Avinash Kondumahanti V N, Reddy Vahini, Shetty Jayakar, Nitin H C
Departments of Prosthodontics and Crown and Bridge, AECS Maaruti College of Dental Sciences and Research Center, Bengaluru, Karnataka, India.
Contemp Clin Dent. 2019 Jan-Mar;10(1):47-51. doi: 10.4103/ccd.ccd_207_18.
The most appropriate luting agent for titanium crowns is yet to be determined. Commonly used cements for luting titanium restorations give off leachable ions which may cause surface interaction with the titanium.
The purpose of this study was to determine the shear bond strength of four grades of commercially pure titanium and Ti 6Al 4V with different cements and to examine for any surface physical changes.
The three luting cements, i.e., zinc polycarboxylate cement, glass ionomer cement, and zinc phosphate cement, were used to evaluate their effect on titanium. Ni Cr was used as a control.
The metal rods were milled to discs of 6 mm diameter and 4 mm height. Freshly extracted maxillary first molars, mounted in resin blocks, were sliced horizontally at occlusal third of the tooth. The discs were cemented to the sliced surface of the tooth with the three luting cements. The models were subjected to the shear bond strength test. Statistical analysis used: The data collected were analyzed statistically with one way ANOVA. A representative specimen of each group was observed under a scanning electron microscope.
The mean values ranged from 0.31 to 15.6 MPa. The shear bond strength values of the zinc polycarboxylate cement group were significantly high ( < 0.05). Corrosion of the titanium alloy luted with zinc polycarboxylate cement was observed.
Cementation with zinc polycarboxylate cement provided high shear bond strength, but showed corrosion on titanium.
用于钛冠的最合适的粘结剂尚未确定。用于粘结钛修复体的常用粘结剂会释放可溶出离子，这可能会导致与钛发生表面相互作用。
本研究的目的是确定四种商业纯钛和Ti 6Al 4V与不同粘结剂的剪切粘结强度，并检查是否有任何表面物理变化。
使用三种粘结剂，即聚羧酸锌粘结剂、玻璃离子粘结剂和磷酸锌粘结剂，来评估它们对钛的影响。镍铬合金用作对照。
将金属棒加工成直径6mm、高4mm的圆盘。将新鲜拔除的上颌第一磨牙安装在树脂块中，在牙合面三分之一处水平切片。用三种粘结剂将圆盘粘结到牙齿的切片表面。对模型进行剪切粘结强度测试。统计分析方法：收集的数据采用单因素方差分析进行统计学分析。每组选取一个代表性标本在扫描电子显微镜下观察。
平均值范围为0.31至15.6MPa。聚羧酸锌粘结剂组的剪切粘结强度值显著较高（<0.05）。观察到用聚羧酸锌粘结剂粘结的钛合金有腐蚀现象。
聚羧酸锌粘结剂粘结提供了较高的剪切粘结强度，但对钛有腐蚀作用。
