de Veras Bruno-Mendonça-Lucena, Guimarães Renata-Pedrosa, Alves Luiz-Carlos, Padilha Rafael-José-Ribeiro, Fernandes Luana-Osório, Aguiar Carlos-Menezes
PhD student - UFPE - Federal University of Pernambuco, Department of Prosthetic Dentistry and Maxillofacial Surgery, 1235 Professor Moraes Rego Ave, Recife, PE, 50670901, Brazil.
PhD, Associate teacher -UFPE - Federal University of Pernambuco, Department of Prosthetic Dentistry and Maxillofacial Surgery, 1235 Professor Moraes Rego Ave, Recife, PE, 50670901, Brazil.
J Clin Exp Dent. 2020 Dec 1;12(12):e1100-e1108. doi: 10.4317/jced.57402. eCollection 2020 Dec.
This study compared the quality of marginal sealing in the gingival wall of class II preparations of two low-shirinkage resins of the bulk fill type with a conventional resin isolated or associated with a glass ionomer cement (GIC).
40 human molars were divided into 4 groups and 80 occlusal-mesial and occlusal-distal restorations were performed with the following materials: SureFil SDR flow, Filtek Bulk Fill Posterior, Z250 resins and Riva Light Cure GIC. 40 restorations were evaluated in Scanning Electron Microscopy (SEM) with Elemental Microanalysis Spectrometry (EDS) initially and the remainder after a period of 6 months of aging in a 37 ± 5°C oven. An average of the silver penetration at each restoration was obtained in the two evaluations and the results were statistically analyzed in a descriptive and inferential way, through the paired t-Student and one-way ANOVA F-test.
There were no significant statistical differences between the materials with respect to silver nanoinfiltration, except for the Bulk Fill Posterior/3M ESPE resin compared to the GIC and conventional resin in the final evaluation.
The low shrinkage resins showed a similar behavior in relation to the marginal sealing quality observed in the GIC or composite resin with the incremental technique, also presenting the advantage of simplicity in the technique of confection of the restorations and reduction of the time of work. Resin composites, Bulk fill, dental restorations, marginal quality, adhesion.
本研究比较了两种大块充填型低收缩树脂与传统树脂单独使用或与玻璃离子水门汀（GIC）联合使用时，II类洞龈壁边缘封闭的质量。
将40颗人类磨牙分为4组，用以下材料进行80次近中咬合面和远中咬合面修复：SureFil SDR flow、Filtek Bulk Fill Posterior、Z250树脂和Riva Light Cure GIC。最初对40个修复体进行扫描电子显微镜（SEM）和能谱微分析（EDS）评估，其余修复体在37±5°C的烤箱中老化6个月后进行评估。在两次评估中获得每个修复体的银渗透平均值，并通过配对t检验和单因素方差分析F检验对结果进行描述性和推断性统计分析。
除最终评估中Bulk Fill Posterior/3M ESPE树脂与GIC和传统树脂相比，材料之间在银纳米渗透方面无显著统计学差异。
低收缩树脂在边缘封闭质量方面表现出与GIC或采用分层技术的复合树脂相似的行为，还具有修复体制作技术简单和工作时间缩短的优点。树脂复合材料、大块充填、牙齿修复、边缘质量、粘结。
