Chang J C, Powers J M, Hart D
Department of Removable Prosthodontics, University of Texas Houston Health Science Center, Dental Branch.
J Prosthodont. 1993 Jun;2(2):110-4. doi: 10.1111/j.1532-849x.1993.tb00391.x.
The in-vitro bond strengths of a composite bonded to a nickel-chromium-beryllium alloy treated by eight bonding systems were measured after three storage conditions.
Nickel-chromium-beryllium alloy samples were treated by eight commercial bonding systems including adhesive composite cements, all-purpose bonding agents, and silica-coating systems. A composite was bonded to the alloy samples. Sample groups were stored in water for 24 hours at 23 degrees C, or thermocycled, or stored for 6 months at 23 degrees C and then debonded in tension.
Bond strengths after 24 hours storage were: adhesive composite cements, 14.2 to 22.1 MPa; all-purpose bonding agents, 11.4 to 14.6 MPa; and silica-coating systems, 18.6 to 20.2 MPa. Bond strengths after thermocycling were: adhesive composite cements, 12.6 to 20.6 MPa; all-purpose bonding agents, 9.9 to 17.7 MPa; and silica-coating systems, 11.1 to 19.2 MPa. Bond strengths after 6 months were: adhesive composite cements, 12.0 to 13.1 MPa; all-purpose bonding agents, 8.7 to 14.1 MPa; and silica-coating systems, 14.8 to 18.4 MPa.
Only two bonding systems showed decreased bond strength after thermocycling, as compared with 24 hours' storage; whereas four bond systems showed decreased bond strength after 6 months' storage. Bond strengths measured after thermocycling were not predictive of those measured after 6 months' storage.
在三种储存条件后，测量通过八种粘结系统处理的复合材料与镍铬铍合金之间的体外粘结强度。
镍铬铍合金样本通过八种商业粘结系统进行处理，包括粘结复合粘结剂、通用粘结剂和二氧化硅涂层系统。将一种复合材料粘结到合金样本上。样本组在23摄氏度的水中储存24小时，或进行热循环处理，或在23摄氏度下储存6个月，然后进行拉伸脱粘。
储存24小时后的粘结强度为：粘结复合粘结剂，14.2至22.1兆帕；通用粘结剂，11.4至14.6兆帕；二氧化硅涂层系统，18.6至20.2兆帕。热循环后的粘结强度为：粘结复合粘结剂，12.6至20.6兆帕；通用粘结剂，9.9至17.7兆帕；二氧化硅涂层系统，11.1至19.2兆帕。6个月后的粘结强度为：粘结复合粘结剂，12.0至13.1兆帕；通用粘结剂，8.7至14.1兆帕；二氧化硅涂层系统，14.8至18.4兆帕。
与储存24小时相比，只有两种粘结系统在热循环后显示粘结强度降低；而四种粘结系统在储存6个月后显示粘结强度降低。热循环后测量的粘结强度不能预测储存6个月后测量的粘结强度。
