Lopez J I
Am J Orthod. 1980 Jun;77(6):669-78. doi: 10.1016/0002-9416(80)90158-x.
The purpose of this study was to determine whether any of the commercially available attachment bases had significantly better retentive properties. This was determined by their shear strengths after all were bonded to bovine incisors with Auto-Tach. The mean shear strengths of sixteen bases were statistically compared to each other at 24 hours and at 30 days. In addition, the data were converted to pounds per square inch to ascertain if the size of the base significantly influenced the mean shear strength. It was concluded that (1). one of the foil mesh bases tested for shear strength was significantly superior to the two other base designs (indents with undercuts and solid bases with perforations); (2). mechanical retention of the attachment bases to the adhesive was not significantly affected after being placed in distilled water at 37 degrees C. either for 24 hours or for 30 days; (3). smaller foil mesh bases could be used without sacrificing significant shear strength.
本研究的目的是确定是否有任何市售的附着基托具有明显更好的固位性能。通过将所有附着基托用自动喷枪粘结到牛切牙上后测试其抗剪强度来确定这一点。在24小时和30天时，对16种基托的平均抗剪强度进行了相互间的统计学比较。此外，将数据转换为每平方英寸磅数，以确定基托尺寸是否对平均抗剪强度有显著影响。得出的结论是：(1). 测试抗剪强度的一种箔网基托明显优于其他两种基托设计（带倒凹的凹痕和带穿孔的实心基托）；(2). 将附着基托置于37℃蒸馏水中24小时或30天后，其与粘合剂的机械固位未受到显著影响；(3). 可以使用较小的箔网基托而不牺牲显著的抗剪强度。
