3-dimensional knee model fiber length change medial patellofemoral ligament patella
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摘要

BACKGROUND:In vivo length change behavior of native medial patellofemoral ligament (MPFL) fibers throughout the range of knee motion has not been reported in vivo.
PURPOSE:To measure the length changes of various fibers of the MPFL and to determine their length change patterns during in vivo passive knee flexion.
STUDY DESIGN:Descriptive laboratory study.
METHODS:The right knees of 11 living subjects were scanned with a high-resolution computed tomography scanner at 0°, 30°, 60°, 90°, and 120° of knee flexion, and 3-dimensional (3D) models were constructed using customized software. Five patellar points were determined: 20% (point 20), 30% (point 30), 40% (point 40), 50% (point 50), and 60% (point 60) from the superior pole of the patella. The Schöttle femoral point (point F) was marked on a translucent 3D model of a true lateral view. Five virtual fibers connecting these points on the 3D knee model were created, and the lengths of various fibers were digitally measured.
RESULTS:The average length changes were 9.1±2.5 mm in F20, 9.1±2.5 mm in F30, 8.1±2.6 mm in F40, 6.9±2.4 mm in F50, and 6.9±1.7 mm in F60. There were significant differences in length changes of these 5 fibers (P

译文

背景: 在膝关节活动范围内,天然内侧股骨韧带 (MPFL) 纤维的体内长度变化行为尚未在体内报道。
目的: 测量 MPFL 各种纤维的长度变化,并确定它们在体内被动膝关节屈曲过程中的长度变化模式。
研究设计: 描述性实验室研究。
方法: 用高分辨率计算机断层扫描仪对 11 名活体受试者的右膝屈曲度分别为 0 ° 、 30 ° 、 60 ° 、 90 ° 和 120 °, 使用定制软件构建三维模型。确定了五个髌骨点: 20% (20 点) 、 30% (30 点) 、 40% (40 点) 、 50% (50 点) 和 60% (60 点) 从膝盖骨的上极。Sch ö tle 股骨点 (点 F) 标记在真实侧视图的半透明 3D 模型上。创建了连接 3D 膝关节模型上这些点的五根虚拟纤维,并对各种纤维的长度进行了数字测量。
结果: 平均长度变化 9.1 ± 2。 f20 为 5毫米,9.1 ± 2. f30 为 5毫米,8.1 ± 2. f40 为 6毫米,6.9 ± 2. f50 为 4毫米,6.9 ± 1。 f60 的 7毫米。这 5 种纤维的长度变化有显著性差异 (P

Flexion

骨科 关节运动 临床研究术语
概述  :  

关节的运动形式通常包括屈曲、伸直、内收、外展、内旋、外旋。 各部位活动度(1)颈部活动度中立位:面向前,眼平视,下颌内收。颈部活动度为:前屈35°-45°;后伸35°-45°;左右侧屈各45°:左右旋转各60°-80°。(2)腰部活动度   腰椎中立位不易确定。    前屈:测量数值不易准确,患者直立,向前弯腰,正常时中指尖可达足面,腰椎呈弧形,一般称之为90°。后伸:30°。侧屈:左右各30°。侧旋:固定骨盆后脊柱左右旋转的程度,应依据旋转后两肩连线

Flexion 英 /'flekʃ(ə)n/      

释义   n. 弯曲,弯曲状态;弯曲部分

例句   To achieve this, you have to have maximum ankle flexibility for good catch, and good knee flexion to maintain the range of motions. 为了达到这一点,你必须有极佳的脚踝灵活性去实现好的抓水,极佳的膝盖弯曲度去保持动作的幅度。


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