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Influence of different low-pressure plasma process parameters on shear bond strength between veneering composites and PEEK materials
Dental Materials ( IF 5 ) Pub Date : 2018-06-20 , DOI: 10.1016/j.dental.2018.06.004
Friederike Bötel , Tycho Zimmermann , Mona Sütel , Wolf-Dieter Müller , Andreas Dominik Schwitalla

Objective

The aim of this study was to evaluate the impact of oxygen and argon/oxygen low-pressure plasma on the shear bond strength (SBS) between dental PEEK compounds and veneering composites as a function of plasma process time.

Methods

Of an unfilled PEEK (“Juvora”) and two pigment powder filled PEEK compounds (“DC4420”, “DC4450”), 273 rectangular plates were prepared and polished up to 1200 grit. Afterwards the samples were sandblasted and randomly assigned to five different surface pre-treatment groups (1. No plasma (control); 2. O2 plasma for 3 min; 3. O2 plasma for 35 min; 4. Ar/O2 plasma for 3 min; 5. Ar/O2 plasma for 35 min). Surface roughness and water contact angles were recorded using three samples of each PEEK compound for each of the plasma treatment groups. An adhesive (visio.link, Bredent GmbH & Co KG, Senden, Germany) was applied onto the specimen surfaces and light cured. A mold was used to shape three different veneering composites (a) Vita VM LC, “Vita” (Vita Zahnfabrik, Bad Säckingen, Germany); (b) GC GRADIA, “Gradia” (GC Europe, Leuven, Belgium); (c) GC GRADIA DIRECT Flo, “Gradia Flo” (GC Europe, Leuven, Belgium)) into a cylindrical form on the sample surface before light curing. SBS was measured using a universal testing machine after 24 h of incubation in distilled water at 37 °C.

Results

The two pigment filled PEEK compounds treated with O2 plasma and veneered with Gradia Flo showed the highest SBS values (34.92 ± 6.55 MPa and 34.2 ± 1.87 MPa) followed by the combination of the unfilled PEEK material with Gradia Flo (29.57 ± 3.71 MPa). The SBS values of the samples veneered with Gradia were lower, but not significantly so. The SBS values of the specimens with Vita were for the most part associated with significantly lower results.

Significance

A low-pressure plasma process using oxygen plasma for a duration of 35 min, preceded by sandblasting, seems to be the most effective in increasing shear bond strength between veneering composites and PEEK materials.



中文翻译:

不同低压等离子体工艺参数对饰面复合材料与PEEK材料之间的剪切粘结强度的影响

客观的

这项研究的目的是评估作为等离子体处理时间的函数的氧气和氩气/氧气低压等离子体对牙科PEEK化合物和饰面复合材料之间的剪切粘结强度(SBS)的影响。

方法

在未填充的PEEK(“ Juvora”)和两种填充颜料粉的PEEK化合物(“ DC4420”,“ DC4450”)中,制备了273个矩形板并抛光至1200粗砂。之后,将样品喷砂并随机分配到五个不同的表面预处理组(1.无血浆(对照); 2。O 2血浆3分钟; 3。O 2血浆35分钟; 4。Ar / O 2血浆)持续3分钟; 5。Ar / O 2血浆35分钟)。对于每个等离子体处理组,使用每种PEEK化合物的三个样品记录表面粗糙度和水接触角。将粘合剂(visio.link,Bredent GmbH&Co KG,德国森登)施加到样品表面并进行光固化。使用模具来成型三种不同的饰面复合材料(a)Vita VM LC,“ Vita”(德国BadSäckingen的Vita Zahnfabrik);(b)GC GRADIA,“格拉迪亚”(GC Europe,比利时鲁汶);(c)在光固化之前,将GC GRADIA DIRECT Flo(“ Gradia Flo”(GC Europe,比利时鲁汶,比利时))制成圆柱状。在37°C的蒸馏水中孵育24小时后,使用通用测试仪测量SBS。

结果

用O 2等离子体处理并饰以Gradia Flo饰面的两种填充颜料的PEEK化合物显示出最高的SBS值(34.92±6.55 MPa和34.2±1.87 MPa),随后是未填充的PEEK材料与Gradia Flo的组合(29.57±3.71 MPa)。 。带有Gradia饰面的样品的SBS值较低,但并非如此。Vita标本的SBS值大部分与明显较低的结果有关。

意义

在喷砂处理之前,先使用氧等离子体进行35分钟的低压等离子体处理似乎最有效地提高饰面复合材料和PEEK材料之间的剪切粘结强度。

更新日期:2018-06-20
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