五个经典的NiTi内牙旋转文件的比较凸起强度和金分析
Abayomi Baruwa1, Duarte Marques2, João Caramês3
1Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates; Faculty of Dental Medicine, University of Lisbon, Lisboa, Portugal.
European endodontic journal
|September 25, 2025
概括
- (NiTi) 旋转仪器由于设计和金学而在屈曲阻力上有所不同. ProFile和EndoSequence系统显示出优越的耐药性,而其他系统则耐药性较低,影响了临床性能.
科学领域:
- 牙周内科医院 牙周内科医院 牙周内科医院
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
背景情况:
- - (NiTi) 旋转仪器在内牙科中至关重要.
- 尽管有进步,但机械故障,如曲,仍然是一个问题.
- 了解影响仪器性能的因素对于临床成功至关重要.
研究的目的:
- 为了比较五种NiTi旋转内牙系统的设计特征,金性能和抗性.
- 确定哪些设计和金因素与仪器故障模式相关.
- 提供数据,帮助临床医生选择具有最佳机械性能的仪器.
主要方法:
- 来自五个系统 (ProTaper Next,Mtwo,ProFile,EndoSequence,GT系列X) 的250个NiTi旋转仪器的分析.
- 设计 (显微镜) 和金 (EDS,DSC) 的评估.
- 使用在压力负载下使用通用测试机器测量屈曲阻力.
主要成果:
- ProFile的螺旋数量最高;GT系列X的切削刀片最短.
- 所有系统都显示出接近等原子的NiTi比率;ProTaper Next和GT Series X的转换温度更高.
- ProFile和某些 EndoSequence 仪器显示出明显更大的抗性.
结论:
- 仪器设计特征,缩和金构成显著影响NiTi旋转内牙仪器曲阻力.
- 这些因素对于预测和预防办公室仪器断裂至关重要.
- 进一步的研究可以优化NiTi仪器设计,以提高临床耐用性.
相关概念视频
Mechanical Characteristics of Steel
1.0K
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
1.0K
Bending of Members Made of Several Materials
559
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
559
Stress Concentrations in Circular Shafts
544
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
544


