Abstract：
OBJECTIVE: This study investigates the interaction of zirconia and polyetheretherketone (PEEK) with indirect composite in fixed dental prostheses. This investigation aimed to assess the shear bond strength (SBS) and color stability of zirconia and PEEK before and after aging, addressing critical concerns in dental restorative applications.
METHODS: The current in vitro study used 96 samples, 48 of which were divided into two groups, zirconia and PEEK, before and after thermocycling. A dual-axis chewing simulator was used for thermocycling. SBS was measured using a universal testing machine, and color stability was checked using a reflective spectrophotometer.
METHODS: Ninety-six samples were categorized into zirconia and PEEK groups, each with subgroups undergoing thermocycling. Samples were prepared using computer-aided design/computer-aided manufacturing milling and veneered with composite resin. Thermocycling involved 10,000 cycles, simulating stress levels equivalent to approximately 1 year of clinical use. SBS was assessed using standardized tests. Stereomicroscopic analysis was performed to evaluate the type of failure. Color stability of the core materials with indirect composite was done using a spectrophotometer before and after aging.
METHODS: Statistical analysis included paired t-tests and independent t-tests in SPSS software.
RESULTS: The results revealed that SBS values for composite on PEEK decreased from 13.86 ± 0.164 MPa before thermocycling to 13.46 ± 0.185 MPa after thermocycling, with a significant difference (P < 0.005). However, both pre- and postthermocycling values for PEEK were higher than zirconia. The t-test confirmed the lower bond strength of composite to zirconia, with a noteworthy improvement after aging. Stereomicroscopic images revealed adhesive failure for the zirconia group and mixed (adhesive and cohesive) failure for the PEEK group. ΔE values were 3.21 ± 0.127 and 2.93 ± 0.142 for zirconia and PEEK groups, respectively (P < 0.005).
CONCLUSIONS: Within the limitations of this study, it can be deduced that PEEK is a feasible substitute for zirconia when used in conjunction with indirect composite for the fabrication of dental prostheses.
METHODS: The current in vitro study used 96 samples, 48 of which were divided into two groups, zirconia and PEEK, before and after thermocycling. A dual-axis chewing simulator was used for thermocycling. SBS was measured using a universal testing machine, and color stability was checked using a reflective spectrophotometer.
METHODS: Ninety-six samples were categorized into zirconia and PEEK groups, each with subgroups undergoing thermocycling. Samples were prepared using computer-aided design/computer-aided manufacturing milling and veneered with composite resin. Thermocycling involved 10,000 cycles, simulating stress levels equivalent to approximately 1 year of clinical use. SBS was assessed using standardized tests. Stereomicroscopic analysis was performed to evaluate the type of failure. Color stability of the core materials with indirect composite was done using a spectrophotometer before and after aging.
METHODS: Statistical analysis included paired t-tests and independent t-tests in SPSS software.
RESULTS: The results revealed that SBS values for composite on PEEK decreased from 13.86 ± 0.164 MPa before thermocycling to 13.46 ± 0.185 MPa after thermocycling, with a significant difference (P < 0.005). However, both pre- and postthermocycling values for PEEK were higher than zirconia. The t-test confirmed the lower bond strength of composite to zirconia, with a noteworthy improvement after aging. Stereomicroscopic images revealed adhesive failure for the zirconia group and mixed (adhesive and cohesive) failure for the PEEK group. ΔE values were 3.21 ± 0.127 and 2.93 ± 0.142 for zirconia and PEEK groups, respectively (P < 0.005).
CONCLUSIONS: Within the limitations of this study, it can be deduced that PEEK is a feasible substitute for zirconia when used in conjunction with indirect composite for the fabrication of dental prostheses.
摘要：
目的：本研究调查了氧化锆和聚醚醚酮（PEEK）与间接复合材料在固定假牙中的相互作用。本研究旨在评估氧化锆和PEEK老化前后的剪切粘结强度（SBS）和颜色稳定性，解决牙科修复应用中的关键问题。
方法：目前的体外研究使用了96个样本，其中48人分为两组，氧化锆和PEEK,在热循环之前和之后。双轴咀嚼模拟器用于热循环。使用万能试验机测量SBS，使用反射分光光度计检查颜色稳定性。
方法：将96个样品分为氧化锆和PEEK组，每个小组都有热循环。使用计算机辅助设计/计算机辅助制造研磨制备样品并用复合树脂贴面。热循环涉及10,000次循环，模拟相当于临床使用约1年的应激水平。使用标准化测试评估SBS。进行立体显微镜分析以评估故障类型。在老化之前和之后，使用分光光度计进行具有间接复合材料的核心材料的颜色稳定性。
方法：统计学分析包括SPSS软件中的配对t检验和独立t检验。
结果：结果表明，PEEK上复合材料的SBS值从热循环前的13.86±0.164MPa下降到热循环后的13.46±0.185MPa，具有显著性差异(P<0.005)。然而,PEEK的热循环前值和热循环后值均高于氧化锆。t检验证实复合材料与氧化锆的粘结强度较低，老化后有显著改善。立体显微图像显示氧化锆组的粘合失败和PEEK组的混合（粘合和内聚）失败。氧化锆和PEEK组的ΔE值分别为3.21±0.127和2.93±0.142，分别为(P<0.005)。
结论：在本研究的局限性内，可以推断，当与间接复合材料一起用于制造假牙时，PEEK是氧化锆的可行替代品。
方法：目前的体外研究使用了96个样本，其中48人分为两组，氧化锆和PEEK,在热循环之前和之后。双轴咀嚼模拟器用于热循环。使用万能试验机测量SBS，使用反射分光光度计检查颜色稳定性。
方法：将96个样品分为氧化锆和PEEK组，每个小组都有热循环。使用计算机辅助设计/计算机辅助制造研磨制备样品并用复合树脂贴面。热循环涉及10,000次循环，模拟相当于临床使用约1年的应激水平。使用标准化测试评估SBS。进行立体显微镜分析以评估故障类型。在老化之前和之后，使用分光光度计进行具有间接复合材料的核心材料的颜色稳定性。
方法：统计学分析包括SPSS软件中的配对t检验和独立t检验。
结果：结果表明，PEEK上复合材料的SBS值从热循环前的13.86±0.164MPa下降到热循环后的13.46±0.185MPa，具有显著性差异(P<0.005)。然而,PEEK的热循环前值和热循环后值均高于氧化锆。t检验证实复合材料与氧化锆的粘结强度较低，老化后有显著改善。立体显微图像显示氧化锆组的粘合失败和PEEK组的混合（粘合和内聚）失败。氧化锆和PEEK组的ΔE值分别为3.21±0.127和2.93±0.142，分别为(P<0.005)。
结论：在本研究的局限性内，可以推断，当与间接复合材料一起用于制造假牙时，PEEK是氧化锆的可行替代品。
