McCarthy M F, Hondrum S O
US Army Dental Corps, U.S. Army Orthodontic Residency Program, Fort George G. Meade, Md.
Am J Orthod Dentofacial Orthop. 1994 Feb;105(2):135-41. doi: 10.1016/S0889-5406(94)70109-1.
The purpose of this study was to evaluate the mechanical and bond strength properties of a commercially available light-cured glass ionomer cement and of a chemically cured glass ionomer cement. Sixty recently extracted human molars were randomly divided into six equal groups, and the bond strengths of the two cement types were evaluated at 1 hour, 24 hours, and 7 days. Stainless steel lingual buttons were bonded to prepared enamel surfaces, and the samples were placed in a water bath at 37 degrees C until testing. The shear bond strength of each sample was determined with a universal testing instrument. The mechanical strength properties of the two cements were then evaluated. The transverse flexural strength, compressive strength, rigidity, and diametral tensile strength were tested for each cement at 1 hour, 24 hours, and 7 days. The results of the mechanical property strength tests were then compared with the results of the bond strength tests.(ABSTRACT TRUNCATED AT 250 WORDS)
本研究的目的是评估一种市售光固化玻璃离子水门汀和一种化学固化玻璃离子水门汀的力学性能和粘结强度特性。60颗近期拔除的人类磨牙被随机分为六组，在1小时、24小时和7天时评估两种水门汀类型的粘结强度。将不锈钢舌钮粘结到预备好的牙釉质表面，样本置于37℃水浴中直至测试。用万能测试仪器测定每个样本的剪切粘结强度。然后评估两种水门汀的力学性能特性。在1小时、24小时和7天时对每种水门汀测试其横向抗折强度、抗压强度、刚性和直径拉伸强度。然后将力学性能强度测试结果与粘结强度测试结果进行比较。（摘要截选至250字）
