Naik Asmita Sadanand, De Ataide Ida De Noronha, Fernandes Marina
Department of Conservative Dentistry and Endodontics, Goa Dental College and Hospital, Bambolim, Goa, India.
J Conserv Dent Endod. 2024 Aug;27(8):838-842. doi: 10.4103/JCDE.JCDE_358_24. Epub 2024 Aug 7.
The aim of this study was to evaluate the influence of 970 nm diode laser (DL) irradiation on the microtensile bond strength (TBS) of etch-and-rinse adhesive (ERA) to dentin using phosphoric acid (PA) or alpha-hydroxy glycolic acid (GA) as etchants.
A total of 32 human third molars were selected and assigned randomly among two different groups and four subgroups based on etching protocols and DL irradiation: PA, PA-DL, GA, and GA-DL. After tooth preparation and subsequent incremental composite build-up, the samples were stored in distilled water for 24 h at 37°C. TBS values were obtained using the universal testing machine. The failure modes observed in dentin were categorized as adhesive, cohesive within dentin/resin, or mixed.
The data were analyzed using one-way analysis of variance, followed by Tukey's test ( ≤ 0.001).
GA showed better or similar bond strength values to PA. Furthermore, irradiation of DL increased the TBS to dentin when both PA or GA are used as etchants.
GA can be used as an alternative etchant to PA. DL irradiation stands as a promising approach for elevating the performance of ERA adhesive systems to dentin.
本研究旨在评估970纳米二极管激光（DL）照射对使用磷酸（PA）或α-羟基乙醇酸（GA）作为蚀刻剂的酸蚀冲洗粘合剂（ERA）与牙本质之间微拉伸粘结强度（TBS）的影响。
共选取32颗人类第三磨牙，根据蚀刻方案和DL照射情况随机分为两个不同组和四个亚组：PA、PA-DL、GA和GA-DL。在牙齿预备及后续逐层复合树脂堆积后，将样本在37°C蒸馏水中储存24小时。使用万能试验机获得TBS值。观察到的牙本质失效模式分为粘结性、牙本质/树脂内聚性或混合性。
数据采用单因素方差分析，随后进行Tukey检验（P≤0.001）。
GA显示出与PA相当或更好的粘结强度值。此外，当PA或GA用作蚀刻剂时，DL照射均能提高ERA与牙本质之间的TBS。
GA可作为PA的替代蚀刻剂。DL照射是提高ERA粘合剂系统与牙本质粘结性能的一种有前景的方法。
