目的:评价高粘性锌增强玻璃离子水门汀(ZRGIC)的渗透性和适应性,使用扫描电子显微镜(SEM),当在各种污染条件下应用于初级第二磨牙的凹槽和裂缝时。材料和方法:将40颗拔除的人初级第二磨牙随机分为五组(每组8颗牙齿),具有不同的表面条件(用40%聚丙烯酸调理,干燥条件,水污染,唾液污染,或唾液污染和空气干燥)在使用手指按压技术放置锌增强的高粘性玻璃离聚物水泥之前,在咬合面上。切开牙齿后,对它们进行了扫描电镜分析,其中每组中的四个通过热循环进行老化,其他四个没有老化。方差分析测试,事后分析,非配对t检验用于统计分析。结果:非老化组密封胶针入度差异有统计学意义,但是在老龄化群体中,密封胶渗透无显著统计学差异。另一方面,各组间的适应性差异有统计学意义(p<0.05)。高粘度锌增强玻璃离聚物裂缝密封剂在40%聚丙烯酸和干燥表面裂缝条件下具有更好的裂缝渗透性和更紧密的适应,无污染。然而,老化后最好的渗透和保留是在有光泽的唾液层的污染裂缝下。结论:ZRGIC是一种高粘性氟化物释放水泥,通过干扰食物滞留和保护牙齿免受龋齿,有效地密封裂缝。建议用最小的敏感氟化物释放GIC技术恢复裂缝,尤其是在年轻人中,不合作的孩子,而不是离开一个容易龋齿的环境。
Objective: To evaluate the penetration and adaptation of highly viscous zinc-reinforced glass ionomer cement (ZRGIC), using a scanning electron microscope (SEM), when applied under various contaminated conditions on grooves and
fissures of primary second molars. Materials and Methods: A total of 40 extracted human primary second molars were randomly assigned into five groups (8 teeth each), with different surface conditions (conditioned with 40% polyacrylic acid, dry condition, water contamination, saliva contamination, or saliva contamination and air-drying) on the occlusal surface before placement of zinc-reinforced highly viscous glass ionomer cement with the finger-press technique. After sectioning the teeth, they were subjected to SEM analysis, where four in each group underwent aging by thermocycling and the other four were without aging. ANOVA tests, post hoc analysis, and unpaired t-tests were used for statistical analyses. Results: There was a significant statistical difference in the sealant penetration in the non-aging group, but in the aging group, there was no significant statistical difference in the sealant penetration. On other hand, a significant statistical difference was found in the adaptation between all the groups (p < 0.05). Highly viscous zinc-reinforced glass ionomer fissure sealants have better fissure penetration and more intimate adaptation under fissures conditioned with 40% polyacrylic acid and dry surface
fissures with no contamination. However, the best penetration and retention after aging were under contaminated
fissures with a shiny layer of saliva. Conclusions: The ZRGIC is a highly viscous fluoride-releasing cement, effectively seals
fissures by interfering with food lodgment and protecting teeth from caries. It is advisable to restore the
fissures with the minimal technique of sensitive fluoride-releasing GIC, particularly in young, uncooperative children, rather than leaving a caries-prone environment.