Abstract:
BACKGROUND:Polycentric knees for transfemoral prostheses have a variety of geometries, but a survey of literature shows that there are few ways of comparing their performance. OBJECTIVES:Our objective was to present a method for performance comparison of polycentric knee geometries and design a new geometry. STUDY DESIGN:In this work, we define parameters to compare various commercially available prosthetic knees in terms of their stability, toe clearance, maximum flexion, and so on and optimize the parameters to obtain a new knee design. METHODS:We use the defined parameters and optimization to design a new knee geometry that provides the greater stability and toe clearance necessary to navigate uneven terrain which is typically encountered in developing countries. RESULTS:Several commercial knees were compared based on the defined parameters to determine their suitability for uneven terrain. A new knee was designed based on optimization of these parameters. Preliminary user testing indicates that the new knee is very stable and easy to use. CONCLUSION:The methodology can be used for better knee selection and design of more customized knee geometries. Clinical relevance The method provides a tool to aid in the selection and design of polycentric knees for transfemoral prostheses.
journal_name
Prosthet Orthot Intjournal_title
Prosthetics and orthotics internationalauthors
Anand TS,Sujatha Sdoi
10.1177/0309364616652017subject
Has Abstractpub_date
2017-08-01 00:00:00pages
402-411issue
4eissn
0309-3646issn
1746-1553pii
0309364616652017journal_volume
41pub_type
杂志文章abstract:BACKGROUND:High-quality clinical practice guidelines are necessary for effective use of resources both at an individual patient- and national-level. Nordic clinical practice guidelines recommendations for orthotic treatment of knee osteoarthritis vary and little is known about their quality. OBJECTIVES:The aim of the ...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364619857854
更新日期:2019-10-01 00:00:00
abstract:BACKGROUND AND AIM:Sensory feedback systems have been of great interest in upper-limb prosthetics. Despite tremendous research, there are no commercial modality-matched feedback systems. This article aims to introduce the first detachable and feedback add-on option that can be attached to in-use prostheses. TECHNIQUE:...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364616677653
更新日期:2017-06-01 00:00:00
abstract::This paper explores the use of biofeedback to improve gait in Parkinson's disease (PD) and, in particular, reports on the design and testing of a new vibratory orthosis. The orthosis causes a rhythmic vibratory stimulus to be applied to one or other side of the lumbar region. The stimulus is synchronized with stepping...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1080/03093640802647094
更新日期:2009-03-01 00:00:00
abstract:BACKGROUND:Orthotic treatment of idiopathic toe walking is complicated by the lack of a known etiology. This study compared control of toe walking using an articulated ankle-foot orthosis versus a rigid carbon fiber footplate attached to a foot orthosis. OBJECTIVES:Ascertain differences between two orthoses in the con...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章,随机对照试验
doi:10.1177/0309364614564023
更新日期:2016-04-01 00:00:00
abstract:BACKGROUND::Prediction of in-orthosis curvature at pre-orthosis stage is valuable for the treatment planning for adolescent idiopathic scoliosis, while the position of spinal curvature assessment that is effective for this prediction is still unknown. OBJECTIVES::To compare the spinal curvatures in different body posi...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364618798172
更新日期:2019-04-01 00:00:00
abstract::A CAD (computer aided design) analysis software package (CADVIEW) was designed for use with prosthetic and orthotic CAD CAM (computer aided design/computer aided manufacture) systems. Using the Microsoft Windows 3.1 environment, CADVIEW provides a series of anatomical shape viewing and analysis tools. These tools incl...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093649409164393
更新日期:1994-08-01 00:00:00
abstract:BACKGROUND:The functional performance of currently available body-powered prostheses is unknown. OBJECTIVE:The goal of this study was to objectively assess and compare the functional performance of three commonly used body-powered upper limb terminal devices. STUDY DESIGN:Experimental trial. METHODS:A total of 21 ab...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364614554030
更新日期:2016-02-01 00:00:00
abstract:BACKGROUND:Prosthetic gait increases demands on stability. Some variability measures can be used to investigate the stability of movement for prosthetic feet. OBJECTIVES:The purpose of this study was to determine the influence of the prosthetic foot on ground reaction force variability for transtibial amputee gait. S...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364612439572
更新日期:2012-06-01 00:00:00
