Şahin Mantı Arzu, Helvacıoğlu Kıvanç Bağdagül
Department of Endodontics, Faculty of Dentistry, Gazi University, 06490 Ankara, Türkiye.
J Funct Biomater. 2024 Dec 8;15(12):370. doi: 10.3390/jfb15120370.
Bond strength between repair and restorative materials is crucial for endodontic success. This study assessed the effects of the following final irrigation solutions on the bond strength of mineral trioxide aggregate (MTA) to a bulk-fill composite: (1) 17% Ethylenediamine tetraacetic acid (EDTA); (2) 2% Chlorhexidine (CHX); (3) 0.2% chitosan; (4) 0.2% chitosan with 2% CHX; 5) 0.2% chitosan with AgNPs. : Sixty MTA samples were divided into six groups ( = 10) based on the final irrigation solution: 1. EDTA, 2. CHX, 3. Chitosan, 4. Chitosan-CHX, 5. Chitosan-AgNP, and 6. distilled water (control). After a 5-min solution exposure, each sample was restored with the bulk-fill composite, and the shear bond strength (SBS) was measured. Structural changes in MTA were analyzed using SEM and EDS, and failure modes were classified as adhesive, cohesive, or mixed. Data were analyzed by one-way ANOVA with Tamhane's T2 and Tukey's tests (α = 0.05). EDTA exhibited the lowest SBS ( < 0.001), while Chitosan-CHX showed the highest. SEM showed a spongy, void-rich surface in EDTA-treated MTA, with significant Ca depletion per EDS. Chitosan-CHX showed no structural change. Cohesive fractures within MTA were predominant. : EDTA significantly reduces SBS, while chitosan with CHX enhances bond strength.
修复材料与充填修复材料之间的粘结强度对于牙髓治疗的成功至关重要。本研究评估了以下几种最终冲洗液对三氧化矿物凝聚体（MTA）与大块充填复合树脂粘结强度的影响：（1）17%乙二胺四乙酸（EDTA）；（2）2%氯己定（CHX）；（3）0.2%壳聚糖；（4）0.2%壳聚糖与2% CHX；（5）0.2%壳聚糖与银纳米颗粒。将60个MTA样本根据最终冲洗液分为六组（每组n = 10）：1. EDTA组，2. CHX组，3. 壳聚糖组，4. 壳聚糖-CHX组，5. 壳聚糖-银纳米颗粒组，6. 蒸馏水（对照组）。在溶液中暴露5分钟后，每个样本用大块充填复合树脂进行修复，并测量剪切粘结强度（SBS）。使用扫描电子显微镜（SEM）和能谱仪（EDS）分析MTA的结构变化，并将失效模式分为粘结性、内聚性或混合性。数据采用单因素方差分析以及Tamhanes T2检验和Tukey检验进行分析（α = 0.05）。EDTA组的SBS最低（P < 0.001），而壳聚糖-CHX组的SBS最高。SEM显示，经EDTA处理的MTA表面呈海绵状且富含孔隙，EDS分析显示钙显著减少。壳聚糖-CHX组未显示结构变化。MTA内部的内聚性断裂占主导。EDTA显著降低SBS，而壳聚糖与CHX可提高粘结强度。
