Lupita Cassandra, Bojoga Daliana Emanuela, Del Vecchio Alessandro, Stoia Dan Ioan, Grozav Ion, Miron Mariana Ioana, Todea Darinca Carmen
Department of Oral Rehabilitation and Dental Emergencies, Faculty of Dentistry, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania.
Interdisciplinary Research Center for Dental Medical Research, Lasers and Innovative Technologies, 300041 Timisoara, Romania.
Dent J (Basel). 2024 Jul 26;12(8):237. doi: 10.3390/dj12080237.
(1) Background: This study aimed to evaluate how laser-activated irrigation (LAI) influences the retention of a fiber post when used before an endodontic filling, as well as after post space preparation. (2) Materials and Methods: Sixty freshly extracted human incisors were selected. The teeth were randomly assigned to three groups-CONVENTIONAL (CONV), PIPS or SWEEPS-and treated endodontically. Each group received irrigation with 1 × 5 mL EDTA (17%) and 3 × 5 mL NaOCl (5.25%). In the first group, the irrigants were not activated, while in the second and third group, LAI was adopted using PIPS and SWEEPS protocols (Lightwalker from Fotona, Ljubliana, Slovenia). After post space preparation, each group received the same irrigation protocol initially established. Sticky posts (everStick Post, GC AUSTRIA GmbH Swiss) were individually adapted to the corresponding post spaces and cemented using dual cure resin cement (Gradia Core, GC Austria GmbH Swiss). All specimens were vertically embedded into self-curing acrylate (Duracryl plus, Spofa Dent, Europe), and each was sectioned into three segments of type A and type B samples for debonding through push-out and pull-out tests. The results were statistically analyzed. (3) Results: The pull-out test showed the superiority of the SWEEPS group, with a mean fracture force of 133.0 ± 50.7 N, followed by the PIPS group, with 102 N, with a lower standard deviation of ± 34.5 N. The CONV group registered the lowest fracture force. Concerning the push-out test, the SWEEPS group showed superior shear stress in comparison to the other two groups (13.45 ± 4.29 MPa); the CONV group was inferior, with shear tension values of 8.31 ± 4.67 MPa. (4) Conclusions: It can be stated that the SWEEPS and PIPS protocols resulted in considerably higher fiber post retention than the conventional method, whereas the SWEEPS protocol was superior to the PIPS protocol.
(1) 背景：本研究旨在评估激光激活冲洗（LAI）在根管充填前以及桩道预备后使用时，对纤维桩固位力的影响。(2) 材料与方法：选取60颗新鲜拔除的人切牙。将牙齿随机分为三组——传统组（CONV）、PIPS组或SWEEPS组——并进行根管治疗。每组均接受1×5 mL乙二胺四乙酸（17%）和3×5 mL次氯酸钠（5.25%）冲洗。第一组未激活冲洗液，而第二组和第三组采用PIPS和SWEEPS方案（来自斯洛文尼亚卢布尔雅那Fotona公司的Lightwalker）进行LAI。桩道预备后，每组均接受最初确定的相同冲洗方案。将粘性桩（everStick Post，瑞士GC AUSTRIA GmbH公司）分别适配到相应的桩道中，并用双固化树脂水门汀（Gradia Core，瑞士GC Austria GmbH公司）粘结。所有标本垂直嵌入自固化丙烯酸树脂（Duracryl plus，欧洲Spofa Dent公司）中，每个标本均切成三段，分为A型和B型样本，通过推出和拔出试验进行脱粘。对结果进行统计学分析。(3) 结果：拔出试验显示SWEEPS组具有优势，平均断裂力为133.0±50.7 N，其次是PIPS组，为102 N，标准差较低，为±34.5 N。CONV组的断裂力最低。关于推出试验，SWEEPS组与其他两组相比显示出更高的剪切应力（13.45±4.29 MPa）；CONV组较差，剪切张力值为8.31±4.67 MPa。(4) 结论：可以说，SWEEPS和PIPS方案导致的纤维桩固位力明显高于传统方法，而SWEEPS方案优于PIPS方案。
