相关实验视频
Updated: Jan 23, 2026

07:17
Studying Orthodontic Tooth Movement in Mice
Published on: August 2, 2024
1.5K
一项对患者的垂直和横向正牙复发的比较研究,有和没有唇裂和 palatal
Navia Jose Paul1, Annapurna Kannan1, Vignesh Kailasam1
1Department of Orthodontics and Dentofacial Orthopedics, Sri Ramachandra Dental College & Hospital, Sri Ramachandra Institute of Higher Education and Research (DU), Porur, Chennai, India.
概括
与非裂口 (NC) 患者相比,带有裂口口唇 (CLP) 的正牙患者在治疗后经历了更显著的垂直和横向复发. 这凸显了在CLP患者中需要专门的保留策略的需要.
科学领域:
- 矯正牙科 矯正牙科是一種矯正牙科.
- 头骨面部异常 头骨面部异常
- 牙科公共卫生 牙科公共卫生
背景情况:
- ортодонтическое治疗的目的是纠正牙和骨的差异.
- 维持治疗后的稳定性对于长期成功至关重要.
- 患有非综合症口唇裂 (CLP) 的患者对正牙稳定性提出了独特的挑战.
研究的目的:
- 为了比较治疗后2年的垂直和横向维度的稳定性,在CLP与非裂 (NC) 控制对照的 ортодонтика患者中.
- 为了确定CLP和NC组之间复发模式的差异.
主要方法:
- 对28名年龄和性别匹配的患者 (14名CLP,14名NC) 进行了回顾性比较研究.
- ортодонтика固定器械治疗,然后是可拆卸的真空形成的保持器.
- 通过横向脑图评估垂直变化;使用修改的哈达特-博登汉姆 (MHB) 指数分析横向关系.
主要成果:
- 在CLP组中,治疗后2年,前面的面部高度和横向尺寸 (切口,牙) 显著减少.
- 在CLP患者的特定垂直变化包括前面面部高度,U1-NF,L1-MP和U6-NF的减少.
- 在CLP患者中,横向复发明显出现在切口,牙和整体MHB得分上,与微小变化的NC组不同.
结论:
- 与非裂口患者相比,患有CLP的患者在治疗后2年呈现出更大的垂直和横向正牙复发.
- 这些发现表明需要根据CLP患者的解剖学和生理学特征量身定制的永久保留协议.
- 增强的保留策略可能是必要的,以实现长期稳定在CLP个体.
相关概念视频
Speed of a Transverse Wave
3.9K
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
One of the key properties of any wave is the wave speed. Light...
3.9K
Vertical Curve: Problem Solving
474
Vertical curves provide the transition between two roadway grades, ensuring safety, comfort, and functionality. Calculating elevations at specific stations along the curve involves several systematic steps based on the curve's geometry and provided design parameters.The vertical curve is defined by its length, grades, Point of Vertical Intersection (P.V.I.) location, and P.V.I. elevation. The stations of the Point of Vertical Curvature (P.V.C.), where the curve begins, and the Point of Vertical...
474
Deformations in a Transverse Cross Section
605
When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
605
Introduction to Vertical Curves
569
Vertical curves are parabolic transitions that connect different grades on highways and railroads, ensuring a smooth alignment between back and forward tangents. The back tangent represents the initial grade, while the forward tangent defines the subsequent grade. These curves can be symmetrical, with equal tangent lengths, or nonsymmetrical, with varying lengths. The key points defining a vertical curve include the Point of Vertical Intersection (P.V.I.), where the tangents meet; the Point of...
569
Deformation of a Beam under Transverse Loading
739
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
The insights from the bending moment diagram extend to...
739
Elevation of Intermediate Points on Vertical Curves
280
Vertical curves are essential in roadway design because they provide smooth transitions between varying roadway grades. Designing vertical curves involves calculating intermediate elevations and identifying the curve's highest or lowest point, which is essential for optimal roadway performance.Intermediate elevations on a vertical curve are determined using the tangent offset method. This method considers the initial elevation at the start of the curve, the grades, and the curve's geometry. The...
280

