在高骨切除过程中,至少对中性对齐进行校正,足以减少膝关节引时刻
Kee Soo Kang1, Na-Kyoung Lee2, Kyoung Min Lee1,3
1Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea.
Scientific reports
|April 3, 2025
概括
高骨切除术 (HTO) 应该纠正大腿膝关节对齐到中性. 在HTO中超值校正不会在步行过程中进一步降低膝盖引矩 (KAM).
科学领域:
- 整形外科手术 整形外科手术
- 生物力学 生物力学
- 步态分析 步态分析
背景情况:
- 高骨切除术 (HTO) 传统上过度纠正了 varus 膝关节对齐到一个 valgus 状态.
- 在HTO中Valgus过度纠正可能导致关节线异常和链骨折等并发症.
- 缺乏避免HTO过度校正的生物力学基础.
研究的目的:
- 为了研究膝关节附加时刻 (KAM) 与膝关节骨关节炎中的静态对齐参数之间的关联.
- 通过分析步态和对齐数据,确定HTO的动态最佳目标.
主要方法:
- 使用三维步行分析来测量步行期间的KAM.
- 使用站立全肢前后部放射图来测量机械骨角 (mTFA).
- 根据对齐,患者被分为1°间隔的组,以比较KAM值.
主要成果:
- 低 extremities 与 3 度至 8 度的 varus 对齐展现出更大的 KAM 与那些 0 度至 5 度的 valgus.
- 在0°到5°的关节对齐组内没有观察到KAM的显著差异.
- 瓦鲁斯对齐校正至中性是必要的,但瓦尔古斯过度校正并没有进一步降低KAM.
结论:
- 关节骨关节炎的HTO应该以中性对齐为目标,而不是关节过度纠正.
- 将瓦鲁斯对齐调整为中性足以减少KAM.
- 在HTO中避免valgus过度纠正可能会防止相关的并发症,而不会影响生物机械效益.
相关概念视频
Unsymmetric Bending - Angle of Neutral Axis
256
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
256
Unsymmetric Bending
291
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
291
Plastic Deformations of Members with a Single Plane of Symmetry
85
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
85
Bending of Curved Members - Neutral Surface
166
In curved beams, unlike straight beams, the stress distribution across the cross-section is not uniform due to the beam's curvature. This non-uniformity arises because the neutral axis, where stress is zero, does not align with the centroid of the section. In a curved beam, the strain varies along the section as a function of the distance from the neutral axis.
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within...
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within...
166
General Case of Eccentric Axial Loading
162
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
162
Stability of structures
148
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
148


