Stawarczyk Bogna, Jordan Peter, Schmidlin Patrick R, Roos Malgorzata, Eichberger Marlis, Gernet Wolfgang, Keul Christine
Senior Materials Scientist, Department of Prosthodontics, Dental School, Ludwig-Maximilians-University of Munich, Munich, Germany.
Dentist, Department of Prosthodontics, Dental School, Ludwig-Maximilians-University of Munich, Munich, Germany.
J Prosthet Dent. 2014 Nov;112(5):1278-88. doi: 10.1016/j.prosdent.2014.05.014. Epub 2014 Jun 24.
Polyetheretherketone (PEEK) can be used as a framework material for fixed dental prostheses. However, information about the durable bond to veneering resins is still scarce.
The purpose of this study was to investigate the effect of chemical treatments of PEEK on tensile bond strength (TBS) to veneering resins with special emphasis on surface free energy (SFE) and surface roughness (SR).
Seven-hundred fifty PEEK specimens were fabricated and divided into the following 3 pretreatment groups (n=250/group): etching with sulfuric acid for 60 seconds, etching with piranha acid for 30 seconds, and an unetched control. After pretreatment, SFE was determined by using contact angle measurements and SR with a profilometer (n=10/group). The topography of pretreated PEEK surfaces was examined with scanning electron microscopy. Remaining specimens (n=240 per group) were conditioned with visio.link or Signum PEEK Bond, or were left untreated as the control group. Half of each group was veneered with Sinfony or VITA VM LC (n=40/group), and TBS was measured after storage in distilled water at 37°C for either 24 hours or 60 days. Data were analyzed by 4-way and 1-way ANOVA followed by the Scheffé post hoc test and chi-square test (α=.05).
PEEK specimens etched with sulfuric acid resulted in higher SFE and SR than specimens without pretreatment or etching with piranha acid. Etching with sulfuric acid or piranha acid led to no general recommendations with respect to TBS. Conditioning with visio.link or Signum PEEK Bond significantly increased the TBS (P<.001). PEEK veneered with Sinfony showed significantly higher TBS values than those veneered with VITA VM LC (P<.001).
Sufficient TBS for bonding to veneering resin can only be achieved when additional adhesive materials were applied.
聚醚醚酮（PEEK）可作为固定义齿的基架材料。然而，关于其与饰面树脂的持久粘结的信息仍然匮乏。
本研究的目的是调查PEEK的化学处理对其与饰面树脂的拉伸粘结强度（TBS）的影响，特别关注表面自由能（SFE）和表面粗糙度（SR）。
制作750个PEEK试件，并分为以下3个预处理组（每组n = 250）：用硫酸蚀刻60秒、用王水蚀刻30秒以及未蚀刻的对照组。预处理后，使用接触角测量法测定SFE，并使用轮廓仪测定SR（每组n = 10）。用扫描电子显微镜检查预处理后PEEK表面的形貌。其余试件（每组n = 240）用visio.link或Signum PEEK Bond进行处理，或作为对照组不进行处理。每组的一半用Sinfony或VITA VM LC进行饰面处理（每组n = 40），在37°C蒸馏水中储存24小时或60天后测量TBS。数据通过四因素和单因素方差分析，随后进行Scheffé事后检验和卡方检验（α = 0.05）。
用硫酸蚀刻的PEEK试件比未预处理或用王水蚀刻的试件具有更高的SFE和SR。硫酸或王水蚀刻对于TBS没有一般性的结论。用visio.link或Signum PEEK Bond进行处理显著提高了TBS（P < 0.001）。用Sinfony饰面的PEEK的TBS值显著高于用VITA VM LC饰面的PEEK（P < 0.001）。
只有在使用额外的粘结材料时，才能获得与饰面树脂粘结所需的足够TBS。
