在横平面上对清晰对齐器和快速扩展器的机械行为进行比较:一个体外研究
Alessandro Bruni1, Andrea Abate2, Cinzia Maspero3,4
1Surgical, Medical and Dental Department, University of Modena and Reggio Emilia, 41124 Modena, Italy.
Bioengineering (Basel, Switzerland)
|February 23, 2024
概括
快速 palatal 扩展器 (RPE) 提供明显更高的力量比清晰的对齐器,大约十倍大. 强力衰变模式也不同,RPE显示非线性,清晰的对齐器显示线性减少随时间推移.
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:
- 对比牙矯正器具的有效性对于治疗规划至关重要.
- 清晰对齐器和快速部扩展器 (RPE) 代表了部扩张的不同方法.
- 了解这些设备的生物力学输出对于临床应用至关重要.
研究的目的:
- 量化和比较透明调整器和RPE之间的横向负载大小和随时间的力量衰减.
- 在受控的实验室环境中,研究正义牙科器械的力传递特性.
主要方法:
- 从口腔内扫描进行牙大门模型的增材制造.
- 使用带有单轴负载电池的测试机来测量设备的力.
- 记录机械负载和力衰减趋势在一个定义的时间框架内,无论是RPE和清晰对齐器.
主要成果:
- 快速部扩展器 (RPE) 力量在非线性衰变的每次激活范围为30至50N.
- 清晰对齐力在3到5N之间,随着时间的推移呈线性衰变.
- RPE产生的力量大约是透明对齐器的十倍.
结论:
- 快速部扩展器 (RPE) 与清晰对齐器相比,施加的力量要大得多.
- 在这两种设备类型之间,强力衰变模式显著不同.
- 临床适用性需要考虑口腔环境的影响和研究局限性.
相关概念视频
01:14Mechanical Efficiency of Real Machines
The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...
However, in reality, no machine can be truly ideal, and all of them experience some...
01:19Machines
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. One example of a machine is the cutting plier, which is used to cut wires by applying forces to its handles. When equal and opposite forces are exerted on the handles of the cutting plier, they cause the cutting edges to come together and apply equal and opposite reaction forces on the wire, which are greater than the applied forces.
A free-body diagram of the...
A free-body diagram of the...