Universidade Federal do Amazonas - UFAM, School of Dentistry, Manaus, AM, Brazil.
Braz Oral Res. 2020 Jan 31;34:e001. doi: 10.1590/1807-3107bor-2020.vol34.0001. eCollection 2020.
This study analyzed the effect of prior application of copaiba oil (CO) emulsions as a dentin cleaning substance on microleakage and microtensile adhesive strength. Twenty-five premolars and sixty-four molars were used for microleakage and microtensile assays. For the microleakage assays, specimens with standard class V cavities were divided (n = 5), according to the tested CO emulsions: CO10%X, CO10%Y, and CO10%Z, as well as chlorhexidine 2% (CHX) and distilled water (DW), as positive and negative controls, respectively. Restorations were performed using the Adper Single Bond® and/or Clearfil SE Bond® systems. Cervical, occlusal, distal and mesial sections were assessed for tracer penetration degree at the composite/tooth interface. For the microtensile assay, healthy molars were divided into sixteen groups, in which artificial caries were induced in half of the groups. Dentin surfaces were treated with CO10%X and CO10%Y, CHX and DW. Microtensile bond strength was measured by fixing each sample to the plate of a universal testing machine operated at a speed of 0.5 mm/minute until failure. Dentin treated with CO10%X showed a lower infiltration rate than dentin treated with the other CO emulsions, CHX2% and DW. According to the microtensile assay, both healthy and affected dentin treated with CO10%X and Adper Single Bond® adhesive system presented higher adhesive strength. CO emulsion, used as a dentin biomodifier, interfered positively in microleakage and improved adhesive strength after acid etching in the Adper Single Bond® adhesive system, or before applying the Clearfil SE Bond® self-etching system.
本研究分析了先应用 Copaiba 油（CO）乳液作为牙本质清洁物质对微渗漏和微拉伸粘合强度的影响。使用 25 颗前磨牙和 64 颗磨牙进行微渗漏和微拉伸试验。对于微渗漏试验，根据所测试的 CO 乳液将具有标准 V 类腔的标本（n = 5）进行分组：CO10%X、CO10%Y 和 CO10%Z，以及洗必泰 2%（CHX）和蒸馏水（DW），分别作为阳性和阴性对照。使用 Adper Single Bond®和/或 Clearfil SE Bond®系统进行修复。对复合/tooth 界面处示踪剂渗透程度进行颈、咬合、远中和近中截面评估。对于微拉伸试验，将健康磨牙分为十六组，其中一半组诱导人工龋。用 CO10%X 和 CO10%Y、CHX 和 DW 处理牙本质表面。通过将每个样品固定在万能试验机的板上，以 0.5 毫米/分钟的速度操作，直到失效，测量微拉伸粘合强度。与用其他 CO 乳液、CHX2%和 DW 处理的牙本质相比，用 CO10%X 处理的牙本质的渗透速率较低。根据微拉伸试验，用 CO10%X 和 Adper Single Bond®粘合系统处理的健康和受影响牙本质均表现出较高的粘合强度。作为牙本质生物调节剂的 CO 乳液在 Adper Single Bond®粘合系统中酸蚀后或在应用 Clearfil SE Bond®自酸蚀系统之前，对微渗漏有积极的影响，并提高了粘合强度。
