不同低压等离子体工艺参数对贴面复合材料与 PEEK 材料之间的剪切结合强度的影响。

Influence of different low-pressure plasma process parameters on shear bond strength between veneering composites and PEEK materials.

机构信息

Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.

出版信息

Dent Mater. 2018 Sep;34(9):e246-e254. doi: 10.1016/j.dental.2018.06.004. Epub 2018 Jun 20.

DOI:10.1016/j.dental.2018.06.004

PMID:29935768

Abstract

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. O plasma for 3min; 3. O plasma for 35min; 4. Ar/O plasma for 3min; 5. Ar/O plasma for 35min). 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 24h of incubation in distilled water at 37°C.

RESULTS

The two pigment filled PEEK compounds treated with O plasma and veneered with Gradia Flo showed the highest SBS values (34.92±6.55MPa and 34.2±1.87MPa) followed by the combination of the unfilled PEEK material with Gradia Flo (29.57±3.71MPa). 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 35min, preceded by sandblasting, seems to be the most effective in increasing shear bond strength between veneering composites and PEEK materials.

摘要

目的

本研究旨在评估氧和氩/氧低压等离子体对牙科聚醚醚酮（PEEK）化合物与贴面复合材料之间的剪切结合强度（SBS）的影响，其功能取决于等离子体处理时间。

方法

使用未填充的 PEEK（“Juvora”）和两种含颜料粉末的 PEEK 化合物（“DC4420”，“DC4450”）制备了 273 个矩形板，并打磨至 1200 目。然后，对样品进行喷砂处理，并将其随机分配到五个不同的表面预处理组（1.无等离子体（对照）；2.氧等离子体处理 3min；3.氧等离子体处理 35min；4.氩/氧等离子体处理 3min；5.氩/氧等离子体处理 35min）。使用每个等离子体处理组的三个 PEEK 化合物样本记录表面粗糙度和水接触角。将一种胶粘剂（visio.link，Bredent GmbH & Co KG，Senden，德国）涂覆在样品表面并进行光固化。使用模具在样品表面上成型三种不同的贴面复合材料（a）Vita VM LC，“Vita”（Vita Zahnfabrik，Bad Säckingen，德国）；（b）GC GRADIA，“Gradia”（GC Europe，Leuven，比利时）；（c）GC GRADIA DIRECT Flo，“Gradia Flo”（GC Europe，Leuven，比利时）），然后在 37°C 的蒸馏水中孵育 24 小时后进行光固化。使用万能试验机测量剪切结合强度（SBS）。

结果

用氧等离子体处理的两种含颜料的 PEEK 化合物与 Gradia Flo 贴面的 SBS 值最高（34.92±6.55MPa 和 34.2±1.87MPa），其次是与 Gradia Flo 组合的未填充 PEEK 材料（29.57±3.71MPa）。用 Gradia 贴面的样品的 SBS 值较低，但不显著。用 Vita 贴面的样品的 SBS 值大多与显著较低的结果相关。