KINEMATICS AND STABILITY OF THE ARCH OF THE FOOT

足弓的运动学和稳定性

• 批准号: 6374972
• 负责人: HAROLD B KITAOKA
• 金额: $ 12.42万
• 依托单位: MAYO CLINIC ROCHESTER
• 依托单位国家: 美国
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 2003-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6374972
• 关键词: ankle; arthrodesis; biomechanics; clinical research; elasticity; evaluation /testing; foot; gait; human tissue; joint ligament; mechanical pressure; orthopedics; skeletal disorder; skeletal stress; statistics /biometry; tendons; tibia

The arch of the foot is important in performing activities to provide a stable base for weight bearing, flexibility to accommodate different ground conditions, and also to dissipate loads from weight bearing. The arch is constrained by bony and articular geometry, ligaments, joint capsules, and fascia. Posterior tibial tendon dysfunction (PTTD) is associated with loss of these constraints, leading to pain, impaired function, and flatfoot deformity. This study will focus upon four specific aims related to function of the arch and to mechanical behavior of the foot with orthoses or reconstruction procedures for PTTD and flatfoot. Hypothesis 1: Normal gait may be observed in vitro with a dynamic ankle simulator. Specific Aim 1: To determine foot and ankle kinematics, ground reaction force, and center of pressure advancement in level walking in normals. Hypothesis 2: Posterior tibial tendon dysfunction and flatfoot are associated with markedly abnormal foot and ankle kinematics, ground reaction force, and center of pressure advancement in level walking. Specific Aim 2: To determine foot and ankle kinematics in cadaveric feet with simulated posterior tibial tendon dysfunction and flatfoot and compare results with normals. Hypothesis 3: Hindfoot orthoses (HFO) improve foot and ankle function in feet with posterior tibial tendon dysfunction and flatfoot on level walking. Specific Aim 3: To evaluate mechanical behavior of the foot and ankle with posterior tibial tendon dysfunction and flatfoot treated with articulated and nonarticulated HFO on level walking. Hypothesis 4: Reconstruction operations for posterior tibial tendon dysfunction and flatfoot which do not involve extensive arthrodesis improve foot and ankle function in level walking. Specific Aim 4: To evaluate mechanical behavior of the foot and ankle with three recently developed and yet to be proven operations for posterior tibial tendon dysfunction and flatfoot: lateral column lengthening (LCL), medial displacement calcaneal osteotomy (MDO), and Giannini subtalar implant.

脚的拱门对于执行活动以提供稳定的重量轴承，灵活性以适应不同的地面条件以及从负重轴承降低负载。 拱门受到骨和关节几何形状，韧带，关节胶囊和筋膜的约束。胫骨后肌腱功能障碍（PTTD）与这些约束的丢失有关，导致疼痛，功能受损和扁平足畸形。 这项研究将重点介绍与拱门功能以及使用PTTD和Flatfoot的矫形器或重建程序有关的四个特定目标。假设1：可以通过动态踝关节模拟器在体外观察到正常步态。 具体目标1：确定脚和踝运动学，地面反作用力以及正常行走水平行走的压力进步中心。 假设2：胫骨后肌腱功能障碍和扁平足与脚部异常异常和脚踝运动学，地面反作用力以及水平步行中压力发展的中心有​​关。特定目标2：确定尸体脚的脚和脚踝运动学，具有模拟的胫骨后肌腱功能障碍和扁平足，并将结果与​​正常的结果进行比较。 假设3：后脚矫形器（HFO）在胫骨后肌腱功能障碍和扁平足动物上以脚部的脚部为脚，改善脚和脚踝功能。 特定目的3：用胫骨后肌腱功能障碍和扁平脚部在水平步行上评估脚和脚踝的机械行为，并用铰接和非明显的HFO处理。 假设4：胫骨后肌腱功能障碍和扁平足的重建操作，不涉及广泛的关节固定术在水平步行中提高脚和脚踝功能。 具体目的4：评估脚和踝关节的机械行为，具有三个最近开发的，尚未被证明是胫骨后肌腱功能障碍和扁平足的操作：侧柱延长（LCL），内侧骨化骨骨骨骨骨体切开术（MDO）和Gianninii subtalar植入物。

项目成果

Posterior tibial tendon dysfunction and flatfoot: analysis with simulated walking.

• DOI: 10.1016/j.gaitpost.2012.07.015
• 发表时间: 2013-02
• 期刊: Gait & posture
• 影响因子: 2.4
• 作者: Watanabe K;Kitaoka HB;Fujii T;Crevoisier X;Berglund LJ;Zhao KD;Kaufman KR;An KN
• 通讯作者: An KN