在自我结合的语言括号中对扭矩矩的评估
Shingo Mineta1, Akira Nakajima1, Eiji Tanaka2
1Department of Orthodontics, Nihon University School of Dentistry.
Dental materials journal
|December 4, 2024
概括
这项研究发现,语言支架槽形状和线材在正牙治疗中显著影响第三阶段曲时刻. AL支架比CL和ST支架产生更多的扭矩,根据线材类型的变化.
科学领域:
- 矯正牙科 矯正牙科是一種矯正牙科.
- 生物材料科学 生物材料科学
- 牙科机械 牙科机械
背景情况:
- 语言正牙包括将支架放在牙的舌头侧.
- 第三级曲 (扭矩) 对于控制牙的旋转和角度至关重要.
- 了解支架-电线相互作用对于可预测的正牙结果至关重要.
研究的目的:
- 量化和比较由不同的lingual支架槽形状在第三阶曲线下产生的扭矩时刻.
- 为了评估各种线材对语言器件扭矩表达的影响.
- 提供指导语言括号和线缆选择的数据,以实现最佳扭矩控制.
主要方法:
- 测试了三种类型的具有不同的插槽尺寸 (0.018×0.018英寸方形,0.018×0.025英寸) 的自结合语言括号.
- 在支架槽模拟中使用了由三种不同材料组成的电线.
- 扭矩值使用校准扭矩计在各种激活角度精确测量.
主要成果:
- 与CL和ST支架相比,0.018×0.018英寸的方形槽AL支架产生了明显更高的扭矩时刻.
- 对于方形电线,CL支架表现出最低的扭矩矩;然而,它产生的扭矩比ST支架与矩形电线更大.
- - (Ti-Ni) 线总是导致支架类型中最小的扭矩时刻.
结论:
- 语言支架槽的几何是第三阶曲激活过程中扭矩表达的关键决定因素.
- 电线材料的特性,特别是矩形配置,影响扭矩产生以及支架设计.
- 临床医生应仔细考虑语言支架槽形状和线材,在应用第三阶曲线时,以实现精确的正统牙运动.
相关概念视频
Net Torque Calculations
9.0K
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
9.0K
Bending and Torsional Moments
3.5K
Bending and torsional moments are two fundamental concepts in structural engineering. They play an important role in understanding the behavior of materials and structures under different loading conditions.
The reaction developed in a structural element when subjected to an external force causes the element to bend. When a structural element bends upwards, it creates compressive normal forces on the top and tensile normal forces on the bottom, resulting in a couple that determines the bending...
The reaction developed in a structural element when subjected to an external force causes the element to bend. When a structural element bends upwards, it creates compressive normal forces on the top and tensile normal forces on the bottom, resulting in a couple that determines the bending...
3.5K
Screw: Problem Solving
395
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
To evaluate the...
395
Principle of Moments: Problem Solving
816
The principle of moments is a fundamental concept in physics and engineering. It refers to the balancing of forces and moments around a point or axis, also known as the pivot. This principle is used in many real-life scenarios, including construction, sports, and daily activities like opening doors and pushing objects.
One such scenario involves a pole placed in a three-dimensional system with a cable attached. When a tension is applied to the cable, the moment about the z-axis passing through...
One such scenario involves a pole placed in a three-dimensional system with a cable attached. When a tension is applied to the cable, the moment about the z-axis passing through...
816
Resultant Moment: Scalar Formulation
1.4K
When multiple forces act on an object in two-dimensional space, the concept of the net moment can be used to understand the tendency of these forces to induce rotational motion about a fixed point. The scalar formulation of the resultant moment is a helpful tool in analyzing the equilibrium of structures subjected to multiple forces.
To determine the resultant moment, the moments caused by all the forces in a system in the x-y plane are considered. Positive moments are typically...
To determine the resultant moment, the moments caused by all the forces in a system in the x-y plane are considered. Positive moments are typically...
1.4K
Bearings: Problem Solving
272
Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...
272


