Hoshika Shuhei, De Munck Jan, Sano Hidehiko, Sidhu Sharan Kabir, Van Meerbeek Bart
J Adhes Dent. 2015 Apr;17(2):141-6. doi: 10.3290/j.jad.a33994.
To determine the bond stability and the change in interfacial ultrastructure of a conventional glassionomer cement bonded to dentin, with and without pretreatment using a polyalkenoic acid conditioner.
The occlusal dentin surfaces of 10 teeth were ground flat. Glass-ionomer cement was bonded to the surfaces either with or without polyalkenoic acid conditioning. The teeth were sectioned into 1-mm2 stick-shaped specimens. The 200 specimens obtained were randomly assigned to four groups with different periods of storage in water: 1 week, 1 month, 3 months, and 6 months. The microtensile bond strength (μTBS) was determined for each storage time. Additional specimens were prepared for transmission electron microscopy (TEM); they were produced with or without prior polyalkenoic acid conditioning in the same manner as for the μTBS test.
There was no significant difference in μTBS to conditioned dentin (p > 0.05). After 6 months of aging, the μTBS to non-conditioned dentin was significantly reduced as compared to the 1-week, 1-month, and 3-month results (p < 0.05). The failures appeared to be of a mixed nature, although aging caused more areas of cohesive than adhesive failure in all groups. TEM observation showed a demineralized layer and an amorphous gel phase in the polyalkenoic acid conditioned group.
Aging did not reduce the bond strength of the conventional glass-ionomer cement to dentin when the surface was pretreated with a polyalkenoic acid conditioner.
确定使用和不使用聚羧酸调节剂预处理的情况下，传统玻璃离子水门汀与牙本质粘结的粘结稳定性及界面超微结构变化。
将10颗牙齿的咬合面牙本质表面磨平。玻璃离子水门汀在有或没有聚羧酸预处理的情况下粘结于这些表面。将牙齿切成1平方毫米的棒状标本。所获得的200个标本随机分为四组，在水中储存不同时间：1周、1个月、3个月和6个月。测定每个储存时间的微拉伸粘结强度（μTBS）。制备额外的标本用于透射电子显微镜（TEM）观察；制备方式与μTBS测试相同，有或没有聚羧酸预处理。
经预处理的牙本质的μTBS无显著差异（p>0.05）。老化6个月后，与1周、1个月和3个月的结果相比，未经预处理牙本质的μTBS显著降低（p<0.05）。尽管老化在所有组中导致内聚性破坏的区域多于粘结性破坏，但破坏似乎是混合性质的。TEM观察显示，聚羧酸预处理组存在脱矿层和无定形凝胶相。
当用聚羧酸调节剂对表面进行预处理时，老化不会降低传统玻璃离子水门汀与牙本质的粘结强度。
