Abstract：
OBJECTIVE: Due to the dynamic character of the stomatognathic system, fatigue life experiments simulating the cyclic loading experienced by implant-supported restorations are critical consideration. The aim of this study was to examine the effect of different crown and abutment materials on fatigue failure of single implant-supported crowns.
METHODS: Models were created for 10 different designs of implant-supported single crowns including two zirconia-reinforced lithium silicates (crystallized and precrystallized), monolithic lithium disilicate, polymer-infiltrated ceramic networks, and polyetheretherketone supported by zirconia and titanium abutments. A cyclic load of 179 N with a frequency of 1 Hz was applied on palatal cusp of a maxillary first premolar at a 30° angle in a buccolingual direction.
RESULTS: In the models with titanium abutments, the polymer-infiltrated ceramic network model had a lower number of cycles to fatigue failure values in the implant (5.07), abutment (2.30), and screw (1.07) compared to others. In the models with zirconia abutments, the crystallized zirconia-reinforced lithium silicate model had a higher number of cycles to fatigue failure values in the abutment (8.52) compared to others. Depending on the fatigue criteria, polyetheretherketone implant crown could fail in less than five year while the other implant crowns exhibits an infinite life on all models.
CONCLUSIONS: The type of abutment material had an effect on the number of cycles to fatigue failure values for implants, abutments, and screws, but had no effect on crown materials. The zirconia abutment proved longer fatigue lifetime, and should thus be considered for implant-supported single crowns.
METHODS: Models were created for 10 different designs of implant-supported single crowns including two zirconia-reinforced lithium silicates (crystallized and precrystallized), monolithic lithium disilicate, polymer-infiltrated ceramic networks, and polyetheretherketone supported by zirconia and titanium abutments. A cyclic load of 179 N with a frequency of 1 Hz was applied on palatal cusp of a maxillary first premolar at a 30° angle in a buccolingual direction.
RESULTS: In the models with titanium abutments, the polymer-infiltrated ceramic network model had a lower number of cycles to fatigue failure values in the implant (5.07), abutment (2.30), and screw (1.07) compared to others. In the models with zirconia abutments, the crystallized zirconia-reinforced lithium silicate model had a higher number of cycles to fatigue failure values in the abutment (8.52) compared to others. Depending on the fatigue criteria, polyetheretherketone implant crown could fail in less than five year while the other implant crowns exhibits an infinite life on all models.
CONCLUSIONS: The type of abutment material had an effect on the number of cycles to fatigue failure values for implants, abutments, and screws, but had no effect on crown materials. The zirconia abutment proved longer fatigue lifetime, and should thus be considered for implant-supported single crowns.
摘要：
目的：由于口颌系统的动态特性，模拟植入物支撑修复体所经历的循环载荷的疲劳寿命实验是至关重要的考虑因素。这项研究的目的是研究不同的冠和基台材料对单种植体支撑冠疲劳失效的影响。
方法：为10种不同的植入物支撑单冠设计创建了模型，其中包括两种氧化锆增强的硅酸锂（结晶和预结晶），整体式焦硅酸锂，聚合物渗透陶瓷网，和由氧化锆和钛基台支撑的聚醚醚酮。在颊舌方向上以30°角在上颌第一前磨牙的pal尖上施加179N的循环载荷，频率为1Hz。
结果：在带有钛基台的模型中，聚合物渗透的陶瓷网络模型对植入物中的疲劳破坏值具有较低的循环数(5.07)，桥台(2.30),和螺丝（1.07）相比，其他人。在带有氧化锆基台的模型中，与其他模型相比，结晶氧化锆增强的硅酸锂模型对基台疲劳破坏值的循环次数更高（8.52）。根据疲劳标准，聚醚醚酮种植体冠可能在不到五年的时间内失效，而其他种植体冠在所有模型上都表现出无限的寿命。
结论：基台材料的类型对植入物的疲劳破坏值的循环次数有影响，基台,和螺丝，但对皇冠材料没有影响。氧化锆基台证明了更长的疲劳寿命，因此，应考虑用于植入物支撑的单冠。
方法：为10种不同的植入物支撑单冠设计创建了模型，其中包括两种氧化锆增强的硅酸锂（结晶和预结晶），整体式焦硅酸锂，聚合物渗透陶瓷网，和由氧化锆和钛基台支撑的聚醚醚酮。在颊舌方向上以30°角在上颌第一前磨牙的pal尖上施加179N的循环载荷，频率为1Hz。
结果：在带有钛基台的模型中，聚合物渗透的陶瓷网络模型对植入物中的疲劳破坏值具有较低的循环数(5.07)，桥台(2.30),和螺丝（1.07）相比，其他人。在带有氧化锆基台的模型中，与其他模型相比，结晶氧化锆增强的硅酸锂模型对基台疲劳破坏值的循环次数更高（8.52）。根据疲劳标准，聚醚醚酮种植体冠可能在不到五年的时间内失效，而其他种植体冠在所有模型上都表现出无限的寿命。
结论：基台材料的类型对植入物的疲劳破坏值的循环次数有影响，基台,和螺丝，但对皇冠材料没有影响。氧化锆基台证明了更长的疲劳寿命，因此，应考虑用于植入物支撑的单冠。
