In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

10.3791/62792 ◽  
2021 ◽  
Author(s):  
Penny R. Atkins ◽  
Niccolo M. Fiorentino ◽  
Andrew E. Anderson
Keyword(s):  
Weight Bearing ◽  
Dynamic Weight

In Vivo Motion Characteristics of the Lower Cervical Spine During Dynamic Weight-Bearing Flexion-Extension

2015 ◽  
Vol 15 (10) ◽  
pp. S183-S184
Author(s):  
Sean J. Driscoll ◽  
Haiqing Mao ◽  
Shaobai Wang ◽  
Weiye Zhong ◽  
Guoan Li ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Weight Bearing ◽  
Lower Cervical Spine ◽  
Dynamic Weight ◽  
Flexion Extension ◽  
Motion Characteristics

scholarly journals In vivo contact kinematics and contact forces of the knee after total knee arthroplasty during dynamic weight-bearing activities

2008 ◽  
Vol 41 (10) ◽  
pp. 2159-2168 ◽  
Author(s):  
Kartik M. Varadarajan ◽  
Angela L. Moynihan ◽  
Darryl D’Lima ◽  
Clifford W. Colwell ◽  
Guoan Li
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Weight Bearing ◽  
Contact Forces ◽  
Dynamic Weight ◽  
Contact Kinematics ◽  
Total Knee

scholarly journals Kinematics of the Normal Knee during Dynamic Activities: A Synthesis of Data from Intracortical Pins and Biplane Imaging

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Xavier Gasparutto ◽  
Florent Moissenet ◽  
Yoann Lafon ◽  
Laurence Chèze ◽  
Raphaël Dumas
Keyword(s):  
Gold Standard ◽  
Degrees Of Freedom ◽  
Weight Bearing ◽  
Model Development ◽  
Measurement Methods ◽  
Standard Measurement ◽  
Normal Knee ◽  
Dynamic Weight ◽  
Tibiofemoral Kinematics

Few studies have provided in vivo tibiofemoral kinematics of the normal knee during dynamic weight-bearing activities. Indeed, gold standard measurement methods (i.e., intracortical pins and biplane imaging) raise ethical and experimental issues. Moreover, the conventions used for the processing of the kinematics show large inconsistencies. This study aims at synthesising the tibiofemoral kinematics measured with gold standard measurement methods. Published kinematic data were transformed in the standard recommended by the International Society of Biomechanics (ISB), and a clustering method was applied to investigate whether the couplings between the degrees of freedom (DoFs) are consistent among the different activities and measurement methods. The synthesised couplings between the DoFs during knee flexion (from 4° of extension to −61° of flexion) included abduction (up to −10°); internal rotation (up to 15°); and medial (up to 10 mm), anterior (up to 25 mm), and proximal (up to 28 mm) displacements. These synthesised couplings appeared mainly partitioned into two clusters that featured all the dynamic weight-bearing activities and all the measurement methods. Thus, the effect of the dynamic activities on the couplings between the tibiofemoral DoFs appeared to be limited. The synthesised data might be used as a reference of normal in vivo knee kinematics for prosthetic and orthotic design and for knee biomechanical model development and validation.

scholarly journals [3H]proline incorporation and hydroxyproline concentration in articular cartilage during the development of osteoarthritis caused by immobilization. A study in vivo with rabbits

1981 ◽  
Vol 200 (2) ◽  
pp. 435-440 ◽  
Author(s):  
T Videman ◽  
I Eronen ◽  
T Candolin
Keyword(s):  
Total Protein ◽  
Collagen Synthesis ◽  
Weight Bearing ◽  
Specific Radioactivity ◽  
Collagen Content ◽  
Synthetic Activity ◽  
Synthesis Rate ◽  
Hydroxyproline Concentration ◽  
Proline Incorporation

Proline metabolism in vivo was studied during the development of immobilization osteoarthritis in rabbits. Collagen content was measured as the hydroxyproline concentration of the tissue in question. The incorporation of [3H]proline was used as the indicator for total protein synthesis; collagen synthesis rate was estimated from measurements of the specific radioactivity of hydroxyproline. Cartilage samples from knee and hip joints were analysed after 3, 7, 11, 18, 35 and 56 days of immobilization. The total protein and collagen synthesis rates of the immobilized legs increased and reached a maximum after 11-35 days. Although they decreased thereafter, these rates remained elevated to the end of the experiment. A slight increase in the synthetic activity of the non-immobilized contralateral legs was also detected after 7--18 days of immobilization. The isotope incorporation was markedly higher in tibial marginal tissue than in weight-bearing cartilage. In spite of the increased synthesis, no clear changes were found in the collagen content of the tissues studied during the experiment.

