誘導成長による回転速度と回転速度との間には負の相関関係があるのでしょうか? ゲヌ・ヴァラムによる138本の肢体に関する遡及的研究
Bicheng Yong1, Nicolas Lubega2, Samuel Maina2
1Department of Pediatric Orthopedics, Beit CURE Children's Hospital of Malawi, Chipatala Avenue P.O Box 31236, Chichiri, Blantyre 3, Malawi. yongbicheng@hotmail.com.
まとめ
伸縮帯のプレートを使用する子供では,スクリューの長さは,より迅速なゲヌ・ヴァーラム (弓脚) 矯正の鍵です. 短めの螺栓と成長板の近さは 矯正の速度を向上させますが 代謝疾患はそれを遅らせます
科学分野:
- 整形外科
- 小児整形外科
- 骨格の成長調節
背景:
- 骨格が未成熟の患者でよく見られる角形変形である.
- パラフィーゼの張力帯板は,角修正に使用されます.
- 修正の速度に影響を与える要因については,さらなる調査が必要である.
研究 の 目的:
- 小児のゲヌヴァルムにおける角修正率に影響を与える要因を特定する.
- スクリューの長さ,偏差,変形の重さ,病理が修正速度に与える影響を調査する.
- テンション・バンド・プレートを用いてジェヌ・ヴァラムの処理戦略を最適化する.
主な方法:
- 骨格が未成熟の53人のゲヌ・ヴァラム患者の遡及的分析
- パラフィザル張力帯板で処理された138のフィーズ (遠足骨と近隣の骨) の評価.
- 変形の重度,相対螺栓の長さ,修正速度 (度数/月),初期螺栓の偏差値の計算
主要な成果:
- 矯正のスピードは骨格の成熟に近づいた患者でより速かった.
- 代謝疾患によるゲヌ・ヴァラムは,最も遅い修正速度 (0. 76°/月) を示した.
- 修正率は,相対的なスクリュー長さと負の相関関係にあった (線形回帰係数: -2.39; P<0.01).
結論:
- スクリューの長さは,パラフィーゼルの張力帯板によるゲヌ・ヴァラム補正の速度に影響を与える重要な要因です.
- スクリューの相対的な長さは修正速度に悪影響を及ぼし,より短いスクリューがより効果的であることを示唆しています.
- エチオロジーと身体の位置が重要な役割を果たしますが,スクルーの長さは重要な変更可能なパラメータとして現れます.
関連する概念動画
Screw: Problem Solving
458
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...
458
Self-Locking Screw
1.7K
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.
1.7K
Frictional Forces on Screws
1.3K
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...
1.3K
Distance Corrections
81
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
81
Normal Strain under Axial Loading
654
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
654
Influence of Earth's Curvature and Atmospheric Refraction on Leveling
266
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
266


