Stawarczyk Bogna, Thrun Hadelinde, Eichberger Marlis, Roos Malgorzata, Edelhoff Daniel, Schweiger Josef, Schmidlin Patrick R
Senior Materials Scientist, Department of Prosthodontics, Dental School, Ludwig-Maximilians University Munich, Munich, Germany.
Dentist, Department of Prosthodontics, Dental School, Ludwig-Maximilians University Munich, Munich, Germany.
J Prosthet Dent. 2015 Nov;114(5):666-73. doi: 10.1016/j.prosdent.2015.06.006. Epub 2015 Sep 4.
Polyetheretherketone (PEEK) can be used as a framework material for fixed dental prostheses (FDPs). However, information about the fracture load of veneered PEEK FDPs is still scarce.
The purpose of this in vitro study was to investigate the influence of different PEEK surface pretreatments and adhesive systems on the fracture load of 2 differently veneered FDPs.
Four hundred eighty anatomically shaped 3-unit PEEK frameworks were milled, airborne-particle abraded with 50 μm alumina powder, and divided into 4 groups according to the following surface pretreatment (n=120): plasma treatment, etching with either sulfuric acid or piranha solution, and no further treatment. All groups were then allocated to 4 conditioning groups: visio.link, Ambarino P60, Signum PEEK Bond, or no conditioning. They were veneered with Signum Composite (n=15) or Signum Ceramis (n=15). Upon completion, the FDPs were thermally aged, and fracture loads and failure types were determined. Statistical analysis was performed with 3/2/1-way ANOVA with the post hoc Tukey HSD test (α=.05).
The highest fracture loads were achieved without treatment in combination with visio.link (737 ±138 N). The lowest values were obtained after piranha acid etching and conditioning with visio.link (277 ±71 N); both groups were veneered with Signum Composite. The results, however, indicated no clear influence of either pretreatment or conditioning. With few exceptions, FDPs veneered with Signum Composite showed higher fracture load values compared to Signum Ceramis. After thermocycling, all FDPs showed cracks in the veneering composite resin material in the pontic region, regardless of the PEEK pretreatment or the adhesive system used. After loading, no fractures of the PEEK frameworks were evident in any FDPs, but chipping of the veneering material was observed.
With respect to the fracture types after thermocycling, pretreatment, conditioning, or veneering resin cement did not affect the fracture results.
聚醚醚酮（PEEK）可作为固定义齿（FDP）的基托材料。然而，关于烤瓷PEEK FDP的断裂载荷的信息仍然很少。
本体外研究的目的是调查不同的PEEK表面预处理和粘接系统对两种不同烤瓷FDP的断裂载荷的影响。
制作480个解剖形态的3单位PEEK基托，用50μm氧化铝粉末进行空气颗粒研磨，然后根据以下表面预处理分为4组（n = 120）：等离子体处理、用硫酸或过硫酸溶液蚀刻，以及不进行进一步处理。然后将所有组再分为4个处理组：visio.link、Ambarino P60、Signum PEEK Bond，或不进行处理。它们分别用Signum Composite（n = 15）或Signum Ceramis（n = 15）进行烤瓷。完成后，对FDP进行热老化处理，并测定断裂载荷和失效类型。采用3/2/1因素方差分析和事后Tukey HSD检验进行统计分析（α = 0.05）。
未经处理联合visio.link处理的FDP获得了最高的断裂载荷（737±138 N）。过硫酸蚀刻并采用visio.link处理后获得了最低值（277±71 N）；这两组均用Signum Composite进行烤瓷。然而，结果表明预处理或处理均无明显影响。除少数例外，与Signum Ceramis相比，用Signum Composite烤瓷的FDP显示出更高的断裂载荷值。热循环后，无论PEEK预处理或使用的粘接系统如何，所有FDP在桥体区域的烤瓷复合树脂材料中均出现裂纹。加载后，任何FDP中均未发现PEEK基托断裂，但观察到烤瓷材料有崩瓷现象。
关于热循环后的断裂类型，预处理、处理或烤瓷树脂水门汀均不影响断裂结果。
