Performance of a conventional sealant and a flowable composite on minimally invasive prepared fissures.
Performance of a conventional sealant and a flowable composite on minimally invasive prepared fissures.
复制标题
传统密封剂和可流动复合材料在微创预备裂隙上的性能。
DOI：
10.2341/05-91
复制
发表时间：
2006
影响因子：
2.2
通讯作者：
A. Lussi
中科院分区：
文献类型：
--
作者：
P. Francescut;A. Lussi
研究人员测试了三种不同的裂缝制备方法，并将其与使用常规未填充密封剂和可流动复合材料的非侵入性方法进行了比较。选择恒磨牙80颗，分为4组，每组20颗。将所有牙齿分成两半，制备前后在显微镜下（35倍）拍照，方法如下：(1)Er:YAG激光（KEY laser, KaVo） 600 mJ脉冲能量，6 Hz；（二）金刚钻；（三）Er: YAG激光器（KEY laser, KaVo）脉冲能量200mj， 4hz；（四）对照组：粉末喷射清洗剂（德国卡沃公司Prophyflex）。将前后图像叠加，以评估去除硬组织的数量。然后，每组10颗牙齿进行酸蚀和未填充密封剂（Delton opaque, Dentsply）密封，其余10颗牙齿进行酸蚀、酸蚀和粘合（Prime & Bond NT, Dentsply），并用可流动复合材料（X-flow, DeTrey, Dentsply）密封。热循环（5000次）和5%亚甲基蓝染色后评估材料渗透和微泄漏。采用方差分析和Mann-Whitney检验进行统计分析。600兆焦耳的激光消除了最大量的硬组织。用Delton或X-flow密封时，控制齿的微泄漏最小。材料渗透与微泄漏之间的相关性不能从统计学上得到证实。在裂缝密封之前进行机械制备并不能提高密封胶的最终性能。
Three different fissure preparation procedures were tested and compared to the non-invasive approach using a conventional unfilled sealant and a flowable composite. Eighty permanent molars were selected and divided into 4 groups of 20 teeth each. All the teeth were split into 2 halves, and the exposed fissures were photographed under a microscope (35x) before and after being prepared using the following methods: (I) Er:YAG laser (KEY Laser, KaVo) 600 mJ pulse energy, 6 Hz; (II) diamond bur; (III) Er: YAG laser (KEY Laser, KaVo) 200 mJ pulse energy, 4 Hz; (IV) Control group: Powder jet cleaner (Prophyflex, KaVo, Germany). The pre-and postimages were superimposed in order to evaluate the amount of hard tissue removed. Ten teeth in each group were then acid etched and sealed with an unfilled sealant (Delton opaque, Dentsply), while the remaining 10 teeth were acid etched, primed and bonded (Prime & Bond NT, Dentsply) and sealed with a flowable composite (X-flow, DeTrey, Dentsply). Material penetration and microleakage were evaluated after thermocycling (5000 cycles) and staining with methylene blue 5%. ANOVA and Mann-Whitney tests were applied for statistical analysis. The laser 600 mJ and bur eliminated the greatest amount of hard tissue. The control teeth presented the least microleakage when sealed with Delton or X-flow. A correlation between material penetration and microleakage could not be statistically confirmed. Mechanical preparation prior to fissure sealing did not enhance the final performance of the sealant.