通过不同槽深的被动自结括号对扭矩表达的比较:一个体外试验研究
Patrick Cavallini Saraiva1, Murilo Henrique Cruz1, Igor Studart Medeiros2
1Department of Orthodontics, Faculty of Dentistry, University of São Paulo, São Paulo, Brazil.
International orthodontics
|March 13, 2024
概括
具有0.022英寸x0.026英寸槽深的被动自结合支架显示出更大的弧线/槽玩法. 更深的0.028英寸插槽支架提供了显著更高的扭矩表达,弧线扭矩为24°和36°.
科学领域:
- 矯正牙科 矯正牙科是一種矯正牙科.
- 生物材料工程 生物材料工程
- 牙科机械 牙科机械
背景情况:
- 自结合式支架在正牙科中被广泛使用.
- 了解支架-弧线相互作用对于有效的扭矩控制至关重要.
- 被动自结合支架提供独特的生物力学特性.
研究的目的:
- 为了评估0.019"×0.025"不钢弧线和两个被动自结合支架槽深度 (0.028"与0.026") 之间的相互作用.
- 测量线/槽的发挥,并比较在不同线扭矩下扭矩表达.
- 为了评估槽深对扭矩控制在正牙治疗的影响.
主要方法:
- 使用通用测试机器进行实验设置.
- 对0.028′′和0.026′′槽深度括号进行了扭矩表达的测量.
- 统计分析包括ANOVA和Tukey的测试来比较组.
主要成果:
- 与0.028"槽深括号相比,0.026"槽深括号表现出明显更大的弧线/槽玩法.
- 在0.028"槽深支架中,在24°和36°弧线扭转时观察到更高的扭矩表达.
- 在两个槽深之间,在扭矩控制方面注意到了统计学上显著的差异.
结论:
- 与0.022"×0.028"支架与0.019"×0.025"弧线支架相比,0.022"×0.026"的被动自支架没有提供优越的扭矩控制.
- 支架槽深度显著影响弧线发挥和扭矩表达.
- 临床影响表明,支架槽深度是实现所需的正统牙牙运动的关键因素.
相关概念视频
Screw: Problem Solving
415
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...
415
Frictional Forces on Screws
1.2K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.2K
Self-Locking Screw
1.6K
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
1.6K
Thin-Walled Hollow Shafts
187
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
187
Machines: Problem Solving I
320
A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
320
Net Torque Calculations
9.1K
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...
9.1K