In Vivo Tibiofemoral Contact Kinematics and Contact Forces During Dynamic Weight-Bearing Activities Following Total Knee Arthroplasty

2008 ◽  
Author(s):  
Kartik M. Varadarajan ◽  
Angela Moynihan ◽  
Darryl D’Lima ◽  
Clifford W. Colwell ◽  
Harry E. Rubash ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Computational Models ◽  
Imaging System ◽  
Weight Bearing ◽  
Contact Forces ◽  
Inverse Dynamic ◽  
Contact Kinematics ◽  
Total Knee

Accurate knowledge of in vivo articular contact kinematics and contact forces is required to quantitatively understand factors limiting life of total knee arthroplasty (TKA) implants, such as polyethylene component wear and implant loosening [1]. Determination of in vivo tibiofemoral contact forces has been a challenging issue in biomechanics. Historically, instrumented tibial implants have been used to measure tibiofemoral forces in vitro [2] and computational models involving inverse dynamic optimization have been used to estimate joint forces in vivo [3]. Recently, D’Lima et al. reported the first in vivo measurement of 6DOF tibiofemoral forces via an instrumented implant in a TKA patient [4]. However this technique does not provide a direct estimation of tibiofemoral contact forces in the medial and lateral compartments. Recently, a dual fluoroscopic imaging system has been used to accurately determine tibiofemoral contact locations on the medial and lateral tibial polyethylene surfaces [5]. The objective of this study was to combine the dual fluoroscope technique and the instrumented TKAs to determine the dynamic 3D articular contact kinematics and contact forces on the medial and lateral tibial polyethylene surfaces during functional activities.

scholarly journals Thermal hyperalgesia and dynamic weight bearing share similar recovery dynamics in a sciatic nerve entrapment injury model

2021 ◽  
Vol 10 ◽  
pp. 100079
Author(s):  
Garrett D. Sheehan ◽  
Molly K. Martin ◽  
Violet A. Young ◽  
Rasheen Powell ◽  
Arin Bhattacharjee
Keyword(s):  
Sciatic Nerve ◽  
Weight Bearing ◽  
Thermal Hyperalgesia ◽  
Nerve Entrapment ◽  
Dynamic Weight ◽  
Injury Model ◽  
Recovery Dynamics

Gross and Histological Analysis of Healing After Dog Flexor Tendon Repair with the Teno Fix™ Device

2006 ◽  
Vol 31 (5) ◽  
pp. 524-529 ◽  
Author(s):  
B. W. SU ◽  
F. J. RAIA ◽  
H. M. QUITKIN ◽  
M. PARISIEN ◽  
R. J. STRAUCH ◽  
...  
Keyword(s):  
Flexor Tendon ◽  
Weight Bearing ◽  
Tendon Repair ◽  
Tendon Healing ◽  
Full Weight Bearing ◽  
Cast Immobilization ◽  
Flexor Tendon Repair ◽  
The Common ◽  
Flexor Digitorum

The purpose of this study was to examine the in vivo characteristics of the stainless-steel Teno Fix™ device used for flexor tendon repair. The common flexor digitorum superficialis tendon was transected in 16 dogs and repaired with the device. The animals were euthanized at 3, 6, or 12 weeks postoperatively. Difficulties with cast immobilization led nine of 16 animals to be full weight bearing too early, leading to rupture of their repairs. The seven tendons with successful primary repairs (gap <2 mm) underwent histological examination. This in vivo study demonstrates that use of the Teno Fix™ in “suture” of dog flexor tendons did not lead to scarring at the tendon surface, does not cause an inflammatory reaction within the tendon and does not interfere with tendon healing.

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