duceratin Kiss瓷粉的结合强度进行评价,采用扫描电镜和能谱分析对金瓷结合界面的显微结构和成分组成进行分析。结果:经相同的喷砂处理后的粗糙度、表面能和三点弯曲结合强度,纯钛组为0.588μm、78.70 mJ/m2和23.89 MPa,Ti2448组为0.621μm、94.17 mJ/m2和31.51 MPa,Ti2448组的各项指标均高于纯钛组,经t检验均具有显著性差异(P<0.05)。扫描电镜和能谱分析结果显示Ti2448组的瓷剥脱面有更多的残留瓷,且有Sn元素贯穿金瓷界面渗入瓷层。结论:利用纯钛的常规表面处理方法对Ti2448进行表面处理能够获得优于纯钛的表面润湿性和瓷结合强度,并达到了临床要求。

Objective：To compare the bonding characteristics of titanium porcelain Duceratin bonded to Ti2448 alloys and commercially pure titanium（cp-Ti）.Method：Ti2448 specimen and cp-Ti specimen were respectively treated by the sand-blasting method,which was applied usually to pure Titanium for PFM prosthesis in clinic.The relative properties of the treated Ti2448 and cp-Ti were tested including the roughness,the surface energy and the three-point-bending strength to Duceratin Kiss porcelain.The micro-structure and the composition of metal-porcelain interface were examined by SEM and EDS.Result：The roughness,the surface energy and the three-point-bending strength of Ti2448（0.621 μm,94.17 mJ/m2 and 31.51 MPa） were all higher than those of cp-Ti（0.588 μm,78.70 mJ/m2 and 23.89 MPa）.Considering the above properties,there was difference statistically between Ti2448 and cp-Ti respectively（P 0.05）.There was massive residual porcelain on the metal-porcelain departure surface of the specimen in Ti2448 group,but not in cp-Ti group.On the section of metal-porcelain specimen,the Sn was observed penetrating into the porcelain layer in Ti2448 group.Conclusion：The good surface wettability and porcelain bonding strength can be obtained on Ti2448 surface treated by the usual sand-blasting for pure Titanium,and the bonding strength can meet the clinical demand.