Results: compared with control group, the fracture resistance in the experimental groups were lower.
结果：各实验组抗折能力均低于对照组。
PURPOSE: To study the effect of ion-exchange treatment on the fracture resistance of hot pressable ceramic crown.
目的：研究国产陶瓷表面离子交换处理对热压铸瓷冠抗碎裂载荷的影响。
Objective To compare the fracture resistance and fracture modes of teeth restored with four diferent post-and-core systems.
比较纤维桩核系统和金属铸造桩核系统修复后牙体组织的抗折裂强度和折裂模式。
Objective: to observe the effects of different root canal file and the restoration of occlusal surface on the fracture resistance of premolars.
目的：观察不同根管锉预备根管及不同面充填物对前磨牙牙体抗折强度的影响。
Objective To compare the fracture resistance and failure modes of endodontically treated human upper premolars restored with different postcore systems.
目的比较不同桩修复离体牙对修复体整体抗折强度的影响。
To evaluate the effects of the different amount of residual tooth on the fracture resistance ability of lower premolars restored with fiber quartz-fiber post-core and full crown.
评价不同牙体剩余量对石英纤维桩复合树脂核全冠修复下颌前磨牙抗折性能的影响。
Objective:The purpose of this study was to investigate the effect of different types of pontic lingual metal framework in posterior metal-ceramic fixed bridge on the fracture resistance of porcelain.
目的：比较后牙烤瓷桥桥体舌侧金属支架结构改良对于瓷抗折强度的影响。
The anatomical distribution of cortical and cancellous bone in the femoral neck may be critical in determining resistance to fracture .
股骨颈中皮质骨和松质骨的解剖分布情况决定了其抗骨折的能力。
The material fracture toughness was adequate to ensure development of the full fatigue resistance of the weld detail.
材料的断裂韧性可充分满足焊缝细节疲劳抗力的发挥。
From the view point of material selection, we analyzed their dynamic fracture toughness and crack propagation resistance.
从选材角度对比分析了几种铝合金的动态断裂韧性及裂纹扩展阻力。
Two types of load were applied to investigate the change of tooth fracture resistance after restored with MOD inlay.
目的：对直接树脂和间接树脂嵌体修复后牙体的抗力进行三维有限元研究。
The subsection excision sequence determined according to these principles and methods can improve the punch's resistance to fracture.
按照这些原则与方法确定分段切除顺序时可提高凸模的抗折断能力。
Fracture toughness of X70 pipeline steel was tested with the method of resistance curve of energy value J.
采用阻力曲线法测定了X70管线钢的断裂韧度。
An energy method for determining fracture toughness of fibrous composite laminates was based on the theory of elastic energy release rate and crack-growth resistance in this paper.
应用线弹性断裂力学的弹性能释放率及裂纹扩展阻力等基本概念和理论，建立起确定纤维增强高分子聚合物复合材料断裂韧性的能量方法。
It is one of surface strengthening technology which is used to improve the resistance of fatigue fracture and stress corrosion cracking of metalic parts and components.
它是用来改善金属零构件疲劳和应力腐蚀断裂抗力的一种表面强化工艺。
The influence of fracture mode and wear surface pullout on wear resistance was studied.
研究了断裂方式对磨损表面剥落和耐磨性的影响。
The results show that nitrogen has remarkable influences on rolling contact fatigue life and plain strain fracture toughness, and little influences on wear resistance.
结果表明，含氮量对滚动接触疲劳寿命及平面应变断裂韧性具有很显著的影响，而对耐磨性影响很小。
Evaluation of fracture toughness of the alloy steel by the JR resistance curve shows the influence of heat treatment technology.
应用所得JR阻力曲线对合金钢的断裂韧度的评定表明了热处理工艺的影响。
The structure morphology the hardness and wear resistance of composite have been investigated, and fracture model of the composites has been analyzed.
考察了复合材料的组织形貌，检测了复合材料的硬度和耐磨性，分析了复合材料的断裂模式。
The results show that main cause of conchoidal fracture forming is that composition segregation in solidification grain boundary of casting steel reduces the resistance of crack propagation.
结果表明，沿一次晶晶界的成分偏析对裂纹扩展阻力的降低作用是铸钢中贝壳状断口形成的主要原因。
Whether we can correctly understand the frictional resistance characteristics of the modified dry fracturing fluid or not would influence the fracture technology's effective implementation.
对改良的干法压裂液这种非牛顿流体的摩擦阻力特性的正确认识，关系着干法压裂技术的有效实施。
The scab and the fracture defect in VTi abrasion resistance cast iron sheathing board are the Key factors that influence its quality.
钒钛抗磨铸铁衬板的夹砂、断裂缺陷是影响质量的关键因素。
Objective To compare the resistance to fracture of the root canals after instrumentation or not.
目的比较预备与不预备的根管以及预备后充填与不充填的根管抗折力。
The melt index (MI), heat distorsion temperature (HDT), solvent resistance, thermal stability, mechanical properties and fracture morphologies were presented.
并对其熔融指数(MI)、热变形温度(HDT)、抗溶剂性、热稳定性、力学性能和破坏形态进行了研究。
In addition, the difference between traditional and multi-structural cemented tungsten carbide is investigated, and so are the mechanisms of abrasion resistance and fracture toughness of the latter.
另外研究了传统硬质合金与多级结构硬质合金的区别及多级结构复合材料的耐磨机理和韧性机理。
On wire - rod mill, the guide shoe is key spare parts to which, excellent wear - resistance, fracture - resistance, dead burning resistance and hot shock resistance are required.
导板是线材轧机上的关键备件，要求有优良的耐磨性、抗断裂性、抗粘钢性和热冲击抗力。
On wire - rod mill, the guide shoe is key spare parts to which, excellent wear - resistance, fracture - resistance, dead burning resistance and hot shock resistance are required.
导板是线材轧机上的关键备件，要求有优良的耐磨性、抗断裂性、抗粘钢性和热冲击抗力。
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