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Metallic resurfacing hemiarthroplasty of the first metatarsophalangeal joint combined with first metatarsal osteotomy for the treatment of hallux rigidus with hallux valgus in China

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Chinese Medical Journal 2014年第11期127卷 2186-2188页

作者： Jin Kaiji Wang Yuanli Fu Zhongguo An Shuai Xu Hailin Jiang Baoguo Department of Orthopedics & Trauma Peking University People's Hospital Beijing 100044 China Department of Orthopedics Peking Longfu Hospital Beijing 100010 China

Hallux rigidus occurs mainly at the first metatarsophalangeal （MTP） joint,causing localized pain and degenerative arthritis.1 This condition frequently occurs together with hallux valgus and is difficult to *** hallux rigidus affecting only one joint,the treatment choices include articular debridement,resection arthroplasty,prosthetic arthroplasty,and arthrodesis,depending on the degree of arthritis.

关键词： hallux rigidus hallux valgus metallic resurfacing hemiarthroplasty metatarsophalangeal joint

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The Human Ankle-Foot Complex as a Multi-Configurable Mechanism during the Stance Phase of Walking

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Journal of Bionic Engineering 2010年第3期7卷 211-218页

作者： Amaraporn Boonpratatong School of Mechanical Aerospace and Civil EngineeringUniversity of Manchester

The objective of this study is to investigate the biomechanical functions of the human ankle-toot complex during the stancephase of walking. The three-dimensional (3D) gait measurement was conducted by using a 3D infrared multi-camera system anda force plate array to record the Ground Reaction Forces (GRF) and segmental motions simultaneously. The ankle-foot complexwas modelled as a four-segment system, connected by three joints: talocrural joint, sub-talar joint and metatarsophalangeal *** subject-specific joint orientations and locations were determined using a functional joint method based on the particleswarm optimisation algorithm. The GRF moment arms and joint moments acting around the talocrural and sub-talar joints werecalculated over the entire stance phase. The estimated talocrural and sub-talar joint locations show noticeable obliquity. Thekinematic and kinetic results strongly suggest that the human ankle-foot complex works as a mechanical mechanism with twodifferent configurations in stance phase of walking. These lead to a significant decrease in the GRF moment arms therebyincreasing the effective mechanical advantages of the ankle plantarflexor muscles. This reconfigurable mechanism enhancesmuscle effectiveness during locomotion by modulating the gear ratio of the ankle plantarflexor muscles in stance. This studyalso reveals many factors may contribute to the locomotor function of the human ankle-foot complex, which include not only itsre-configurable structure, but also its obliquely arranged joints, the characteristic heel-to-toe Centre of Pressure (COP) motionand also the medially acting GRF pattern. Although the human ankle-foot structure is immensely complex, it seems that itsconfiguration and each constitutive component are well tuned to maximise locomotor efficiency and also to minimise risk ofinjury. This result would advance our understanding of the locomotor function of the ankle-foot complex, and also the intrinsicdesign of the ankle-

关键词： ankle foot talocrural joint sub-talar joint metatarsophalangeal joint ground reaction force moment arm reconfigurable mechanism

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Mineralized collagen artificial bone repair material products used for fusing the podarthral joints with internal fixation—a case report

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Regenerative Biomaterials 2017年第5期4卷 295-298页

作者： Nihar S.Ghate Helen Cui Division of Foot and Ankle Surgery Indiana Regional Medical CenterIndianaPA 15701USA Beijing Allgens Medical Science and Technology Co. Ltd.Beijing 100176China

In this study,we reported a case with collapse and subluxation of metatarsal-cuneiform joint,navicular-cuneiform joint with subluxed the right first metatarsophalangeal *** injured medial column was internally fixed with compression *** fusion site was firmed up with BonGoldVR Bone Sponge and Bone *** prognosis of fused navicular-cuneiform joint and metatarsal-cuneiform joint were examined by X-ray shortly after surgical operation and followed up 2,4,6,9 and 13 weeks after the surgical *** column was perfectly fused by compression *** results justified and favored the application of mineralized collagen as an excellent alternative to autograft in fusing the podarthral joints with internal fixation.

关键词： medial column metatarsophalangeal joint navicular-cuneiform fusion mineralized collagen

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