Influence of filling materials on the fracture resistance of resin composite used for sealing screw access hole

Revista de Odontologia da UNESP Pub Date : 2022-01-01 DOI:10.1590/1807-2577.02421

R. Pereira, C. O. M. Rocha, C. L. Jabr, Lucas Portela Oliveira, J. A. Arioli Filho

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引用次数: 1

Abstract

Abstract Introduction Screw-retained restorations have a screw access hole (SAH) sealed with resin composite aiming at safe-guarding the aesthetic features of the ceramic veneer. The loss or wear of the resin composite applied in sealing the SAH is among the most common complications in implant prosthodontics, as the fracture of ceramic veneer. Objective Evaluate the influence of sealant materials on the fracture resistance of resin composite applied in sealing screw access hole in screwed (SAH) implants. Material and method The samples were produced from UCLA abutments in metallic NiCr alloy with subsequent application of ceramic. After asperisation and conditioning ceramic surface, was applied silane and dentin adhesive, before sealing the conduits with resin composites Z100 and P60. Nine groups (n=10) were evaluated: sealing with Z-100 (ZNC) and P-60 (PNC) without obturation of SAH; sealing with Z100 (ZCP) and P-60 (PCP) with absorbent cotton; Z100 (ZPT) and P60 (PPT) with polytetrafluoroethylene; Z100 (ZGP) and P60 (PGP) with gutta-percha and a cemented ceramic crown (ICS). After the fracture resistance test, the data were analyzed using two-way ANOVA and Tukey HSD tests (p<.05). Result The fracture mode was evaluated by scanning electron microscope. Irrespective of the filling material, the highest mean values of fracture resistance were observed in the sealing with P60 (p=.002). When combined with resins composed of a sealing material, the results obtained were: ZGP: 805.5N/ PGP: 929.5N

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填充材料对密封螺钉检修孔用树脂复合材料抗断裂性能的影响

螺钉保留修复体采用树脂复合材料密封的螺钉访问孔(SAH)，旨在保护陶瓷贴面的美学特征。用于密封SAH的树脂复合材料的丢失或磨损是种植修复中最常见的并发症之一，如陶瓷贴面断裂。目的评价不同密封材料对树脂复合材料用于固定螺钉(SAH)种植体的抗断裂性能的影响。材料与方法采用金属NiCr合金的UCLA基台制备样品，随后应用陶瓷。陶瓷表面经喷淋调理后，涂硅烷和牙本质胶，再用树脂复合材料Z100和P60对管道进行密封。评估9组(n=10):采用Z-100 (ZNC)和P-60 (PNC)不封堵SAH;用吸水棉密封Z100 (ZCP)和P-60 (PCP);Z100 (ZPT)和P60 (PPT)与聚四氟乙烯;Z100 (ZGP)和P60 (PGP)与杜仲胶和胶结陶瓷冠(ICS)。抗折性检验后，采用双因素方差分析和Tukey HSD检验对数据进行分析(p< 0.05)。结果用扫描电镜观察断口形态。无论填充材料如何，在P60的密封中观察到最高的断裂抗力平均值(p= 0.002)。当与树脂组成的密封材料结合时，得到的结果是:ZGP: 805.5N/ PGP: 929.5N

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