The effect of partial weight bearing in a walking boot on plantar pressure distribution and center of pressure

The quantification of plantar pressure distribution is widely done in the diagnosis of lower limbs deformities, gait analysis, footwear design, and sport applications. To date, a number of pressure insole layouts have been proposed, with different configurations according to their applications. The goal of this study is to assess the validity of a 16-sensors (1.5 × 1.5 cm) pressure insole to detect plantar pressure distribution during different tasks in the clinic and sport domains. The data of 39 healthy adults, acquired with a Pedar-X® system (Novel GmbH, Munich, Germany) during walking, weight lifting, and drop landing, were used to simulate the insole. The sensors were distributed by considering the location of the peak pressure on all trials: 4 on the hindfoot, 3 on the midfoot, and 9 on the forefoot. The following variables were computed with both systems and compared by estimating the Root Mean Square Error (RMSE): Peak/Mean Pressure, Ground Reaction Force (GRF), Center of Pressure (COP), the distance between COP and the origin, the Contact Area. The lowest (0.61%) and highest (82.4%) RMSE values were detected during gait on the medial-lateral COP and the GRF, respectively. This approach could be used for testing different layouts on various applications prior to production.

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A New Method in the Design of a Dynamic Pedorthosis for Children With Residual Clubfoot

Journal of Medical Devices ◽

10.1115/1.4001814 ◽

2010 ◽

Vol 4 (2) ◽

Cited By ~ 3

Author(s):

Robert Rizza ◽

XueCheng Liu ◽

John Thometz ◽

Roger Lyon ◽

Channing Tassone

Keyword(s):

Pressure Distribution ◽

Computer Aided Design ◽

Center Of Pressure ◽

Weight Bearing ◽

Selective Laser Sintering ◽

Time Frame ◽

Plantar Pressure Distribution ◽

Treatment Trends ◽

Aided Design ◽

Night Splints

Clubfoot is a common pediatric orthopaedic deformity. Despite the popularity of Ponseti’s method and night splints such as the Denis–Browne method, there is still an 11–47% rate of deformity relapse reported in the literature. The technique to make traditional orthotics is dependent on a nonweight-bearing casting or foot imprint. These splints outdate clinical treatment trends and only apply to patients who are of nonwalking age. This study shows that a new procedure utilizing computer aided design and the finite element method can be employed to develop a customized weight-bearing dynamic orthotic. In addition, the plantar pressure distribution and the trajectory of the center of this pressure distribution are used to design the orthotic. It is shown that the trajectory of the center of pressure, traditionally used in gait analysis, can be used not only to quantify the severity of the foot deformity but to design a custom orthotic as well. Also, the new procedure allows the custom orthotic to be designed and analyzed within a day. The new orthotic design is composed of soft foam interior layers and a polymer supportive exterior layer. It is proved that rapid prototyping technologies employing selective laser sintering can be used to construct these layers to produce a custom orthotic within a 24 h time frame.

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Recognition of Gait Patterns with Partial Weight Bearing using Insole Plantar Pressure Sensor

Modelling, Identification and Control / 801: Advances in Computer Science ◽

10.2316/p.2013.799-093 ◽

2013 ◽

Author(s):

Sheng-Wen Lin ◽

Chiu-Ching Tuan ◽

Tsair-Fwu Lee ◽

Chi-Heng Lu ◽

Chia-Hsieh Chang ◽

...

Keyword(s):

Pressure Sensor ◽

Plantar Pressure ◽

Weight Bearing ◽

Partial Weight Bearing ◽

Gait Patterns ◽

Partial Weight

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Biomechanical Evaluation of the Efficacy of External Stabilizers in the Conservative Treatment of Acquired Flatfoot Deformity

Foot & Ankle International ◽

10.1177/107110070202300809 ◽

2002 ◽

Vol 23 (8) ◽

pp. 727-737 ◽

Cited By ~ 38

Author(s):

Carl W. Imhauser ◽

Nicholas A. Abidi ◽

David Z. Frankel ◽

Kenneth Gavin ◽

Sorin Siegler

Keyword(s):

