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Auteur Sun-Pui Ng
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la rechercheAnalysis of insole geometry and deformity by using a three-dimensional image processing technique: a preliminary study / Kit-Lun Yick in Journal of the American Podiatric Medical Association, vol. 109, 02 (Mars-avril 2019)
[article]
in Journal of the American Podiatric Medical Association > vol. 109, 02 (Mars-avril 2019) . - p. 98-107
Titre : Analysis of insole geometry and deformity by using a three-dimensional image processing technique: a preliminary study Type de document : article de périodique Auteurs : Kit-Lun Yick ; Wai-ting Lo ; Sun-Pui Ng ; Joanne Yip ; Hung-hei Kwan ; Yan-Yee Kwong ; Fai-chun Cheng Année de publication : 2019 Article en page(s) : p. 98-107 Langues : Anglais (eng) Descripteurs (mots clés) : [Thésaurus HELB]:Paramédical:Pression plantaire
[Thésaurus Mesh]Orthèses de pied
[Thésaurus Mesh]Pied diabétique
[Thésaurus Mesh]TomodensitométrieMots-clés : diabetic foot foot orthoses plantar pressure tomography, X-ray computed Résumé : Background: Accurate representation of the insole geometry is crucial for the development and performance evaluation of foot orthoses designed to redistribute plantar pressure, especially for diabetic patients. Methods: Considering the limitations in the type of equipment and space available in clinical practices, this study adopted a simple portable three-dimensional (3-D) desktop scanner to evaluate the 3-D geometry of an orthotic insole and the corresponding deformities after the insole has been worn. The shape of the insole structure along horizontal cross sections is defined with 3-D scanning and image processing. Accompanied by an in-shoe pressure measurement system, plantar pressure distribution in four foot regions (hallux, metatarsal heads, midfoot, and heel) is analyzed and evaluated for insole deformity. Results: Insole deformities are quantified across the four foot regions. The hallux region tends to show the greatest changes in shape geometry (17%–50%) compared with the other foot regions after 2 months of insole wear. As a result of insole deformities, plantar peak pressures change considerably (–4.3% to +69.5%) during the course of treatment. Conclusions: Changes in shape geometry of the insoles could be objectively quantified with 3-D scanning techniques and image processing. This investigation finds that, in general, the design of orthotic insoles may not be adequate for diabetic individuals with similar foot problems. The drastic changes in the insole shape geometry and crosssectional areas during orthotic treatment may reduce insole fit and conformity. An inadequate insole design may also affect plantar pressure reduction. The approach proposed herein, therefore, allows for objective quantification of insole shape geometry, which results in effective and optimal orthotic treatment. Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité J Périodique Erasme - périodiques Périodiques Disponible Effects of in-shoe midsole cushioning on leg muscle balance and co-contraction with increased heel height during walking / Kit-Lun Yick in Journal of the American Podiatric Medical Association, vol. 108, 6 (Novembre - décembre 2018)
[article]
in Journal of the American Podiatric Medical Association > vol. 108, 6 (Novembre - décembre 2018) . - p. 449-457
Titre : Effects of in-shoe midsole cushioning on leg muscle balance and co-contraction with increased heel height during walking Type de document : article de périodique Auteurs : Kit-Lun Yick, Auteur ; Ka-Lai Yeung, Auteur ; Yee-Nee Lam, Auteur ; Sun-Pui Ng, Auteur Année de publication : 2018 Article en page(s) : p. 449-457 Langues : Anglais (eng) Descripteurs (mots clés) : [Thésaurus Mesh]Chaussures
[Thésaurus Mesh]Jambe
[Thésaurus Mesh]Marche à pied
[Thésaurus Mesh]Muscles
[Thésaurus Mesh]Orthèses de pied
[Thésaurus HELB]:Paramédical:amortissementMots-clés : walking shoes foot orthoses leg muscle Résumé : Background: The midsole is an essential assembly of footwear for retaining the shape of the shoe, delivering support to the foot, and serving as a cushioning and stability device for walking. To improve leg muscle balance and muscle co-contraction, we propose a new midsole design for high heels with different hardness levels at the forefoot region.
Methods: Five healthy women participated in the study, with a mean ± SD age of 21.80 ± 4.09 years, and duration of high-heeled shoe wear of 5.20 ± 4.09 years. Two midsole conditions, control and multiple-hardness midsole (MHM), with heel heights of 2 (flat), 5, and 8 cm were used. The main outcome measures were to examine the acute effects of MHM by electromyography on muscle activity balance and co-contraction at varying heel heights during shuttle walk.
Results: Use of the MHM significantly reduced the muscle activity ratio between the medial and lateral gastrocnemius muscles (P = .043) during push-off to heel strike with a heel height of 5 cm (−22.74%) and heel strike to midstance with a heel height of 8 cm (−22.26%). The increased co-contraction indices of the tibialis anterior–peroneus longus muscles (14.35% with an 8-cm heel height) and tibialis anterior–soleus muscles (15.18% with a 5-cm heel height) are significant (P = .043), with a large effect size (d = 0.8).
Conclusions: These results deliver important implications in advancing the engineering of MHM design without changing the in-shoe volume to enhance leg muscle balance and co-contraction during walking.
Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité J Périodique Erasme - périodiques Périodiques Disponible