Motion analysis of human cadaver knee-joints using anatomical coordinate system

Katona, Gábor; Csizmadia, Béla; Bíró, István; Andrónyi, Kristóf; Krakovits, G

doi:10.17489/biohun/2010/1/12

Cited by 3 publications

(5 citation statements)

References 9 publications

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“…Among others, the rotation of the tibia -carried out by its self-weight -was measured as a function of flexion angle. Taking into consideration the numerous measurements carried out on human cadavers and the results found in the literature 4 (with significant deviations), it has been concluded that the flexionrotation functions depend on several parameters. They naturally depend on the investigated person (we examined in each case non-pathological knees), the type of the movement, the test rig, the examination method, the data acquisition system and significantly on the processing method.…”

Section: Methodsmentioning

confidence: 99%

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The first steps to the development of the knee prosthesis rating method

Csizmadia¹,

Balassa²,

Katona³

2013

Biomech Hung

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During prosthesis implantation, the surgeon can choose from replacements of a wide variety of manufacturers and sizes. So far, no specific coefficient has been introduced that determines the suitability, or goodness of these prostheses. In this paper an apparatus is presented for the qualification of knee prostheses. This apparatus is able to measure the rotation of any prosthesis, therefore the obtained results can be compared with the measured values on human cadaver knees. The prostheses are classified by the rate of their conformity. In addition, the first experimental results are reported as well.

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Section: Methodsmentioning

confidence: 99%

“…The model was described by a three-cylindrical mechanism, with six degrees of freedom (Figure 1). In our case, the movements were related to an anatomical coordinatesystem 4 .…”

Section: Methodsmentioning

confidence: 99%

The first steps to the development of the knee prosthesis rating method

Csizmadia¹,

Balassa²,

Katona³

2013

Biomech Hung

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“…These repetitions gave provided the same results, therefore the measurements are acceptably repeatable. 13 The flexion-rotation data was determined by transformations using the transformation matrices. The matrices were generated from the positions of the anatomical points, the markers, and the current positions of the trackers.…”

Section: Methods Of Experiments and Evaluationmentioning

confidence: 99%

“…The literature suggests that during knee flexion the movement can be divided into two parts. The first 20-30° section of the flexion is the section the screw-home motion, 13 where the kinematics is governed mainly by the geometry. After this section the motion is continuously passing through to active functional arc 13 where the movements of knee joint is controlled by the muscle forces collectively.…”

Section: Methods Of Experiments and Evaluationmentioning

confidence: 99%

Determination of reference function to knee prosthesis rating

Katona¹,

Csizmadia²,

Andrónyi³

2013

Biomech Hung

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The knee joint is one of the most complicated joints in the human body. Fundamental knowledge about kinematics is essentially important in order to design knee prostheses which are functionally similar to the knee joint. In addition, the prosthesis should carry out similar kinematics, since only the geometrical resemblance is insufficient. As an initial step, an experimental apparatus, a test protocol and an evaluation method were developed which allows the investigation of the human knee joint kinematics. Based on the results of multiple experiments, a reference function was determined, which provides guidance on how the flexionrotation function in the human knee joint can be described. The function also provides reference about the kinematics which should be defined in the design of prostheses, and to what extent does an arbitrary knee prosthesis follows the required kinematics. The definition of knee rotation is reported in this article.

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“…A keresett szögelfordulás az Euler-paraméte-rek egyikével (12) míg a szögelfordulás tengelyével párhuzamos egység vektor komponensei (13) Most tehető fel a címben meghatározottak szerint megválaszolandó kérdés: mi a mozgó koordinátarendszer két helyzete közötti véges szögelfordulás tengelyének irányítottsága és szöghelyzete? …”

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Approximate method for determining axis of finite rotation between two body segments

Bíró¹,

Fekete²

2017

biomech hung

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AbsztraktE tanulmány célja, humán ízületek véges szögelfordulás tengelye helyzetének és orientációjá-nak meghatározására alkalmas közelítő módszer bemutatása. Humán ízületekben a transzláci-ós mozgáskomponensek kevésbé dominánsak a rotációs mozgáskomponensekhez viszonyítva. Ezért, ha a szögelfordulás tengelyének helyzete és orientációja a meghatározandó, a transzlációs mozgáskomponensek biztonsággal elhanyagolhatóak. Az adatok gyűjtéséhez a Polaris optikai helyzet-meghatározó rendszert alkalmaztuk. A helyzet érzékelőket mereven rögzítettük minden egyes cadaver testrészhez annak érdekében, hogy a testrészek közötti szögelfordulás tengelye helyzetét és irányítottságát minél pontosabban meghatározzuk. A szenzor által rögzített adatok: a szenzorhoz kötött koordinátarendszer origójának három helyzetkoordinátája az abszolút koordináta-rendszerben, valamint a koordinátarendszerek közötti három Euler-szög. Példaként a módszer bemutatásra kerül egy emberi térdízületen. Kulcsszavak: véges szögelfordulás tengelye, Euler-paraméterek, optikai helyzet-meghatározás Approximate method for determining axis of finite rotation between two body segments AbstractThe aim of this paper is to present an approximate method for determining the position and orientation of the axis of finite rotation with regard to human joints. In human joints the translational motion components are less dominant compared to rotational motion components. For this reason, if the position and orientation of the axis of rotation have to be determined, the translational motion components can be safely neglected. For data acquisition, Polaris optical tracking system was used. Sensors were secured rigidly to each body parts of the cadaver specimen in order to determine accurately the position and orientation of the axis of rotation between body segments. The data was recorded by each sensor: three position components of the origin of reference frame, secured to the sensor in the absolute coordinate system, and three Euler-angles between the reference frame and the absolute coordinate system. As an example, the method is presented on a human knee joint.

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Motion analysis of human cadaver knee-joints using anatomical coordinate system

Cited by 3 publications

References 9 publications

The first steps to the development of the knee prosthesis rating method

The first steps to the development of the knee prosthesis rating method

Determination of reference function to knee prosthesis rating

Approximate method for determining axis of finite rotation between two body segments

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