Pressure Distribution ◽

Plantar Pressure ◽

Center Of Pressure ◽

Lower Limbs ◽

Quiet Standing ◽

Medial Longitudinal Arch ◽

Longitudinal Arch ◽

Plantar Pressure Distribution ◽

Flexible Flatfoot ◽

Fresh Frozen

This study quantified and compared the efficacy of in-shoe orthoses and ankle braces in stabilizing the hindfoot and medial longitudinal arch in a cadaveric model of acquired flexible flatfoot deformity. This was addressed by combining measurement of hindfoot and arch kinematics with plantar pressure distribution, produced in response to axial loads simulating quiet standing. Experiments were conducted on six fresh-frozen cadaveric lower limbs. Three conditions were tested: intact-unbraced; flatfoot-unbraced; and flatfoot-braced. Flatfoot deformity was created by sectioning the main support structures of the medial longitudinal arch. Six different braces were tested including two in-shoe orthoses, three ankle braces and one molded ankle-foot orthosis. Our model of flexible flatfoot deformity caused the calcaneus to evert, the talus to plantarflex and the height of the talus and medial cuneiform to decrease. Flexible flatfoot deformity caused a pattern of medial shift in plantar pressure distribution, but minimal change in the location of the center of pressure. Furthermore, in-shoe orthoses stabilized both the hindfoot and the medial longitudinal arch, while ankle braces did not. Semi-rigid foot and ankle orthoses acted to stabilize the medial longitudinal arch. Based on these results, it was concluded that treatment of flatfoot deformity should at least include use of in-shoe orthoses to partially restore the arch and stabilize the hindfoot.

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Effect of PSSE on Plantar Pressure Distribution and Balance in Scoliosis

Case Medical Research ◽

10.31525/ct1-nct04226209 ◽

2020 ◽

Author(s):

Keyword(s):

Pressure Distribution ◽

Plantar Pressure ◽

Plantar Pressure Distribution

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419 EFFECT OF MONOCHROMATIC NEAR INFRARED ENERGY ON NEUROPATHY, PLANTAR PRESSURE DISTRIBUTION AND BALANCE IN PATIENTS WITH DIABETIC NEUROPATHY

European Journal of Pain ◽

10.1016/j.ejpain.2007.03.434 ◽

2007 ◽

Vol 11 (S1) ◽

pp. S186-S186

Author(s):

S.P Madani ◽

N. Lessan ◽

M. Akbari ◽

S. Amirimoghaddam ◽

R. Heshmat ◽

...

Keyword(s):

Diabetic Neuropathy ◽

Pressure Distribution ◽

Plantar Pressure ◽

Near Infrared ◽

Plantar Pressure Distribution

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Differences in femoral component subsidence rate after THA using an uncemented collarless femoral stem: full weight-bearing with an enhanced recovery rehabilitation versus partial weight-bearing

Archives of Orthopaedic and Trauma Surgery ◽

10.1007/s00402-021-03913-0 ◽

2021 ◽

Author(s):

Franziska Leiss ◽

Julia Sabrina Götz ◽

Matthias Meyer ◽

Günther Maderbacher ◽

Jan Reinhard ◽

...

Keyword(s):

Risk Factors ◽

Enhanced Recovery ◽

Weight Bearing ◽

Femoral Stem ◽

Full Weight Bearing ◽

Partial Weight Bearing ◽

Fill Ratio ◽

Stem Subsidence ◽

Partial Weight

Abstract Background Femoral component subsidence is a known risk factor for early failure of total hip arthroplasty (THA) using cementless stems. The aim of the study was to compare an enhanced recovery concept with early full weight-bearing rehabilitation and partial weight-bearing on stem subsidence. In addition, the influence of patient-related and anatomical risk factors on subsidence shall be assessed. Methods One hundred and fourteen patients underwent primary cementless THA and were retrospectively analyzed. Sixty-three patients had an enhanced recovery rehabilitation with early full weight-bearing and 51 patients had rehabilitation with partial weight-bearing (20 kg) for 6 weeks. Postoperative subsidence was analyzed on standing pelvic anterior–posterior radiographs after 4 weeks and 1 year. Subsidence was measured in mm. Anatomical and prosthetic risk factors (stem size, canal flare index, canal fill ratio as well as BMI and demographic data) were correlated. Results Femoral stem subsidence rate was significantly higher for the group with an enhanced recovery concept compared to the group with partial weight-bearing at the first radiological follow up after 4 weeks [2.54 mm (SD ± 1.86) vs. 1.55 mm (SD ± 1.80)] and the second radiological follow up after 1 year [3.43 mm (SD ± 2.24) vs. 1.94 (SD ± 2.16)] (p < 0.001, respectively). Stem angulation > 3° had a significant influence on subsidence. Canal flare index and canal fill ratio showed no significant correlation with subsidence as well as BMI and age. Conclusion In the present study, cementless stem subsidence was significantly higher in the group with enhanced recovery rehabilitation compared to partial weight-bearing. Small absolute values and differences were demonstrated and therefore possibly below clinical relevance. Anatomical radiological parameters and anthropometric data did not appear to be risk factors for stem subsidence.

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