Papia Evaggelia, Arnoldsson Pernilla, Baudinova Ayna, Jimbo Ryo, Vult VON Steyern Per
Department of Materials Science and Technology, Faculty of Odontology, Malmö University.
Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University.
Dent Mater J. 2018 Mar 30;37(2):214-221. doi: 10.4012/dmj.2016-404. Epub 2017 Sep 7.
The objectives were to analyze the oxide layer generated between titanium and porcelain during firing and compare it in different manufacturing techniques: cast, milled and EBM-technique. Seventy two specimens were manufactured, subdivided according to surface treatment: time of passivation (P) and no time of passivation (NP) before porcelain firing. Specimens from each group were analyzed with scanning electron microscopy: one only fired once, and one subjected to six firings. Remaining specimens were subjected to shear bond strength test. The EBM-produced NP-group had highest mean value (25.0 MPa) and the milled P-group showed lowest mean value (18.5 MPa) when all factors were compared. No significant difference was detected according to time of passivation. SEM showed consistent and well-defined boundary between the different layers. Time of passivation and impact on oxide growth was not detected. The bond strength of porcelain to milled titanium is lower when compared to cast titanium and EBM-produced titanium.
目的是分析烧制过程中钛与瓷之间生成的氧化层，并比较不同制造技术（铸造、铣削和电子束熔炼技术）下的氧化层情况。制造了72个样本，根据表面处理进行细分：在瓷烧制前的钝化时间（P）和无钝化时间（NP）。每组样本用扫描电子显微镜进行分析：一个仅烧制一次，另一个进行六次烧制。其余样本进行剪切粘结强度测试。当比较所有因素时，电子束熔炼生产的NP组具有最高平均值（25.0兆帕），而铣削P组显示最低平均值（18.5兆帕）。未检测到根据钝化时间的显著差异。扫描电子显微镜显示不同层之间有一致且界限分明的边界。未检测到钝化时间对氧化物生长的影响。与铸造钛和电子束熔炼生产的钛相比，瓷与铣削钛之间的粘结强度较低。
