Caceres Sheyla, Ayala Gerardo, Alvítez-Temoche Daniel, Suarez Daniel, Watanabe Romel, Mayta-Tovalino Frank
Academic Department, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru.
Department of Stomatology Rehabilitation, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru.
J Int Soc Prev Community Dent. 2020 Aug 6;10(4):466-472. doi: 10.4103/jispcd.JISPCD_378_19. eCollection 2020 Jul-Aug.
The objective of this study was to evaluate the bond strength to microtraction and nanofiltration using ethanol wet bonding technique in fresh extracted teeth.
This quasi-experimental study evaluated 48 teeth that had an indication of premolar extraction due to orthodontic reasons. The protocol of dental preparation and restorative procedure was carried out to evaluate the adhesion resistance by means of the universal testing machine at a loading speed of 0.5 mm/min and 500MPa. To evaluate the nanofiltration, matches were made that were immersed in ammoniac silver nitrate for 24h, and then the specimens impregnated with silver were washed thoroughly in distilled water and placed in a photo-developer solution for 8h under a fluorescent light. All statistical analyses were statistically evaluated with a level of significance < 0.05.
The ethanol technique without premature failure (PF) group had an average of 31.26 ± 10.26MPa, whereas the lowest value was found in the water technique group with PF, which had 22.59 ± 12.27MPa. When performing inferential statistics, it was evidenced that there were statistically significant differences between both techniques with a value of < 0.05.
According to the results in both cases, the adhesive strength showed superiority in the ethanol wash group. It determines that this technique presents greater tolerance to the residual presence of water. Finally, in relation to nanofiltration we found that there were no significant differences between the groups evaluated.
本研究的目的是评估在新鲜拔除的牙齿中使用乙醇湿粘结技术时的微牵引和纳米过滤粘结强度。
这项准实验研究评估了48颗因正畸原因有拔除前磨牙指征的牙齿。进行了牙齿预备和修复程序方案，以通过万能试验机在0.5毫米/分钟的加载速度和500兆帕的压力下评估粘结抗力。为了评估纳米过滤，制作了匹配物，将其浸入硝酸银氨溶液中24小时，然后将浸渍有银的标本在蒸馏水中彻底冲洗，并在荧光灯下置于显影液中8小时。所有统计分析的显著性水平均<0.05。
无早期失败（PF）的乙醇技术组平均为31.26±10.26兆帕，而有PF的水技术组最低，为22.59±12.27兆帕。进行推断统计时，证明两种技术之间存在统计学上的显著差异，值<0.05。
根据两种情况下的结果，乙醇冲洗组的粘结强度显示出优势。这表明该技术对水的残留存在具有更大的耐受性。最后，关于纳米过滤，我们发现评估的组之间没有显著差异。