abstract::A post-clinical investigation has been carried out among 42 unilateral amputees who lost their hand due to an accident. The investigation was directed at two main topics of interest. Firstly the amputee, the problems he has to cope with, and the role the prosthesis plays in his life; and secondly the prosthesis, its u...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093648309166586
更新日期:1983-12-01 00:00:00
abstract::Falling represents a health risk for lower limb amputees fitted with an osseointegrated fixation mainly because of the potential damage to the fixation. The purpose of this study was to characterize a real forward fall that occurred inadvertently to a transfemoral amputee fitted with an osseointegrated fixation while ...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093640903585024
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND:Ankle-foot orthoses are known to have a generally positive effect on gait in stroke, however the specifc type of AFO and the time point at which it is provided are highly variable in the currently available literature. OBJECTIVE:The objective was to determine the immediate spatiotemporal and kinematic effec...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364614538090
更新日期:2015-12-01 00:00:00
abstract::Recently, attempts have been made to construct actuators with similar behaviour to natural muscles. However the results have been inadequate for application to practical prostheses. For example, muscle wire, which has too low an efficiency to be powered by batteries and McKibben muscles which require two power supplie...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1080/03093640208726652
更新日期:2002-12-01 00:00:00
abstract::The purpose of this study was to investigate the effects of a 4 week physiotherapy programme on patients who were given a spinal orthosis for neuromuscular scoliosis. This study was planned as a single group pre- and post-intervention repeated measures design. All patients were given a polyethylene spinal orthosis wit...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093640409167759
更新日期:2004-12-01 00:00:00
abstract::This paper describes a new casting system for transtibial socket fabrication. Like the earlier CIR Sand Casting System, the CIR Casting System is based on the 'dilatancy' principle that is similar to the packaging process for coffee beans by which loose beans become a solid mass when a vacuum is applied. The main diff...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1080/03093640802446703
更新日期:2009-03-01 00:00:00
abstract::Interface pressures and shear stresses at different sagittal plane angular alignment settings were measured on 3 trans-tibial amputee subjects ambulating with patellar-tendon-bearing total contact prostheses. Substantial socket-shank angular alignment modifications in the sagittal plane had minimal effect on stance ph...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093649909071607
更新日期:1999-04-01 00:00:00
abstract:BACKGROUND AND AIM:Microtia is one of the forms of ear loss and deformity. A prosthesis that is simple to apply, and which has adequate suspension and acceptable aesthetics, can be useful in the rehabilitation of patients with this deficit and can improve the social and psychological effects of patients with ear amputa...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364612467344
更新日期:2013-08-01 00:00:00
abstract:BACKGROUND:Children with cerebral palsy (CP) often demonstrate postural control difficulties. Orthotic management may assist in improving postural control in these children. OBJECTIVE:The purpose of this investigation was to examine the influence of floor reaction ankle foot orthosis (FRAFO) on postural flexion called...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364611429855
更新日期:2012-03-01 00:00:00
abstract::The multifunctional above-knee prosthesis WLP-7R (Waseda Leg Prosthesis - type 7 Refined) described in this study allows amputees to descend and ascend stairs with no external power sources. With the hydraulic circuit mounted in the shank, the ankle joint and the knee joint mutually conterbalance during stance phase i...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093648709078198
更新日期:1987-12-01 00:00:00
abstract::A study has been performed to investigate the physical effects of lumbar spinal supports. Two groups were studied, a group of normal male subjects and a group of male low back pain patients. Five different spinal supports were investigated and their effects upon the skin temperature, spinal movements and intra-abdomin...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093648209166772
更新日期:1982-08-01 00:00:00
abstract::In order to reduce the need for repeated changes of socket due to postoperative atrophy and resorption of oedema simple temporary limbs are required to delay the casting of individual sockets until the stump is more mature. A randomized study of 95 below-knee amputees was performed with a re-usable temporary one-size ...
