背景:嵌入牙本质细胞外基质中的生长因子在迁移中起重要作用,扩散,牙髓干细胞在再生牙髓中的分化。在再生牙髓治疗中,使用的冲洗溶液的类型对于从牙本质基质中释放生长因子(GFs)至关重要。本研究评估了使用两种不同螯合剂的不同冲洗剂活化技术(IAT)的有效性,17%乙二胺四乙酸(EDTA)和9%依替膦酸(HEDP),就其GF释放而言。
方法:准备72颗下颌前磨牙以模拟开放的根尖。用20ml的1.5%次氯酸钠和20ml的盐溶液冲洗根碎片。随机分离8根碎片作为对照组,其余64个片段根据两种不同的螯合剂(17%EDTA和9%HEDP)和四种不同的IAT((常规针头冲洗(CNI),被动超声冲洗(PUI),用EDDY进行声波激活,和XP-endoFinisher(XPF))。TGF-β1,VEGF-A,使用ELISA测定BMP-7和IGF-1释放水平,使用Kolmogorov-Smirnov检验进行统计分析,方差分析,和Tukey测试(p<0.05)。
结果:与对照组相比,当使用EDTA或HEDP时,实验组显示出显著更高的GF释放。在激活组中,EDDY组触发了最高的GF释放,CNI组触发了最低的。
结论:IAT与EDTA和HEDP可以增加GF的释放,EDDY是最有效的IAT方法。使用螯合剂与IAT在再生牙髓治疗中可能是有益的。
BACKGROUND: Growth factors embedded in the extracellular matrix of the dentin play an important role in the migration, proliferation, and differentiation of dental pulp stem cells in regenerative endodontics. In regenerative endodontic treatments, the type of irrigation solution used is crucial for the release of growth factors (GFs) from the dentin matrix. This
study evaluated the effectiveness of different irrigant activation techniques (IAT) using two different chelating agents, 17% ethylenediaminetetraacetic acid (EDTA) and 9% etidronic acid (HEDP), in terms of their GF release.
METHODS: Seventy-two mandibular premolar teeth were prepared to simulate an open apex. The root fragments were irrigated with 20 ml of 1.5% sodium hypochlorite and 20 ml of saline solution. Eight root fragments were randomly separated for the control group, and the remaining 64 fragments were randomly separated into eight groups based on two different chelating agents (17% EDTA and 9% HEDP) and four different IAT ((conventional needle irrigation (CNI), passive ultrasonic irrigation (PUI), sonic activation with EDDY, and XP-endo Finisher (XPF)). TGF-β1, VEGF-A, BMP-7 and IGF-1 release levels were determined using an ELISA, and statistical analysis was performed using the Kolmogorov-Smirnov test, ANOVA, and the Tukey test (p < .05).
RESULTS: Compared to the control group, the experimental groups showed significantly higher GF release when using EDTA or HEDP. Among the activation groups, the EDDY group triggered the highest GF release, and the CNI group triggered the lowest.
CONCLUSIONS: IAT with EDTA and HEDP can increase GF release, with EDDY being the most effective IAT method. Using chelating agents with IAT may be beneficial in regenerative endodontic treatments.