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首页> 外文期刊>The Journal of Prosthetic Dentistry >Shear bond strength of resin cements to both ceramic and dentin.
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Shear bond strength of resin cements to both ceramic and dentin.

机译：树脂水泥对陶瓷和牙本质的剪切粘结强度。

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Statement of Problem. All ceramic restorations benefit from resin cement bonding to the tooth. However, the literature is unclear on which cement, ceramic conditioning treatment, and dentin bonding agent produce the highest and longest-lasting bond strength. Purpose. This in vitro study evaluated immediate and 6-month shear bond strengths between a feldspathic ceramic and 4 different resin cements with the use of 6 different surface-conditioning treatments. Shear bond strengths between the 4 resin cements and dentin also were measured. Material and Methods. Four hundred eighty discs (10 mm in diameter and 4 mm thick) of Ceramco II porcelain were randomly divided into 6 main groups (n = 80). The ceramic specimens received 6 different surface conditioning treatments before the application of resin cement. These surface treatments were sanding with 600-grit silicon carbide paper, microetching with aluminum oxide, sanding followed by silane application, microetching followed by silane application, hydrofluoric acid-etching, and hydrofluoric acid-etching followed by silane application. Each group then was subdivided into 4 subgroups (n = 20) for the application of 1 of 4 cements: Nexus, Panavia 21, RelyX ARC, and Calibra. All cemented specimens were tested under shear loading until fracture on a universal testing machine; the load at fracture was reported in MPa as the bond strength. Bond strengths were determined at 24 hours and after 6 months of specimen storage in a saline solution. For dentin-resin cement shear bond strength testing, dentin specimens were treated with dentin bonding agents, and a thin layer of resin cement was applied according to the manufacturer's directions. Prodigy composite was bonded to the cement. Shear bond strengths were determined as above and reported in MPa at fracture. Data were analyzed with 3-way analysis of variance (P<.01). Results. Hydrofluoric acid-etching followed by silane application produced bond strengths (15.0 +/- 7.4 to 21.8 +/- 5.8 MPa) in the highest statistical group with all 4 cements at both 24 hours and 6 months (P<.01). Sanding with 600-grit silicon carbide paper and microetching with aluminum oxide produced the lowest bond strengths (0.0 to 4.0 +/- 3.5 MPa). At 24 hours and 6 months, there were no significant differences among the 4 cements when hydrofluoric acid-etching was followed by silane application. Both auto- and light-polymerized dentin bonding agents bonded better to dentin than dual-polymerized bonding agents. Conclusion. Within the limitations of this study, hydrofluoric acid-etching followed by silane application produced the best bonds at 24 hours and 6 months with all 4 cements. Auto- and light-polymerized adhesives were associated with higher bond strengths to dentin than dual-polymerized adhesives.
机译：问题陈述。所有陶瓷修复体均受益于树脂胶与牙齿的粘结。然而，文献尚不清楚哪种水泥，陶瓷调理处理剂和牙本质粘合剂能产生最高和最长的粘合强度。目的。这项体外研究通过使用6种不同的表面处理方法评估了长石质陶瓷与4种不同树脂水泥之间的即时和6个月剪切粘结强度。还测量了4种树脂胶粘剂和牙本质之间的剪切粘结强度。材料与方法。 480块Ceramco II瓷片（直径10毫米，厚4毫米）被随机分为6个主要组（n = 80）。在使用树脂水泥之前，陶瓷样品接受了6种不同的表面处理。这些表面处理包括：用600粒度的碳化硅纸打磨，用氧化铝微蚀刻，先打磨然后进行硅烷涂敷，先进行微蚀刻然后进行硅烷涂敷，氢氟酸蚀刻和氢氟酸蚀刻然后进行硅烷涂敷。然后将每组细分为4个子组（n = 20），以应用4种胶合剂中的1种：Nexus，Panavia 21，RelyX ARC和Calibra。所有胶合试样均在剪切载荷下进行测试，直到在通用测试机上断裂为止。断裂载荷以MPa表示，为粘结强度。在24小时和在盐溶液中保存6个月后测定粘合强度。对于牙本质-树脂水泥的剪切粘结强度测试，用牙本质粘合剂处理牙本质样品，并根据制造商的指示涂上一层薄的树脂骨水泥。 Prodigy复合材料粘结到水泥上。剪切粘结强度如上所述确定，并以MPa表示。数据用方差的三向分析（P <.01）进行分析。结果。氢氟酸蚀刻后再加硅烷可在24小时和6个月内所有4种胶结物的最高统计组中产生粘结强度（15.0 +/- 7.4至21.8 +/- 5.8 MPa）（P <.01）。用600粒度的碳化硅纸打磨和用氧化铝微蚀刻产生的粘结强度最低（0.0到4.0 +/- 3.5 MPa）。在24小时零6个月时，在进行氢氟酸蚀刻后再施加硅烷，这4种水泥之间没有显着差异。自聚合和轻聚合的牙本质粘合剂均比双聚合的粘合剂更好地与牙本质粘合。结论。在本研究的范围内，氢氟酸蚀刻后再加硅烷可在所有4种胶粘剂的24小时和6个月内产生最佳粘合。与双聚合粘合剂相比，自聚合和轻聚合粘合剂与牙本质的粘合强度更高。

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