Taufall Simon, Eichberger Marlis, Schmidlin Patrick R, Stawarczyk Bogna
Department of Prosthodontics, Dental School, Ludwig-Maximilians-University Munich, Goethestrasse 70, 80336, Munich, Germany.
Clinic of Preventive Dentistry, Periodontology and Cariology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
Clin Oral Investig. 2016 Dec;20(9):2493-2500. doi: 10.1007/s00784-016-1777-4. Epub 2016 Mar 15.
The aim of this study is to investigate the fracture load of different veneered PEEK 3-unit fixed dental prosthesis (FDPs) after different aging regimens.
Congruently anatomically shaped 3-unit FDPs were milled using a master stl-data set and randomly divided into four groups (N = 120, n = 30 per veneering group), which were veneered using different veneering methods: (i) digital veneering with breCAM.HIPC, (ii) conventional veneering with crea.lign, (iii) conventional with crea.lign paste, and (iv) using pre-manufactured veneers visio.lign. The FDPs were then adhesively cemented on a metal abutment and fracture loads were measured in a universal testing machine (1 mm/min) before and after aging (10,000 thermal cycles, 5/55 °C). Two- and one-way ANOVA followed by post hoc Scheffé tests were used for data analysis (p < 0.05).
This investigation showed an influence of the veneering method on the fracture load results independent of the aging level. The highest fracture load was measured for the FDPs with digital veneering (1882 ± 152 N at baseline, 2021 ± 184 N after thermocycling). The remaining groups showed comparable results, and no impact of thermal aging was observed. Digital and conventional veneers showed cracks in the pontic region starting from the connector area as a main failure type after loading, while the pre-manufactured veneers showed predominantly adhesive failures.
The digital veneering method showed the highest fracture load resistance. Thermal aging showed no impact on the fracture load of all tested veneered PEEK 3-unit FDPs.
According to this study results, reliable veneering of PEEK FDPs can be achieved with digital veneering.
本研究旨在调查不同老化方案后不同贴面聚醚醚酮（PEEK）三单位固定义齿（FDP）的断裂载荷。
使用主stl数据集铣削出形状一致的解剖形态三单位FDP，并随机分为四组（N = 120，每组贴面组n = 30），采用不同的贴面方法进行贴面：（i）使用breCAM.HIPC进行数字贴面，（ii）使用crea.lign进行传统贴面，（iii）使用crea.lign糊剂进行传统贴面，（iv）使用预制贴面visio.lign。然后将FDP粘结在金属基台上，并在老化（10,000次热循环，5/55°C）前后在万能试验机中以1毫米/分钟的速度测量断裂载荷。采用双向和单向方差分析以及事后Scheffé检验进行数据分析（p < 0.05）。
本研究表明，贴面方法对断裂载荷结果有影响，且与老化程度无关。数字贴面的FDP测得的断裂载荷最高（基线时为1882±152 N，热循环后为2021±184 N）。其余组结果相当，未观察到热老化的影响。数字贴面和传统贴面在加载后，桥体区域从连接区域开始出现裂缝，这是主要的失效类型，而预制贴面主要表现为粘结失效。
数字贴面方法显示出最高的抗断裂载荷能力。热老化对所有测试的贴面PEEK三单位FDP的断裂载荷没有影响。
根据本研究结果，数字贴面可实现PEEK FDP的可靠贴面。
