当前位置： SCI文献检索 > JOURNAL OF BIOMECHANICS期刊下所有文献 > Hip contact forces and gait patterns from routine activities.

Hip contact forces and gait patterns from routine activities.

Abstract：

:In vivo loads acting at the hip joint have so far only been measured in few patients and without detailed documentation of gait data. Such information is required to test and improve wear, strength and fixation stability of hip implants. Measurements of hip contact forces with instrumented implants and synchronous analyses of gait patterns and ground reaction forces were performed in four patients during the most frequent activities of daily living. From the individual data sets an average was calculated. The paper focuses on the loading of the femoral implant component but complete data are additionally stored on an associated compact disc. It contains complete gait and hip contact force data as well as calculated muscle activities during walking and stair climbing and the frequencies of daily activities observed in hip patients. The mechanical loading and function of the hip joint and proximal femur is thereby completely documented. The average patient loaded his hip joint with 238% BW (percent of body weight) when walking at about 4 km/h and with slightly less when standing on one leg. This is below the levels previously reported for two other patients (Bergmann et al., Clinical Biomechanics 26 (1993) 969-990). When climbing upstairs the joint contact force is 251% BW which is less than 260% BW when going downstairs. Inwards torsion of the implant is probably critical for the stem fixation. On average it is 23% larger when going upstairs than during normal level walking. The inter- and intra-individual variations during stair climbing are large and the highest torque values are 83% larger than during normal walking. Because the hip joint loading during all other common activities of most hip patients are comparably small (except during stumbling), implants should mainly be tested with loading conditions that mimic walking and stair climbing.

journal_name

J Biomech

journal_title

Journal of biomechanics

authors

Bergmann G,Deuretzbacher G,Heller M,Graichen F,Rohlmann A,Strauss J,Duda GN

doi

10.1016/s0021-9290(01)00040-9

keywords:

subject

Has Abstract

pub_date

2001-07-01 00:00:00

pages

859-71

issue

eissn

0021-9290

issn

1873-2380

pii

S0021-9290(01)00040-9

journal_volume

pub_type

杂志文章

在线工具

Hip contact forces and gait patterns from routine activities.