journal_title:Prosthetics and orthotics international
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.3109/03093648309166980
更新日期:1983-08-01 00:00:00
abstract:BACKGROUND:Step counts, obtained via activity monitors, provide insight into activity level in the free-living environment. Accuracy assessments of activity monitors are limited among individuals with lower-limb amputations. OBJECTIVES:(1) To evaluate the step count accuracy of both monitors during forward-linear and ...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364618767138
更新日期:2018-10-01 00:00:00
abstract::In Europe, bespoke orthopaedic shoes are usually sent for a trial fitting in order to check the fit and indicate any modifications required before final finishing. The use of shell shoes at the fit assessment stage, rather than the traditional alternative of partially or fully finished shoes, can offer service advanta...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093649509168002
更新日期:1995-12-01 00:00:00
abstract:BACKGROUND:Patients suffering from medial compartment knee osteoarthritis (OA) may be treated with unloader knee orthoses or laterally wedged insoles. OBJECTIVES:The aim of this study was to identify and compare the effects of them on the gait parameters and pain in these patients. STUDY DESIGN:Quasi-experimental. M...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章,随机对照试验
doi:10.1177/0309364612447094
更新日期:2013-02-01 00:00:00
abstract:BACKGROUND:Conservative pedorthic management of the diabetic foot has been shown to be an effective method to prevent ulcers, amputations, and re-amputations. This article exhibits why and how pedorthics plays such an important role via modalities such as footwear, shoe modifications, custom foot orthoses, and partial ...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章,评审
doi:10.1177/0309364614535233
更新日期:2015-02-01 00:00:00
abstract::The purpose of this study was to review the clinical utility of static weight bearing (SWB) and maximal self-selected ambulatory velocity as objective quantifiable measures in an outpatient lower limb prosthetic clinic. Seventy-three (n = 73) consecutive trans-tibial (TTA) and trans-femoral amputees (TFA) attending an...
journal_title:Prosthetics and orthotics international
pub_type: 临床试验,杂志文章
doi:10.3109/03093649709164553
更新日期:1997-12-01 00:00:00
abstract::In able-bodied individuals, the ankle joint functions to provide shock absorption, aid in foot clearance during the swing phase, and provides a rocker mechanism during stance phase to facilitate forward progression of the body. Prosthetic ankles currently used by persons with lower limb amputations provide considerabl...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1080/02699200701847244
更新日期:2008-03-01 00:00:00
abstract:BACKGROUND:Increased foot temperature among individuals with type 2 diabetes can be predictive of diabetic foot ulcer development. A combination of physiological and mechanical deficiencies may contribute to elevations in intact foot temperature during gait for individuals with type 2 diabetes and transtibial amputatio...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.1177/0309364620968642
更新日期:2020-12-07 00:00:00
abstract::An analysis of 200 patients with congenital limb deficiency who attended the Artificial Limb Centre, Pune from January 1984 to April 1990 is presented. This group is representative of the congenital limb deficient population of the country. The commonest deficiencies were transverse phalangeal total/partial deficiency...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093649409164402
更新日期:1994-12-01 00:00:00
abstract::Modern sockets for lower limb amputees utilize total contact and distribute some weight on the stump end. Its tolerance to bear weight varies but is better after joint disarticulation, however, systematic measures have been missing. Different levels, indications, shapes etc. were analysed with 102 measurements in 69 p...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093648209166575
更新日期:1982-12-01 00:00:00
abstract::Long-term results over a period of more than 10 years give evidence of the superiority of the through-knee compared to the above-knee stump. However, failures in through-knee stumps before, during and after operation and pitfalls in prosthetic fitting are still too frequent. They are mostly due to errors because the p...
journal_title:Prosthetics and orthotics international
pub_type: 杂志文章
doi:10.3109/03093648309166986
更新日期:1983-08-01 00:00:00